CN101588125B

CN101588125B - Power-supply apparatus and control method, power amplifying device

Info

Publication number: CN101588125B
Application number: CN2009100875464A
Authority: CN
Inventors: 侯召政; 唐志
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2009-06-23
Filing date: 2009-06-23
Publication date: 2012-01-18
Anticipated expiration: 2029-06-23
Also published as: CN101588125A

Abstract

The embodiment of the invention relates to a power-supply apparatus and control method, a power amplifying device. The device includes a includes linear branch and a first switch power supply group, the first switch power supply group includes a first current detector and at least two switch power supply branches, the switch power supply branch includes a hysteresis controller and a switch power supply drive and power circuit, the input end of the first electrical current detector is connected with the output end of the linear power supply branch, the input end of the hysteresis controller is connected with the output end of the first electrical current detector, the input end of the switch power supply drive and power circuit is connected with the output end of the hysteresis controller, the output end thereof is in parallel connection with the output end of the linear power supply branch. The embodiment of the invention can improve the band width and the tracking accuracy of the switch power supply, further improve the integral efficiency of the ET power amplifier.

Description

Supply unit and control method thereof, power amplifier device

Technical field

The present invention relates to circuit engineering, relate in particular to a kind of supply unit and control method thereof, power amplifier device.

Background technology

Modern wireless communication systems; For example: code division multiple access (Code Division Multiple Address; Be called for short: CDMA), (Wideband Code Division Multiple Address is called for short: WCDMA), (Universal Mobile TelecommunicationSystem is called for short: UMTS), next generation network (Long Term Evolution UMTS WCDMA; Be called for short: LTE) for making full use of frequency spectrum; Adopt the variable envelope modulated technology of amplitude modulation simultaneously and phase modulation, this technology has higher peak-to-average power ratio (Peak-to-Average Power Ratio, abbreviation: PAPR) and the amplitude of broad and frequency dynamic scope; And the too high meeting of PAPR makes transmitting terminal have relatively high expectations to the linearity of power amplifier, needs to use the linear power amplifier amplifying signal.Envelope-tracking (Envelope Tracking, hereinafter to be referred as: ET) technology is one of the efficient of raising power amplifier under the high PAPR and effective ways of the linearity.Adopt the power amplifier of ET technology to be called the ET power amplifier, it comprises radio frequency amplification branch and envelope amplification branch.Wherein, the radio frequency amplification branch is amplified the phase place and the amplitude of radio-frequency input signals, and the permission amplitude has bigger distortion, to improve the efficient of radio-frequency power amplifier; The envelope amplification branch extracts amplitude envelope information through envelope detector from radio-frequency input signals, amplify then, and the power supply of control radio-frequency power amplifier makes supply voltage change with envelope variation.The ET power amplifier can improve the efficient of power amplifier when guaranteeing the linearity.

A kind of power supply of ET radio-frequency power amplifier comprises two parts in the prior art: linear power supply A and Switching Power Supply B, the output of linear power supply A and Switching Power Supply B is connected in parallel, and supplies power to radio-frequency power amplifier jointly.Wherein, linear power supply A adopts voltage close loop to follow the tracks of the high-frequency envelope signal, is the VCVS (VCVS) of a poor efficiency; Switching Power Supply B adopts current closed-loop, the output current of sense switch power supply A, and according to the output current of the output current of Switching Power Supply A adjustment Switching Power Supply B, be a high efficiency CCCS (CCCS).Linear power supply A guarantees that output has the lower distortion factor, and Switching Power Supply B improves whole efficient.

In realizing process of the present invention, the inventor finds that there is following defective at least in prior art: because the development of multi-transceiver technology, the bandwidth of envelope signal also reaches tens MHz.And existing Switching Power Supply adopts approximate triangular wave to approach signal to be tracked; Its switching tube is controlled by reasons such as technology, power, encapsulation technology and switching loss; And to take into account power output and switching speed, the switching frequency of Switching Power Supply is difficult to accomplish more than the 10MHz.According to the restriction relation between switching frequency and the Switching Power Supply bandwidth (the Switching Power Supply bandwidth is below 1/5 of switching frequency usually), Switching Power Supply can't be accomplished high bandwidth and high power tracking accuracy simultaneously, thereby the whole efficiency of prior art power amplifier is not high.

Summary of the invention

The embodiment of the invention provides a kind of supply unit and control method thereof, power amplifier device, in order to improving the bandwidth and the tracking accuracy of Switching Power Supply, and then improves the whole efficiency of ET power amplifier.

The embodiment of the invention provides a kind of supply unit; Comprise linear power supply branch road, first current detector and the first Switching Power Supply group; The input of said first current detector is connected with the output of said linear power supply branch road; The said first Switching Power Supply group comprises at least two Switching Power Supply branch roads; Said Switching Power Supply branch road comprises stagnate ring controller and Switching Power Supply driving and power circuit; The input of said stagnant ring controller is connected with the output of said first current detector, and said Switching Power Supply drives and the input of power circuit is connected with the output of said stagnant ring controller, and the said Switching Power Supply driving and the output of power circuit and the output of said linear power supply branch road are connected in parallel; Wherein:

Said linear power supply branch road is used for receiving inputted signal, according to said input signal, and the output voltage of control supply unit; According to the output current and the load current of said at least two Switching Power Supply branch roads, electric current affords redress;

Said first current detector is used to detect the output current of said linear power supply branch road, and said output current is converted into detection signal, exports said detection signal;

Said stagnant ring controller is used for the detection signal according to the control window of said stagnant ring controller and the output of said first current detector, adopts preset multistage stagnant ring control strategy, the output control signal; Said Switching Power Supply drives and power circuit is used under the control of the control signal that said stagnant ring controller is exported, controlling the output current of this Switching Power Supply branch road.

The embodiment of the invention also provides a kind of control method of supply unit; Be applied in the supply unit that comprises linear power supply branch road, first current detector and the first Switching Power Supply group; The said first Switching Power Supply group comprises at least two Switching Power Supply branch roads, and said Switching Power Supply branch road comprises stagnate ring controller and Switching Power Supply driving and power circuit; The input of said first current detector is connected with the output of said linear power supply branch road; The input of said stagnant ring controller is connected with the output of said first current detector; Said Switching Power Supply drives and the input of power circuit is connected with the output of said stagnant ring controller, and the said Switching Power Supply driving and the output of power circuit and the output of said linear power supply branch road are connected in parallel; This method comprises:

Said linear power supply branch road receiving inputted signal, according to said input signal, the output voltage of control supply unit;

First current detector detects the output current of said linear power supply branch road, and said output current is converted into detection signal, exports said detection signal;

Said stagnant ring controller adopts preset multistage stagnant ring control strategy, the output control signal according to the control window of the ring controller that should stagnate and the detection signal of said first current detector output;

Said Switching Power Supply driving and power circuit are controlled the output current of this Switching Power Supply branch road under the control of the control signal of said stagnant ring controller output;

Said linear power supply branch road is according to the output current and the load current of said at least two Switching Power Supply branch roads, and electric current affords redress.

The embodiment of the invention also provides a kind of power amplifier device; Comprise power amplifier and supply unit; Said supply unit is used for receiving inputted signal, according to said input signal, controls the output voltage of said supply unit; Adopt preset multistage stagnant ring control strategy, control the output current of said supply unit;

Said power amplifier is used under the control of said output voltage and said output current, amplifying said input signal.

The embodiment of the invention adopts multistage stagnant ring control strategy; Adjust the output current of supply unit through at least two Switching Power Supply branch roads; Make it further improve the tracking accuracy and the speed of Switching Power Supply branch road; Make the output current of supply unit and the dynamic error of load current reduce, thereby reduce the output current of linear power supply branch road, the power output of minimizing linear power supply.Thereby improved the whole efficiency of ET power amplifier.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.

The structural representation of the embodiment that Fig. 1 provides for supply unit of the present invention;

The structural representation of the embodiment that Fig. 2 provides for supply unit of the present invention;

The waveform sketch map of electric current under different coordinates that each Switching Power Supply branch road provides among the embodiment that Fig. 3 provides for supply unit of the present invention;

The waveform sketch map of electric current under same coordinate system that each Switching Power Supply branch road provides among the embodiment that Fig. 4 provides for supply unit of the present invention;

A kind of sketch map of controlling window of each stagnant ring controller among the embodiment that Fig. 5 A provides for supply unit of the present invention;

The sketch map of the another kind of each stagnant ring controller control window among the embodiment that Fig. 5 B provides for supply unit of the present invention;

The sketch map of the another kind of each stagnant ring controller control window among the embodiment that Fig. 6 A provides for supply unit of the present invention;

The sketch map of the another kind of each stagnant ring controller control window among the embodiment that Fig. 6 B provides for supply unit of the present invention;

The sketch map of the another kind of each stagnant ring controller control window among the embodiment that Fig. 7 A provides for supply unit of the present invention;

The sketch map of the another kind of each stagnant ring controller control window among the embodiment that Fig. 7 B provides for supply unit of the present invention;

The structural representation of the embodiment that Fig. 8 provides for supply unit of the present invention;

The schematic flow sheet of the embodiment that Fig. 9 provides for the control method of supply unit of the present invention;

The schematic flow sheet of the embodiment that Figure 10 provides for the control method of supply unit of the present invention;

The schematic flow sheet of the embodiment that Figure 11 provides for the control method of supply unit of the present invention;

The structural representation of the embodiment that Figure 12 provides for power amplifier device of the present invention.

Embodiment

To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.

As shown in Figure 1; The structural representation of an embodiment who provides for supply unit of the present invention; Can comprise a linear power supply branch road 21, first current detector 22 and one first Switching Power Supply group 20; The first Switching Power Supply group 20 can comprise at least two Switching Power Supply branch roads: Switching Power Supply branch road 201, Switching Power Supply branch road 202 ... Switching Power Supply branch road 20N, N is equal to or greater than 2.Switching Power Supply branch road 201 can comprise that a stagnant ring controller 2011 and a Switching Power Supply drive and power circuit 2012.Switching Power Supply branch road 202 can comprise that a stagnant ring controller 2021 and a Switching Power Supply drive and power circuit 2022.The rest may be inferred, and Switching Power Supply branch road 20N can comprise that a stagnant ring controller 20N1 and a Switching Power Supply drive and power circuit 20N2.The input of first current detector 22 is connected with the output of linear power supply branch road 21; Switching Power Supply driving and power circuit 2012, Switching Power Supply driving and power circuit 2022 ..., Switching Power Supply drives and the input of power circuit 20N2 is connected with the output of first current detector 22, the output of output and linear power supply branch road 21 is connected in parallel.

Wherein, linear power supply branch road 21 is used for receiving inputted signal, according to this input signal, and the output voltage of control supply unit; First current detector 22 is used to detect the output current of linear power branch 21, and this output current is converted into detection signal, exports this detection signal.

Preferably, first current detector 22 can also comprise and amplifying and filter circuit, and the output current that detects is converted into voltage, and amplification, filtering choose the voltage of proper frequency section, exports this voltage.Alternatively, the electric current that the output current that first current detector 22 also can just detect amplifies, the proper frequency section is chosen in filtering is exported this electric current;

Stagnate ring controller 2011, the ring controller 2021 that stagnates ... The ring controller 20N1 that stagnates is respectively applied for the voltage according to its control window and 22 outputs of first current detector, adopts preset multistage stagnant ring control strategy, the output control signal;

Preferably; When the detection signal of first current detector 22 output triggers the ring controller 2011 that stagnates, the ring controller 2021 that stagnates ... Going up in limited time of the control window of stagnant ring controller 20N1; Stagnate ring controller 2011, the ring controller 2021 that stagnates ... Ring controller 20N1 output corresponding control signal stagnates; When the detection signal of first current detector 22 output drop to less than stagnant ring controller 2011, stagnant ring controller 2021 ... Stagnate ring controller 20N1 the control window following in limited time, the ring controller 2011 that stagnates, the ring controller 2021 that stagnates ... The ring controller 20N1 that stagnates stops to export control signal.

Switching Power Supply driving and power circuit 2012, Switching Power Supply driving and power circuit 2022 ... Switching Power Supply drives and power circuit 20N2 be respectively applied for the stagnant ring controller 2011 in correspondence, the ring controller 2021 that stagnates ... Stagnate under the control of control signal of ring controller 20N1 output, control the 1st Switching Power Supply branch road 201, the 2nd Switching Power Supply branch road 202 ... The output current of N Switching Power Supply branch road 20N.

In the present embodiment; Stagnate ring controller 2011, the ring controller 2021 that stagnates ... Stagnate ring controller 20N1 according to the corresponding a plurality of control windows of load current range, respectively corresponding control ring control switching driving and power circuit 2012, Switching Power Supply driving and power circuit 2022 ... Switching Power Supply drives and power circuit 20N2.Detect the output current of linear power branch 21 and this output current is converted into control signal and output through first current detector 22; Stagnate ring controller 2011, the ring controller 2021 that stagnates ... The detection signal of ring controller 20N1 according to 22 outputs of first current detector stagnates; Adopt multistage stagnant ring control strategy; The output corresponding control signal, this control signal control ring control switching driving and power circuit 2012, Switching Power Supply driving and power circuit 2022 ... Switching Power Supply drives and power circuit 20N2 provides output current.

Each unit of the embodiment of the invention can be integrated in one, and also can separate deployment.Said units can be merged into a unit, also can further split into a plurality of subelements.

Present embodiment adopts multistage stagnant ring control strategy; Adjust the output current of supply unit through the first Switching Power Supply group 20; Make it further improve tracking accuracy and speed; Make the output current of supply unit and the dynamic error of load current reduce, thereby reduce the output current of linear power supply branch road, the power output of minimizing linear power supply branch road.Thereby improved the whole efficiency of ET power amplifier.

As shown in Figure 2; The structural representation of an embodiment who provides for supply unit of the present invention; On the basis of structural representation shown in Figure 1, the 1st Switching Power Supply branch road 201, the 2nd Switching Power Supply branch road 202 ... N Switching Power Supply branch road 20N can comprise three Switching Power Supply branch roads: main switch power branch 31, forward compensated switching power supply branch road 32 and negative sense compensated switching power supply branch road 33.Wherein, Main switch power branch 31 comprises main ring controller 311 and main switch power drives and the power circuit 312 of stagnating; Forward compensated switching power supply branch road 32 comprises that stagnant ring controller 321 of forward compensation and forward compensated switching power supply drive and power circuit 322, and negative sense compensated switching power supply branch road 33 comprises that negative sense compensates stagnate ring controller 331 and driving of negative sense compensated switching power supply and power circuit 332.

The upper limit of the control window of the upper limit of the control window of the main ring controller 311 that stagnates and the stagnant ring controller 321 of forward compensation is greater than zero; And the lower limit of the control window of the stagnant ring controller 311 of master is less than or equal to the lower limit of the control window of the stagnant ring controller 321 of forward compensation, and the lower limit that window is controlled in the triggering of the stagnant ring controller 331 of negative sense compensation is less than zero.

The main ring controller 311 that stagnates is used for the voltage according to the control window of the main ring controller 311 that stagnates and 22 outputs of first current detector, adopts preset multistage stagnant ring control strategy, the output control signal;

Main switch power drives and power circuit 312 are used under the control of the control signal of main ring controller 311 outputs that stagnate, main output current being provided;

Preferably; Main switch power branch 31 can trigger at the detection signal that first current detector 22 detects output in time period of lower limit of the upper limit and the control window that triggers the main ring controller 311 that stagnates of descending of control window of the main ring controller 311 that stagnates, and main output current is provided.

The stagnant ring controller 321 of forward compensation is used for the voltage according to the control window of the stagnant ring controller 321 of forward compensation and 22 outputs of first current detector, adopts the multistage stagnant ring control strategy of presetting, the output control signal;

The forward compensated switching power supply drives and power circuit 322 is used under the control of the control signal that the stagnant ring controller 321 of forward compensation is exported, the forward offset current being provided;

Preferably; Forward compensated switching power supply branch road 32 triggers the stagnate upper limit and descending of control window of ring controller 321 of forward compensation at the detection signal of first current detector 22 output and triggers the forward compensation and stagnate in time period of lower limit of control window of ring controller 321, and the forward offset current is provided.

The stagnant ring controller 331 of negative sense compensation is used for the voltage according to the control window of the stagnant ring controller 331 of negative sense compensation and 22 outputs of first current detector, adopts the multistage stagnant ring control strategy of presetting, the output control signal;

The negative sense compensated switching power supply drives and power circuit 332 is used under the control of the control signal that the stagnant ring controller 331 of negative sense compensation is exported, the negative sense offset current being provided;

Preferably; Negative sense compensated switching power supply branch road 33 triggers the stagnate lower limit and rising of control window of ring controller 331 of negative sense compensation at the detection signal of first current detector 22 output and triggers the negative sense compensation and stagnate in time period of the upper limit of control window of ring controller 331, and the negative sense offset current is provided.

In this example, main switch power drives and power circuit 312 can comprise drive circuit 801, switching tube 601, diode 501 and inductance 701.The forward compensated switching power supply drives and power circuit 322 can comprise drive circuit 802, switching tube 602, diode 502 and inductance 702.The negative sense compensated switching power supply drives and power circuit 332 can comprise drive circuit 803, switching tube 603, diode 503 and inductance 703.

In the present embodiment, the output of linear power supply branch road 21, main switch power branch 31, forward compensated switching power supply branch road 32, negative sense compensated switching power supply branch road 33 is connected in parallel, and to RF power amplification power supply is provided.First current detector 22 detects the output current of linear power branch 21; The output current of detection is through the laggard ring controller 311 that stagnates, the stagnant ring controller 321 of forward compensation, the stagnant ring controller 331 of negative sense compensation of becoming owner of of relevant treatment such as amplification, filtering; The main ring controller 311 that stagnates, forward compensation stagnate ring controller 321 and negative sense compensation stagnate ring controller 331 respectively according to the stagnant ring window control strategy output of self corresponding control signal to corresponding drive circuit 801,802,803, drive circuit 801,802,803 drives corresponding switching tube 601,602,603 actions respectively and makes its control output current of the main switch power branch 31 through inductance 701,702,703, forward compensated switching power supply branch road 32, negative sense compensated switching power supply branch road 33 respectively.

Linear power supply branch road 21 can adopt linear voltage control voltage source (can be independent 1 linear power supply as the linear voltage control voltage source, also can be the linear voltage control voltage source that a plurality of linear power supply serial or parallel connections combine).Output 401 at supply unit detects output voltage and feeds back to linear power supply branch road 21, compares with the envelope signal of importing, and controls the output voltage of linear power branch 21.Because linear power supply branch road 21 is operated in the linear work district, dynamic response is fast, and it is little to guarantee that output voltage signal and envelope signal are compared the distortion factor.In addition, linear power supply branch road 21 also can guarantee output accuracy and bandwidth through feedforward or digital pre-distortion (DPD) technology.

Main switch power branch 31 is a low bandwidth, the powerful main Switching Power Supply of following the tracks of.First current detector 22 detects the output current of linear power branch 21, and the output current of detection is through the laggard ring controller 311 that stagnates of becoming owner of of relevant treatment such as amplification, filtering; To corresponding drive circuit 801, drive circuit 801 drives corresponding switching tube 601 actions and makes the output current of its control through inductance 701 the main ring controller 311 that stagnates according to the ring window control strategy output corresponding control signal that self stagnates.Drive circuit 801, switching tube 601, inductance 701, diode 501 constitutes the power section of main switch power branch 31.The main control window that stagnates ring controller 311 can be provided with the lower lower limit and the window width of broad; Because window width broad; So under the situation of equivalent signals pendulum rate; The control signal frequency of main ring controller 311 outputs that stagnate is lower, so main switch power branch 31 responds low frequencies, big current signal, the main power composition of load current is provided.Main switch power branch 31 can be selected the low speed power device of big electric current for use, and switching frequency corresponding lower (below 1MHz) has correspondingly reduced switching loss.

Forward compensated switching power supply branch road 32 is a high-frequency, low power forward compensated switching power supply.First current detector 22 detects the output current of linear power branch 21, and the output current of detection gets into the stagnant ring controller 321 of forward compensation after relevant treatment such as amplification, filtering; Forward compensation stagnate ring controller 321 according to self window control strategy output corresponding control signal to corresponding drive circuit 802, drive circuit 802 drives corresponding switching tube 602 actions and makes the output current of its control through inductance 702.Drive circuit 802, switching tube 602, inductance 702, diode 502 constitute the power section of forward compensated switching power supply branch road 32.The control window of the stagnant ring controller 321 of forward compensation can be provided with higher lower limit and narrower window width; Because window width is narrower; So under the situation of equivalent signals pendulum rate; The control signal frequency of stagnant ring controller 321 outputs of forward compensation is corresponding higher, and the lower limit of the ring window that stagnates is higher, so most of electric current does not trigger the stagnant ring controller 321 of forward compensation.Forward compensated switching power supply branch road 32 response high-frequencies, little current signal when main switch power branch 31 responses of high frequency peak value letter are not enough, provide the forward offset current.Therefore the power output of forward compensated switching power supply branch road 32 is less, switching frequency is higher (more than 1MHz); Can select the high-speed power device of little electric current for use; Improve response speed, reduced the output current of linear power supply branch road 31 simultaneously, improved total power-efficient.

Negative sense compensated switching power supply branch road 33 is a high-frequency, low power negative sense compensated switching power supply.First current detector 22 detects the output current of linear power branch 21, and the output current of detection gets into the stagnant ring controller 331 of negative sense compensation after relevant treatment such as amplification, filtering; To corresponding drive circuit 803, corresponding switching tube 603 actions of drive circuit 803 drivings make the output current of its control through inductance 703 to the stagnant ring controller 331 of negative sense compensation according to the ring window control strategy output corresponding control signal that self stagnates.Drive circuit 803, switching tube 603, inductance 703, diode 503 constitute the power section of negative sense compensated switching power supply branch road 33.The control window of the stagnant ring controller 331 of negative sense compensation can be provided with the negative upper limit and narrower window width; Because the upper limit of control window is set to bear; So can not trigger the stagnant ring controller 331 of negative sense compensation under the total output current deficiency worked as or the situation just in time; Just can trigger the negative sense compensation ring controller 331 that stagnates when having only the electric current that provides when main switch power branch 31, forward compensated switching power supply branch road 32, negative sense compensated switching power supply branch road 33 to exceed load current demand to reach to a certain degree; Make negative sense compensated switching power supply branch road 33 that the negative sense offset current is provided, reduce the electric current that linear power supply branch road 21 absorbs; And the width setting of the control window of the stagnant ring controller 331 of negative sense compensation is narrower; So the control signal frequency of stagnant ring controller 331 outputs of negative sense compensation is corresponding higher under the situation of equivalent signals pendulum rate; Negative sense compensated switching power supply branch road 33 response high-frequencies, little current signal; The power output of negative sense compensated switching power supply branch road 33 is less, switching frequency is higher (more than 1MHz), can select the high-speed power device of little electric current for use, improves response speed; Reduce the electric current that linear power supply branch road 21 absorbs simultaneously, improved the overall efficiency of supply unit.

The waveform sketch map of electric current under different coordinates as shown in Figure 3, that each Switching Power Supply branch road provides among the embodiment who provides for supply unit of the present invention, as shown in Figure 4; The waveform sketch map of electric current under same coordinate system that each Switching Power Supply branch road provides among the embodiment who provides for supply unit of the present invention; Wherein, 2000 is the output current of linear power

supply branch road

21, and 2001 is load current; 2002 is the output current of main switch power branch 311; 2003 is the output current of forward compensated switching power

supply branch road

32, and 2004 is the output current of negative sense compensated switching power supply branch road 33, has effectively improved the tracking velocity and the precision of Switching Power Supply through adopting multistage stagnant ring control strategy; Reduce the power of linear power supply output, effectively improved the efficient of ET power amplifier.

In this example, the control window of each stagnant ring controller can space, adjacent or overlapping, and the control window width of each stagnant ring controller can be identical or different.Shown in Fig. 5 A; A kind of sketch map of controlling window of each stagnant ring controller among the embodiment who provides for supply unit of the present invention; Shown in Fig. 5 B; The sketch map of the another kind of each stagnant ring controller control window among the embodiment who provides for supply unit of the present invention, in Fig. 5 A and Fig. 5 B, control window 1001 is the control window of main stagnant ring controller 311; Controlling window 1002 is the control window of the stagnant ring controller 321 of forward compensation, and control window 1003 is the control window of the stagnant ring controller 331 of negative sense compensation; The window width of control window 1001, control window 1002, control window 1003 is identical, and the space.Shown in Fig. 6 A; The sketch map of the another kind of each stagnant ring controller control window among the embodiment who provides for supply unit of the present invention; Shown in Fig. 6 B; The sketch map of the another kind of each stagnant ring controller control window among the embodiment who provides for supply unit of the present invention, in Fig. 6 A and Fig. 6 B, control window 1011 is the control window of main stagnant ring controller 311; Controlling window 1012 is the control window of the stagnant ring controller 321 of forward compensation, and control window 1013 is the control window of the stagnant ring controller 331 of negative sense compensation; The window width of control window 1011, control window 1012, control window 1013 is identical, controls window 1011 and control window 1012 and control window 1013 intervals, and control window 1012 is adjacent with control window 1013.Shown in Fig. 7 A; The sketch map of the another kind of each stagnant ring controller control window among the embodiment who provides for supply unit of the present invention, shown in Fig. 7 B, the sketch map of the another kind control window of each stagnant ring controller among the embodiment who provides for supply unit of the present invention; In Fig. 7 A and Fig. 7 B; 1021 is the control window of the stagnant ring controller 311 of master, the 1022 control windows for the stagnant ring controller 321 of forward compensation, the 1023 control windows for the stagnant ring controller 331 of negative sense compensation; The window width of control window 1021, control window 1022, control window 1023 is different, and control window 1022 comprises control window 1023.Need to prove, adopt the combination of the control window of multistage stagnant ring control strategy can stagger or leave the gap respectively according to applicable cases, also can direct neighbor, further, the ring window that stagnates can comprise another one or a plurality of control window.Fig. 5 A, Fig. 5 B, Fig. 6 A, Fig. 6 B, Fig. 7 A, Fig. 7 B have enumerated the typical combination of several kinds of control windows, are not limited to Fig. 5 A, Fig. 5 B, Fig. 6 A, Fig. 6 B, Fig. 7 A, the cited situation of Fig. 7 B but the present invention comprises.In addition, the amplitude of the control signal of each stagnant ring controller output also can be decided according to concrete application.Again referring to Fig. 5 A, Fig. 6 A and Fig. 7 A; Trigger the going up of control window of each stagnant ring controller prescribes a time limit when detection signal; The positive control signal that each stagnant ring controller output amplitude is bigger; When dropping to less than the following of each stagnant ring controller, detection signal prescribes a time limit the positive control signal that each stagnant ring controller output amplitude is less; Again referring to Fig. 5 B, Fig. 6 B and Fig. 7 B; Trigger the going up of control window of each stagnant ring controller prescribes a time limit when detection signal; Each stagnant ring controller output amplitude is positive control signal; Prescribe a time limit when detection signal drops to less than the following of each stagnant ring controller, each stagnant ring controller output amplitude is negative control signal.

In addition, need to prove that present embodiment can also only be chosen forward compensated switching power supply branch road or only choose negative sense compensated switching power supply branch road according to practical application request, correspondence has only the stagnant ring controller of forward compensation or has only the stagnant ring controller of negative sense compensation respectively.

In the present embodiment; Adopt the main switch power branch 31 of high-power, low frequency, low control lower window edge to follow the tracks of main power composition; The power difference part is at first adjusted through forward compensated switching power supply branch road 32, negative sense compensated switching power supply branch road 33, and meticulous adjustment member realizes through linear power supply branch road 21.Adopt this framework can satisfy the requirement that power output height, bandwidth are high, efficient is high simultaneously.Whole efficiency than prior art is high.

As shown in Figure 8, the structural representation of an embodiment who provides for supply unit of the present invention on the basis of structural representation shown in Figure 2, can also comprise the second switch power pack 90 and second current detector 91.Wherein, second switch power pack 90 can comprise and at least one Switching Power Supply branch road: Switching Power Supply branch road 901 ... Switching Power Supply branch road 90M, M is more than or equal to 1.Switching Power Supply branch road 901 can comprise that the ring controller 9011 that stagnates drives and power circuit 9012 with Switching Power Supply.The rest may be inferred, and Switching Power Supply branch road 90M can comprise stagnate ring controller 90M1 and Switching Power Supply driving and power circuit 90M2.Wherein, The input of second current detector 91 and linear power supply branch road 21 and Switching Power Supply branch road 201, Switching Power Supply branch road 202 ... The road of closing of the output of Switching Power Supply branch road 20N connects; Stagnant ring controller 9011 ... The input of stagnant ring controller 90M1 is connected with the output of second current detector 91 respectively; Switching Power Supply driving and power circuit 9012 ... Switching Power Supply drive and the input of power circuit 90M2 respectively with stagnant ring controller 9011 ... The ring controller 90M1 output that stagnates connects, Switching Power Supply driving and power circuit 9012 ... The output of Switching Power Supply driving and power circuit 90M2 and this close the road and are connected in parallel.

Second current detector 91 is used to detect the electric current that this closes the road, and this electric current that closes the road is converted into detection signal, exports this detection signal.

Preferably, second current detector 91 can also comprise and amplifying and filter circuit, and the electric current that closes the road that detects is converted into voltage, and amplification, filtering choose the voltage of proper frequency section, exports this voltage.Alternatively, second current detector 91 can also comprise amplification and filter circuit, with the electric current that the electric current that closes the road amplifies, the proper frequency section is chosen in filtering that detects, exports this electric current.

Stagnant ring controller 9011 ... The ring controller 90M1 that stagnates is respectively applied for the detection signal according to 91 outputs of second current detector, adopts preset multistage stagnant ring control strategy, the output corresponding control signal;

Preferably; Stagnant ring controller 9011 ... Stagnate ring controller 90M1 respectively the detection signal of second current detector, 91 outputs trigger this its control window in limited time; The output corresponding control signal; On voltage triggered this its control window of exporting at second current detector 91,, export corresponding control signal in limited time;

Switching Power Supply driving and power circuit 9012 ..., Switching Power Supply drives and power circuit 90M2 be respectively applied for stagnant ring controller 9011 ... Under the control of the control signal that the ring controller 90M1 that stagnates exports, control switching branch road 901 ... The output current of Switching Power Supply branch road 90M.

In the present embodiment, linear power supply branch road 21 also be used for according to Switching Power Supply branch road 201, Switching Power Supply branch road 202 ... Switching Power Supply branch road 20N, Switching Power Supply branch road 901 ... Output current and the load current of Switching Power Supply branch road 90M, electric current affords redress.

In the present embodiment, Switching Power Supply drive and power circuit 9012 ..., Switching Power Supply drives and the control window width of power circuit 90M2 can be identical or different, and can space, adjacent or overlapping.

In the present embodiment, comprise two groups of Switching Power Supplies: the first Switching Power Supply group 20 and the output current of second switch power pack 90, the first Switching Power Supply groups 20 through the linear power branch 21 of detection; Adopt many hysteresis control method thereofs; Control its output current, second switch power pack 90 adopts many hysteresis control method thereofs through the summation of the detection first Switching Power Supply group 20 with the output current of linear power supply branch road 21; Control its output current, realize total improved efficiency.

Need to prove that the embodiment of the invention is not limited to above-mentioned two Switching Power Supply groups, can also comprise more a plurality of Switching Power Supply groups.

As shown in Figure 9, the schematic flow sheet of an embodiment who provides for the control method of supply unit of the present invention can comprise the steps:

Step 101, linear power supply branch road receiving inputted signal, according to this input signal, the output voltage of control supply unit;

First current detector that step 102, input are connected with the output of this linear power supply branch road detects the output current of this linear power supply branch road, and output current is converted into detection signal, exports this detection signal;

Preferably, first current detector can also comprise and amplifying and filter circuit, and the output current that detects is converted into voltage, and amplification, filtering choose the voltage of proper frequency section, exports this voltage.Alternatively, first current detector also can be exported this electric current with the electric current that output current amplifies, the proper frequency section is chosen in filtering that detects.

Can comprise the first Switching Power Supply group in the present embodiment, this first Switching Power Supply group can comprise at least two Switching Power Supply branch roads; Can comprise the steps: after the step 101

In the present embodiment, each Switching Power Supply branch road can comprise that a stagnant ring controller and a Switching Power Supply drive and power circuit; Can also comprise the steps: after the step 102

Each stagnant ring controller that step 103, input are connected with the output of first current detector adopts preset multistage stagnant ring control strategy according to the detection signal of its control window and the output of first current detector, the output control signal;

Preferably; Trigger the going up in limited time of control window of each stagnant ring controller when the detection signal of first current detector output; Each stagnant ring controller output corresponding control signal; When the detection signal of first current detector output drop to less than the control window of each stagnant ring controller following in limited time, each stagnant ring controller stops to export control signal.

Each Switching Power Supply that step 104, input are connected with the output of stagnant ring controller, the output of output and linear power supply branch road is connected in parallel drive and power circuit under the control of the control signal of the ring controller output that stagnates, control the output current of each Switching Power Supply branch road;

The output current and the load current of step 105, at least two Switching Power Supply branch roads of linear power supply branch road basis, electric current affords redress.

In the present embodiment, the control window width of each stagnant ring controller can be identical, also can be different.The control window of each stagnant ring controller can space, adjacent or overlapping.

In the present embodiment, a plurality of stagnant ring controllers are according to the corresponding a plurality of control windows of load current range, and a plurality of Switching Power Supplies of corresponding respectively control drive and power circuit.Detect the output current of linear power branch and this output current is converted into detection signal and output through first current detector; Each stagnant ring controller is according to the detection signal of first current detector output; Adopt multistage stagnant ring control strategy; Output corresponding control signal, this control signal are controlled corresponding Switching Power Supply driving and power circuit provides output current.

Embodiment of the invention method can be adjusted each sequence of steps according to actual needs.

Present embodiment adopts the method for multistage stagnant ring control; Adjust the output current of supply unit through a plurality of Switching Power Supply branch roads; Make it further improve tracking accuracy and speed; Make the output current of supply unit and the dynamic error of load current reduce, thereby reduce the output current of linear power supply branch road, the power output of minimizing linear power supply.Thereby improved the whole efficiency of ET power amplifier.

Shown in figure 10; The schematic flow sheet of an embodiment who provides for the control method of supply unit of the present invention; On the basis of a last embodiment, at least two Switching Power Supply branch roads can comprise linear power supply branch road, main switch power branch, forward compensated switching power supply branch road and negative sense compensated switching power supply branch road.Wherein, The main switch power branch comprises main ring controller and main switch power drives and the power circuit of stagnating; Forward compensated switching power supply branch road comprises that stagnant ring controller of forward compensation and forward compensated switching power supply drive and power circuit, and negative sense compensated switching power supply branch road comprises that stagnant ring controller of negative sense compensation and negative sense compensated switching power supply drive and power circuit.

Wherein, The upper limit of the control window of the upper limit of the control window of the main ring controller that stagnates and the stagnant ring controller of forward compensation is greater than zero; And the lower limit of the control window of the stagnant ring controller of master is less than or equal to the lower limit of the control window of the stagnant ring controller of forward compensation, and the lower limit that window is controlled in the triggering of the stagnant ring controller of negative sense compensation is less than zero.

Present embodiment can comprise the steps:

Step 111, linear power supply branch road receiving inputted signal, according to this input signal, the output voltage of control supply unit;

First current detector that step 112, input are connected with the output of this linear power supply branch road detects the output current signal of this linear power supply branch road, and output current is converted into detection signal, exports this detection signal;

Step 113, the main ring controller that stagnates are according to the control window of the main ring controller that stagnates and the detection signal of first current detector output; Adopt preset multistage stagnant ring control strategy; The output control signal; Main switch power drives and power circuit provide main output current under the control of the control signal of the main ring controller output that stagnates;

Preferably, the main switch power branch can trigger at the detection signal that first current detector detects output in time period of lower limit of the upper limit and the control window that triggers the main ring controller that stagnates of descending of control window of the main ring controller that stagnates, and main output current is provided;

Step 114, forward compensation stagnate ring controller according to the control window of the stagnant ring controller of forward compensation and the detection signal of first current detector output; Adopt preset multistage stagnant ring control strategy; The output control signal; Driving of forward compensated switching power supply and power circuit provide the forward offset current under the control of the control signal of the stagnant ring controller output of forward compensation;

Preferably; Forward compensated switching power supply branch road provides the forward offset current in the time period of the lower limit of the control window of the upper limit of the control window of the stagnant ring controller of detection signal triggering forward that first current detector is exported and the stagnant ring controller of triggering forward that descends;

Step 115, negative sense compensation stagnate ring controller according to the control window of the stagnant ring controller of negative sense compensation and the detection signal of first current detector output; Adopt preset multistage stagnant ring control strategy; The output control signal; Driving of negative sense compensated switching power supply and power circuit provide the negative sense offset current under the control of the control signal of the stagnant ring controller output of negative sense compensation.

Preferably; Negative sense compensated switching power supply branch road provides the negative sense offset current in the time period of the upper limit of the control window of the lower limit of the control window of the stagnant ring controller of detection signal triggering negative sense that first current detector is exported and the stagnant ring controller of triggering negative sense that rises.

Step 116, linear power supply branch road are according to the output current and the load current of main switch power branch, forward compensated switching power supply branch road and negative sense compensated switching power supply branch road, and electric current affords redress.

In the present embodiment, the control window width of each stagnant ring controller is identical or different, and the control window can space, adjacent or overlapping.

In the present embodiment, the main switch power branch is followed the tracks of main power composition, and the power difference part is at first adjusted through forward compensated switching power supply branch road, negative sense compensated switching power supply branch road, and meticulous adjustment member realizes through the linear power supply branch road.Adopt this framework can satisfy the requirement that power output height, bandwidth are high, efficient is high simultaneously.Whole efficiency than prior art is high.

Shown in figure 11; The schematic flow sheet of an embodiment who provides for the control method of supply unit of the present invention; On the basis of technical scheme shown in Figure 9; Present embodiment can also comprise second current detector and second switch power pack, and this second switch power pack can comprise at least one Switching Power Supply branch road; Be with the difference of technical scheme shown in Figure 9, can also comprise the steps: between step 104 and the step 105

Second current detector that the road is connected of closing of the output of step 121, input and linear power supply branch road and at least two Switching Power Supply branch roads of the first Switching Power Supply group detects this and closes the electric current on road; This electric current that closes the road is converted into detection signal, exports this detection signal.

Preferably, second current detector can also comprise and amplifying and filter circuit, and the electric current that closes the road that detects is converted into voltage, and amplification, filtering choose the voltage of proper frequency section, exports this voltage.Alternatively, second current detector can also comprise amplification and filter circuit, with the electric current that the electric current that closes the road amplifies, the proper frequency section is chosen in filtering that detects, exports this electric current.

In the present embodiment, each Switching Power Supply branch road of second switch power pack can comprise that a stagnant ring controller and a Switching Power Supply drive and power circuit, can comprise the steps: after the step 121

Each stagnant ring controller of the second switch power pack that step 122, input are connected with the output of second current detector is according to the detection signal of its control window and the output of second current detector; Adopt preset multistage stagnant ring control strategy, the output corresponding control signal;

Preferably; Each stagnant ring controller the detection signal of second current detector output trigger this its control window in limited time; The output corresponding control signal, is exported corresponding control signal in limited time on voltage triggered this its control window of exporting at second current detector;

Each Switching Power Supply of the second switch power pack that step 123, input and the corresponding connection of output, output and the He Lu of each stagnant ring controller of second switch power pack are connected in parallel drive and power circuit under the control of the control signal of corresponding stagnant ring controller output, the output current of the respective switch power branch of control second switch power pack.

Step 105 specifically can be following steps:

Step 124, linear power supply branch road are according to the output current and the load current of at least one Switching Power Supply branch road of at least two Switching Power Supply branch roads of the first Switching Power Supply group, second switch power pack, and electric current affords redress.

In the present embodiment, the control window width of each stagnant ring controller can be identical or different, and space, adjacent or overlapping.

In the present embodiment, comprise two groups of Switching Power Supplies: the first Switching Power Supply group and second switch power pack, the first Switching Power Supply group is through detecting the output current of linear power branch; Adopt many hysteresis control method thereofs; Control its output current, the second switch power pack detects the summation of the output current of the first Switching Power Supply group and linear power supply branch road, adopts many hysteresis control method thereofs; Control its output current, realize total improved efficiency.

Shown in figure 12, the structural representation of an embodiment who provides for power amplifier device of the present invention can comprise power amplifier 131 and supply unit 132.Supply unit 132 is used for receiving inputted signal, and according to input signal, the output voltage of control supply unit 132 adopts preset multimachine to stagnate and encircles control strategy, the output current of control supply unit 132.Power amplifier 131 is used under the control of the output voltage of supply unit 132 outputs and output current, amplification input signal.

In this example; Supply unit 132 can also comprise a linear power supply branch road 21, first current detector 22 and one first Switching Power Supply group 20; The first Switching Power Supply group 20 can comprise at least two Switching Power Supply branch roads: Switching Power Supply branch road 201, Switching Power Supply branch road 202 ... Switching Power Supply branch road 20N, N is equal to or greater than 2.Switching Power Supply branch road 201 can comprise that the ring controller 2011 that stagnates drives and power circuit 2012 with Switching Power Supply.Switching Power Supply branch road 202 can comprise that the ring controller 2021 that stagnates drives and power circuit 2022 with Switching Power Supply.And the like, Switching Power Supply branch road 20N can comprise stagnate ring controller 20N1 and Switching Power Supply driving and power circuit 20N2.The input of first current detector 22 is connected with the output of linear power supply branch road 21; Switching Power Supply driving and power circuit 2012, Switching Power Supply driving and power circuit 2022 ... Switching Power Supply drives and the input of power circuit 20N2 is connected with the output of first current detector 22, and the output of output and linear power supply branch road 21 is connected in parallel.

Present embodiment adopts multistage stagnant ring control; Adjust the output current of supply unit through the first Switching Power Supply group 20; Make it further improve tracking accuracy and speed; Make the output current of supply unit and the dynamic error of load current reduce, thereby reduce the output current of linear power supply branch road, the power output of minimizing linear power supply branch road.Thereby improved the whole efficiency of ET power amplifier.

Need to prove that the invention described above embodiment can be applied to any needs the occasion of following voltage is provided.

Those of ordinary skills can recognize; The unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein; Can realize with electronic hardware, computer software or the combination of the two; For the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in above-mentioned explanation.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each certain applications, but this realization should not thought and exceeds scope of the present invention.

The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to carry out, perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.

What should explain at last is: above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although the present invention is specified with reference to preferred embodiment; Those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and the scope of technical scheme of the present invention.

Claims

1. supply unit; It is characterized in that; Comprise linear power supply branch road, first current detector and the first Switching Power Supply group; The input of said first current detector is connected with the output of said linear power supply branch road; The said first Switching Power Supply group comprises at least two Switching Power Supply branch roads, and said Switching Power Supply branch road comprises stagnate ring controller and Switching Power Supply driving and power circuit, and the input of said stagnant ring controller is connected with the output of said first current detector; Said Switching Power Supply drives and the input of power circuit is connected with the output of said stagnant ring controller, and the said Switching Power Supply driving and the output of power circuit and the output of said linear power supply branch road are connected in parallel; Wherein:

2. supply unit according to claim 1; It is characterized in that; Also comprise second current detector and second switch power pack, the input of said second current detector is connected with the output of said linear power supply branch road and the road of closing of the output of two Switching Power Supply branch roads of the said first Switching Power Supply group at least:

Said second current detector is used to detect the said electric current that closes the road, and the said electric current that closes the road is converted into detection signal, exports said detection signal;

Said second switch power pack comprises at least one Switching Power Supply branch road; Said Switching Power Supply branch road comprises stagnate ring controller and Switching Power Supply driving and power circuit; The input of said stagnant ring controller is connected with the output of said second current detector; Said Switching Power Supply drives and the input of power circuit is connected with the output of said stagnant ring controller, and said Switching Power Supply drives and the output and the said road of closing of power circuit are connected in parallel, wherein:

Said stagnant ring controller is used for the detection signal according to the control window of said stagnant ring controller and the output of said second current detector, adopts preset multistage stagnant ring control strategy, the output control signal;

Said Switching Power Supply drives and power circuit is used under the control of the control signal that this stagnant ring controller is exported, controlling the output current of this Switching Power Supply branch road;

Said linear power supply branch road also is used for output current and the load current according at least one Switching Power Supply branch road of at least two Switching Power Supply branch roads of the said first Switching Power Supply group, said second switch power pack, and electric current affords redress.

3. supply unit according to claim 1 is characterized in that, the control window width of each stagnant ring controller of the said first Switching Power Supply group is identical or different; The control window space of each stagnant ring controller of the said first Switching Power Supply group, adjacent or overlapping.

4. supply unit according to claim 2 is characterized in that, the control window width of each stagnant ring controller of said second switch power pack is identical or different; The control window space of each stagnant ring controller of said second switch power pack, adjacent or overlapping.

5. supply unit according to claim 1 is characterized in that, the Switching Power Supply branch road of the said first Switching Power Supply group comprises main switch power branch and forward compensated switching power supply branch road;

Said main switch power branch comprises main ring controller and main switch power drives and the power circuit of stagnating, and said forward compensated switching power supply branch road comprises that stagnant ring controller of forward compensation and forward compensated switching power supply drive and power circuit;

Wherein, The upper limit of the control window of the upper limit of the control window of the stagnant ring controller of said master and the stagnant ring controller of said forward compensation is greater than zero, and the lower limit of the control window of the stagnant ring controller of said master is less than or equal to the lower limit that said forward compensates the control window of the ring controller that stagnates;

The stagnant ring controller of said master is used for adopting preset multistage stagnant ring control strategy according to the control window of the stagnant ring controller of said master and the detection signal of said first current detector output, exports control signal;

Said main switch power drives and power circuit are used under the control of the control signal of the stagnant ring controller output of said master, main output current being provided;

The stagnant ring controller of said forward compensation is used for adopting the multistage stagnant ring control strategy of presetting, the output control signal according to the control window of the stagnant ring controller of said forward compensation and the detection signal of said first current detector output;

Said forward compensated switching power supply drives and power circuit is used under the control of the control signal that the stagnant ring controller of said forward compensation is exported, the forward offset current being provided.

6. supply unit according to claim 1 is characterized in that, the Switching Power Supply branch road of the said first Switching Power Supply group comprises main switch power branch and negative sense compensated switching power supply branch road;

Said main switch power branch comprises main ring controller and main switch power drives and the power circuit of stagnating, and said negative sense compensated switching power supply branch road comprises that stagnant ring controller of negative sense compensation and negative sense compensated switching power supply drive and power circuit;

Wherein, the upper limit of the control window of the stagnant ring controller of said master is greater than zero, and the lower limit of the control window of the stagnant ring controller of said negative sense compensation is less than zero;

The stagnant ring controller of said negative sense compensation is used for adopting the multistage stagnant ring control strategy of presetting, the output control signal according to the control window of the stagnant ring controller of said negative sense compensation and the detection signal of said first current detector output;

Said negative sense compensated switching power supply branch road is used under the control of the control signal of the stagnant ring controller output of said negative sense compensation, the negative sense offset current being provided.

7. the control method of a supply unit; It is characterized in that; Be applied in the supply unit that comprises linear power supply branch road, first current detector and the first Switching Power Supply group; The said first Switching Power Supply group comprises at least two Switching Power Supply branch roads, and said Switching Power Supply branch road comprises stagnate ring controller and Switching Power Supply driving and power circuit; The input of said first current detector is connected with the output of said linear power supply branch road; The input of said stagnant ring controller is connected with the output of said first current detector; Said Switching Power Supply drives and the input of power circuit is connected with the output of said stagnant ring controller, and the said Switching Power Supply driving and the output of power circuit and the output of said linear power supply branch road are connected in parallel; This method comprises:

8. method according to claim 7; It is characterized in that; Said supply unit also comprises second current detector and second switch power pack; The input of said second current detector is connected with the output of said linear power supply branch road and the road of closing of the output of two Switching Power Supply branch roads of the said first Switching Power Supply group at least; Said second switch power pack comprises at least one Switching Power Supply branch road, and said Switching Power Supply branch road comprises stagnate ring controller and Switching Power Supply driving and power circuit, and the input of said stagnant ring controller is connected with the output of said second current detector; Said Switching Power Supply drives and the input of power circuit is connected with the output of said stagnant ring controller, and said Switching Power Supply drives and the output and the said road of closing of power circuit are connected in parallel; Said method also comprises:

Said second current detector detects the said electric current that closes the road, and the said electric current that closes the road is converted into detection signal, exports said detection signal;

Said stagnant ring controller adopts preset multistage stagnant ring control strategy, the output control signal according to the control window of the ring controller that should stagnate and the detection signal of said second current detector output;

Said Switching Power Supply driving and power circuit are controlled the output current of said Switching Power Supply branch road under the control of the control signal of said stagnant ring controller output;

Said linear power supply branch road is according to the output current and the load current of at least two Switching Power Supply branch roads of the said first Switching Power Supply group; The electric current that affords redress comprises: said linear power supply branch road is according to the output current and the load current of at least one Switching Power Supply branch road of at least two Switching Power Supply branch roads of the said first Switching Power Supply group, said second switch power pack, and electric current affords redress.

9. method according to claim 7 is characterized in that, said at least two Switching Power Supply branch roads of the said first Switching Power Supply group comprise main switch power branch and forward compensated switching power supply branch road;

Said master stagnates ring controller according to the control window of the stagnant ring controller of said master and the detection signal of said first current detector output; Adopt preset multistage stagnant ring control strategy; The output control signal; Said main switch power drives and power circuit provide main output current under the control of the control signal of the stagnant ring controller output of said master;

Said forward compensation stagnates ring controller according to the control window of the stagnant ring controller of said forward compensation and the detection signal of said first current detector output; Adopt preset multistage stagnant ring control strategy; The output control signal; Said forward compensated switching power supply driving and power circuit provide the forward offset current under the control of the control signal of the stagnant ring controller output of said forward compensation.

10. method according to claim 7 is characterized in that, said at least two Switching Power Supply branch roads of the said first Switching Power Supply group comprise main switch power branch and negative sense compensated switching power supply branch road;

Wherein, the upper limit of the control window of the stagnant ring controller of said master is greater than zero, and the lower limit of the triggering control window of the stagnant ring controller of said negative sense compensation is less than zero;

Said negative sense compensation stagnates ring controller according to the control window of the stagnant ring controller of said negative sense compensation and the detection signal of said first current detector output; Adopt preset multistage stagnant ring control strategy; The output control signal; Said negative sense compensated switching power supply driving and power circuit provide the negative sense offset current under the control of the control signal of the stagnant ring controller output of said negative sense compensation.

11. power amplifier device; Comprise power amplifier and supply unit, it is characterized in that said supply unit is used for receiving inputted signal; According to said input signal; Control the output voltage of said supply unit, adopt preset multistage stagnant ring control strategy, control the output current of said supply unit;

Said power amplifier is used under the control of said output voltage and said output current, amplifying said input signal;

Said supply unit; Comprise linear power supply branch road, first current detector and the first Switching Power Supply group; The input of said first current detector is connected with the output of said linear power supply branch road; The said first Switching Power Supply group comprises at least two Switching Power Supply branch roads; Each Switching Power Supply branch road comprises stagnate ring controller and Switching Power Supply driving and power circuit; The input of said stagnant ring controller is connected with the output of said first current detector, and said Switching Power Supply drives and the input of power circuit is connected with the output of said stagnant ring controller, and the said Switching Power Supply driving and the output of power circuit and the output of said linear power supply branch road are connected in parallel; Wherein:

Said linear power supply branch road is used for receiving inputted signal, according to said input signal, and the output voltage of control supply unit, according to the output current and the load current of said at least two Switching Power Supply branch roads, electric current affords redress;