CN101170780B - Method for dual mode terminal to prevent from current backflow between two radio modules - Google Patents
Method for dual mode terminal to prevent from current backflow between two radio modules Download PDFInfo
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- CN101170780B CN101170780B CN2007101879849A CN200710187984A CN101170780B CN 101170780 B CN101170780 B CN 101170780B CN 2007101879849 A CN2007101879849 A CN 2007101879849A CN 200710187984 A CN200710187984 A CN 200710187984A CN 101170780 B CN101170780 B CN 101170780B
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Abstract
The invention discloses a method for preventing electric current backflow between two wireless modules in a dual mode terminal and a device thereof. The two wireless modules include a master wireless module and a slave wireless module. The method comprises (1) equipping a control module between the two wireless modules of the dual mode terminal; (2) controlling the operating state or turn-off state of the control module by the master wireless module according to the standby state of the dual mode terminal. Compared with the solution using software in the prior art, although the cost of the dual mode terminal is slightly increased, the invention is more stable than the solution using software from the product reliability point of view, and can prevent electric current backflow between two wireless modules in the dual mode terminal.
Description
Technical field
The present invention relates to prevent the method and apparatus that electric current pours in down a chimney in the dual-mode terminal of moving communicating field, specifically, relate to and prevent implementation method and the device thereof that electric current pours in down a chimney between two wireless modules in a kind of dual-mode terminal in this field.
Background technology
Present dual-mode terminal generally all comprises two wireless modules of principal and subordinate, carries out communication by control signal and data-interface between two wireless modules.For two wireless modules of interface level compatibility, common way is that employing control signal and data-interface are direct-connected, and the benefit of doing like this is that circuit is simple.But also bring simultaneously a problem: when dual-mode terminal had only main wireless module work, direct-connected interface signal may cause from main wireless module to pouring in down a chimney even device failure from the wireless module electric current.Because the bimodulus interface level of main wireless module may be height in some cases, and the signal of this high level is directly to be connected in from the wireless module, but the wireless module of closing hereto will occur that power supply has been closed also has the situation of signal on the peripheral interface.This situation can cause electric current to pour in down a chimney on the one hand, increases the complete machine operating current of dual-mode terminal, reduces stand-by time; On the other hand, the peripheral interface level is higher than supply voltage, and this also is an inducement that triggers the cmos device breech lock, and in a single day the breech lock damage takes place cmos device, and consequence can be very serious.
General dual-mode terminal framework in the prior art as shown in Figure 1, comprises 2 wireless modules, module 1 and module 2, and wherein module 1 is to play a major role, module 1 is at first to power on and in running order all the time module in dual-mode terminal.Interface between module 1 and the module 2 comprises control signal, and the port that is used to transmit data, as asynchronous serial port.Control signal is a series of " shaking hands " signal that is used to guarantee the correct transmission of data, and asynchronous serial port is the interface that is used for transmission authentic data signal between two wireless modules.What the content of no matter transmitting is, the interface signal between the wireless module can be divided into two kinds according to transmission direction, and a kind of is from module 1 to module 2, is summarised as signal A; Another is from module 2 to module 1, is summarised as signal B, as shown in Figure 1.
As shown in Figure 1, when the module 1 of dual-mode terminal and module 2 were all in running order, module 1 and module 2 can guarantee that by normally disposing the input/output state of bimodulus interface signal electric current not occurring between module 1 and the module 2 pours in down a chimney; But when having only module 1 to be in the stand-by operation state, when module 2 is in closed condition, because module can't be carried out effective input and output control to the bimodulus interface signal 2 this moments, if this moment, module 1 be because a variety of causes also can't carry out effective and correct input and output control to the bimodulus interface signal, just may cause from module 1 to module 2 electric current to pour in down a chimney problem.
The solution of this problem being evaded from the angle of software is arranged at present, but software flow is handled upward more complicated, need constantly change the interface level setting, increases the workloads of a lot of debugging, and unfavorable for stablizing of software version.And for the system of the such more complicated of dual-mode terminal, unpredictable abnormality may appear in software, and in this state, software itself has no idea the dual-mode terminal interface signal to be carried out effectively and proper configuration again.
Summary of the invention
Technical problem solved by the invention is to provide the method that prevents in a kind of dual-mode terminal that electric current pours in down a chimney between two wireless modules, prevents the problem that electric current pours in down a chimney between two wireless modules to solve in the dual-mode terminal.
In order to address the above problem, the invention provides the method that prevents in a kind of dual-mode terminal that electric current pours in down a chimney between two wireless modules, described two wireless modules are respectively main wireless module and from wireless module, it is characterized in that, may further comprise the steps:
(1) between two wireless modules of described dual-mode terminal, a control module is set;
(2) according to the ideal case of described dual-mode terminal, described main wireless module is controlled the operating state or the closed condition of described control module;
Wherein, described step (2) comprising:
When two wireless modules of described dual-mode terminal all were in standby, it is in running order that described main wireless module sends the described control module of signal controlling;
When described dual-mode terminal when wireless module is in standby, it is in running order that described main wireless module sends the described control module of signal controlling;
When the main wireless module of having only of described dual-mode terminal was in standby, described main wireless module sent the described control module of signal controlling and is in closed condition.
Method of the present invention, wherein, described control module is bus driver device or analog switch.
Adopt the method for the invention to compare with the software solution of prior art, though on the cost of dual-mode terminal, can slightly increase, but angle from product reliability, solution than software is more stable, has solved the problem that prevents in the dual-mode terminal that electric current pours in down a chimney between two wireless modules.
Description of drawings
Fig. 1 is the interface block diagram between two wireless modules in the present invention's common dual-mode terminal described in the prior art;
Fig. 2 is the device interface block diagram that prevents in the dual-mode terminal described in the embodiment of the invention that electric current pours in down a chimney between two wireless modules;
Fig. 3 is the method flow diagram that prevents in the dual-mode terminal described in the embodiment of the invention that electric current pours in down a chimney between two wireless modules.
Embodiment
The present invention provides the method and apparatus that prevents in a kind of dual-mode terminal that electric current pours in down a chimney between two wireless modules here, to realize preventing the problem that electric current pours in down a chimney between two wireless modules in the dual-mode terminal.Below embodiment is described in detail, but not as a limitation of the invention.
Prevent the method that electric current pours in down a chimney between two wireless modules in the dual-mode terminal of the present invention, step is as shown in Figure 3:
Prevent the device that electric current pours in down a chimney between two wireless modules in the dual-mode terminal of the present invention, particular content as shown in Figure 2, the present invention has increased to be connected this device of two control modules 3 between the wireless module between original two wireless modules, and this control module 3 is in main wireless module 1 and from the path of wireless module 2 interface signals; The effect of described control module 3 is to guarantee the transmission direction of signal, for example transfer to from the signal of wireless module 2 from main wireless module 1, increased after the described control module 3, the software of dual-mode terminal only needs the docking port signal to carry out effective configuration one time, just can guarantee under any operating state, the reverse transfer from wireless module 2 to main wireless module 1 can not occur, the software of dual-mode terminal does not need to do extra processing again.In like manner, also be the same from the signal that is transferred to main wireless module 1 from wireless module 2.
Wherein, described control module 3 has work and closes two states, when described control module 3 is operating state, is used to realize that main wireless module 1 is connected with signal from wireless module 2; When described control module 3 is in closed condition, is used to cut off main wireless module 1 and connects from the signal between the wireless module 2.Here control module 3 work and closing state are controlled realization by main wireless module 1 by signal C.
In embodiment of the present invention, the software of dual-mode terminal only need carry out once fixing effective configuration (as the input and output attribute) to the bimodulus interface signal and get final product, and in software running process, does not need to do any change.For example, as shown in Figure 2, for being transferred to from the signal of wireless module 2 from main wireless module 1, signal A1 should be configured to output attribute in main wireless module 1 side; Signal A2 should be configured to input attributes from wireless module 2 sides, and suitably provides and draw or drop-down initial value.In like manner, also do similar processing from the signal that is transferred to main wireless module 1 from wireless module 2.Signal will pass to input from output normally like this, electric current can not occur and pour in down a chimney.Advantage of the present invention promptly is embodied in the simple and practical of this configuration.Below be the work of described control module 3 and the concrete operations situation of closing two states:
When dual-mode terminal is in two standby, main wireless module 1 and all in running order from wireless module 2, signal C control by main wireless module 1, make that control module 3 is in running order, guarantee main wireless module 1 and, be used to satisfy the data communication between them from the connection of the interface signal between the wireless module 2.Main wireless module 1 and all in running order this moment from wireless module 2, the bimodulus interface signal configuration according to fixing the phenomenon that electric current pours in down a chimney can not occur, described control module 3 bringing into play connect and (or) effect that drives;
When dual-mode terminal is in from the independent standby of wireless module 2, because main wireless module 1 is a main control module, so this moment, main wireless module 1 also was work, therefore described control module 3 is identical with the situation of two standbies, in running order, its bringing into play connect and (or) effect that drives;
When dual-mode terminal is in main wireless module 1 standby, be in closed condition from wireless module 2, as the description in the background technology, this situation may occur pouring in down a chimney situation by main wireless module 1 to the electric current from wireless module 2, signal C control by main wireless module 1, make described control module 3 be in closed condition,, can play effect the bimodulus interface signal thoroughly cuts off or high-impedance state is isolated according to the device difference of described control module 3 actual selection; Prevent the phenomenon of pouring in down a chimney to electric current from wireless module 2 from main wireless module 1;
Wherein, described control module 3 concrete implementations can be that bus driver device or analog switch or other play the device of same function, specifically can select according to the factors such as number of interface signal.In above-mentioned embodiment, if described control module 3 is bus driver devices, then it plays be high-barrier from effect; If described control module 3 is analog switches, what then it played is the effect of thorough shutoff signal.
The described method and apparatus of the embodiment of the invention, compare with the software solution of prior art, though on the cost of dual-mode terminal, can slightly increase, but angle from product reliability, solution than software is more stable, has solved the problem that prevents in the dual-mode terminal that electric current pours in down a chimney between two wireless modules.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (2)
1. prevent the method that electric current pours in down a chimney between two wireless modules in a dual-mode terminal, described two wireless modules are respectively main wireless module and from wireless module, it is characterized in that, may further comprise the steps:
(1) between two wireless modules of described dual-mode terminal, a control module is set;
(2) according to the ideal case of described dual-mode terminal, described main wireless module is controlled the operating state or the closed condition of described control module;
Wherein, described step (2) comprising:
When two wireless modules of described dual-mode terminal all were in standby, it is in running order that described main wireless module sends the described control module of signal controlling;
When described dual-mode terminal when wireless module is in standby, it is in running order that described main wireless module sends the described control module of signal controlling;
When the main wireless module of having only of described dual-mode terminal was in standby, described main wireless module sent the described control module of signal controlling and is in closed condition.
2. the method for claim 1 is characterized in that, described control module is bus driver device or analog switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101879849A CN101170780B (en) | 2007-11-15 | 2007-11-15 | Method for dual mode terminal to prevent from current backflow between two radio modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101879849A CN101170780B (en) | 2007-11-15 | 2007-11-15 | Method for dual mode terminal to prevent from current backflow between two radio modules |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101170780A CN101170780A (en) | 2008-04-30 |
| CN101170780B true CN101170780B (en) | 2011-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101879849A Expired - Fee Related CN101170780B (en) | 2007-11-15 | 2007-11-15 | Method for dual mode terminal to prevent from current backflow between two radio modules |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159941B (en) * | 2007-11-08 | 2010-12-08 | 中兴通讯股份有限公司 | Multimode terminal and method of eliminating return current influence of current |
| CN102053567B (en) * | 2010-10-19 | 2013-03-13 | 北京星网锐捷网络技术有限公司 | Safety power-on time sequence control circuit system |
| CN112235010A (en) * | 2020-09-16 | 2021-01-15 | 高新兴物联科技有限公司 | Wireless module |
| CN113050786A (en) * | 2021-03-17 | 2021-06-29 | 高创(苏州)电子有限公司 | Standby system and display equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5737703A (en) * | 1994-12-23 | 1998-04-07 | Nokia Mobile Phones Limited | Multi-mode radio telephone which executes handover between different system |
| CN1367629A (en) * | 2001-01-20 | 2002-09-04 | 三星电子株式会社 | Electric efficiency raising circuit of radio-frequency power amplifier in double-mode mobile telephone |
| CN1549647A (en) * | 2003-05-09 | 2004-11-24 | 乐金电子（中国）研究开发中心有限公 | Double- mode diplex for mobile communication terminal |
| CN2792031Y (en) * | 2005-09-20 | 2006-06-28 | 宇龙计算机通信科技(深圳)有限公司 | Dual-mode mobile terminal |
| CN2842941Y (en) * | 2005-11-16 | 2006-11-29 | 中兴通讯股份有限公司 | GSM/PHS double-mode submachine series interface debugging information output control circuit |
-
2007
- 2007-11-15 CN CN2007101879849A patent/CN101170780B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5737703A (en) * | 1994-12-23 | 1998-04-07 | Nokia Mobile Phones Limited | Multi-mode radio telephone which executes handover between different system |
| CN1367629A (en) * | 2001-01-20 | 2002-09-04 | 三星电子株式会社 | Electric efficiency raising circuit of radio-frequency power amplifier in double-mode mobile telephone |
| CN1549647A (en) * | 2003-05-09 | 2004-11-24 | 乐金电子（中国）研究开发中心有限公 | Double- mode diplex for mobile communication terminal |
| CN2792031Y (en) * | 2005-09-20 | 2006-06-28 | 宇龙计算机通信科技(深圳)有限公司 | Dual-mode mobile terminal |
| CN2842941Y (en) * | 2005-11-16 | 2006-11-29 | 中兴通讯股份有限公司 | GSM/PHS double-mode submachine series interface debugging information output control circuit |
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