EP1445983A2 - Device for transmitting and receiving data for remote controlling hearing aids - Google Patents
Device for transmitting and receiving data for remote controlling hearing aids Download PDFInfo
- Publication number
- EP1445983A2 EP1445983A2 EP04000633A EP04000633A EP1445983A2 EP 1445983 A2 EP1445983 A2 EP 1445983A2 EP 04000633 A EP04000633 A EP 04000633A EP 04000633 A EP04000633 A EP 04000633A EP 1445983 A2 EP1445983 A2 EP 1445983A2
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- European Patent Office
- Prior art keywords
- coil
- receiving
- transmission
- receiver
- capacitor
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/273—Adaptation for carrying or wearing by persons or animals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/08—Helical antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
- H01Q7/08—Ferrite rod or like elongated core
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
- H04R25/558—Remote control, e.g. of amplification, frequency
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
- H04R2225/51—Aspects of antennas or their circuitry in or for hearing aids
Definitions
- the present invention relates to a device for transmission and receiving data for remote controls of hearing aids with a transmitting device which has a transmitting coil, for sending data and a receiving device, the one Receiving coil for receiving data.
- Such a device is from the document DE 201 14 461 known. It serves as a sending and / or receiving unit for a hearing aid for wireless data transmission between the hearing aid and at least one external device.
- a sending and / or receiving unit for a hearing aid for wireless data transmission between the hearing aid and at least one external device.
- several transmitting and / or receiving coils are different Aligned spatial directions.
- Transponder antenna devices are known in which several Coils are used that are magnetically closely coupled are. Two or more coils are attached to one common core are arranged for data transmission used.
- Coils are preferably used for the long-wave range because is mainly transmitted inductively in the long-wave range. Sufficiently strong fields must be used for inductive transmission be generated.
- Coils with are particularly possible for the receiving circuit many turns necessary to get as much tension out to produce relatively weak fields. Such coils but are used as transmitter coils to generate strong fields low supply voltages particularly unsuitable. This problem occurs particularly with radio connections between two devices on when relatively low frequencies in Range of preferably 50 to 500 kHz can be used.
- Radio remote control For sufficiently long ranges of radio remote controls Correspondingly strong transmission fields are necessary. Should the radio remote control will also be designed to receive data another coil or winding for the Reception needed. Such a receiving coil is from heavily overdriven the field of the transmitter coil. This structure can lead to destruction of the receiver input stage without protection.
- the object of the present invention is therefore with limited supply voltage available a device for sending and receiving data for remote controls of hearing aids to propose the transmission power is sufficiently high.
- this object is achieved by a device for sending and receiving data for remote controls of hearing aids with a transmitting device that has a transmitting coil has, for sending data and a receiving device, which has a receiving coil for receiving Data, the transmitter coil and the receiver coil have a common one Own core so that the receiving coil for sending is excitable by the transmitter coil.
- the receiving coils generally have significantly higher numbers of turns than the transmitter coils can have without additional technical effort generated very strong broadcast fields are available, although only very low operating voltages stand. Therefore, no additional voltage multiplier needed, or batteries with less voltage is used, or less Batteries can be connected in series. This can also be done Save space or installation space.
- transmitter and receiver coil on one core is ultimately cheaper to manufacture than two completely separate ones Do the washing up.
- the receiving device can have a receiver, from which the receiving coil is separated by a protective circuit becomes. This should be done to the recipient protect excessive voltages caused by the transformer action can come from the transmitting and receiving coil.
- the protective circuit preferably consists of a capacitor and a parallel connection connected in series two anti-parallel diodes. This prevents the receiver, at whose input the diode parallel connection voltage is too high.
- the receiving and transmitting devices are preferably for designed for a frequency range from 50 to 200 kHz. This Frequency range is approved for remote controls.
- the receiving device can have a receiving resonant circuit, wherein the receiving coil forms the voice coil.
- the receiving resonant circuit is thus used in particular as a transmission power amplifier used.
- the receiving device should have a correction capacitor Have correction of the natural frequency of the receiving resonant circuit. This allows the frequency changes that caused by the inductances of the transmitter coils, compensate.
- the protective capacitor is favorably from the protective circuit simultaneously as a correction capacitor used, so that another component can be saved can.
- the transmitter is 1 equipped with one or more transmitter coils 2.
- the Transmitting coils are via a common core 3 with a receiving coil 4 coupled.
- a Resonant circuit capacitor 5 In parallel to the receiving coil is a Resonant circuit capacitor 5 connected.
- the diodes 7 and 8 connected in parallel are connected to the input of a receiver 9.
- the mode of operation of this circuit is described in more detail below explained.
- the separate receiving coil 4, which is necessary anyway is wound on the same core on which the Transmitter coils 2 are located.
- the receiving coil 4 the with its associated capacitor 5 a complete resonant circuit represents through the transmitter coils 2 also to Swing excited. Since the receiving coil 4 compared to the transmitter coils has 2 more turns, are in the receiving resonant circuit 4, 5 relatively high during the transmission process Tensions generated by the vibration effect of the Resonant circuit despite the many turns right again generate high currents. Deliver the actual transmitter coils 2 now only the radiated energy. Therefore needs not so much current to flow through these coils. The strong transmission field is now affected by the transmission coils 2 excited receiving coil 4 generated.
- the frequency is absolutely stable and can be specified from the outside. tolerances the components in the resonant circuits have no influence to the transmission frequency. They only act in a certain way Measure of the efficiency of the transmitter 1.
- the inductances of the transmitter coils 2 change the Inductance of the coupled receiving coil 4, so that the natural frequency of the resonant circuit 4, 5 after changing the associated Capacitance value of the resonant circuit capacitor 5 corrected must become.
- the inductance of the resonant circuit is smaller, i.e. the capacity of the resonant circuit must be increased become. A suitable capacity can do so without problems can be connected in such a way that they also protect the sensitive receiver input level 9 is used. Because one Protection circuit 6, 7, 8 would have been needed anyway this circuit solution without additional components.
- the Protection circuit 6, 7, 8 consists only of the correction capacitor 6 and two diodes 7 and 8 connected in anti-parallel, the parallel to the capacitor 5 of the receiver resonant circuit are connected.
- the receive signals are on the diodes 7, 8 tapped.
- Voltages of typically around 50 volts go through the diodes 7, 8 in the conductive state and thus switch them upstream capacitor 6 parallel to the resonant circuit capacitor 5 of the reception group. So that the resonance frequency of the resonant circuit 4, 5 corrected for transmission.
- the signals at the input of the high-impedance Receiver limited by the diodes 7, 8 to a maximum of about 0.7 volts. Most of the voltage generated by the resonant circuit drops then on the protective capacitor 6.
- reception signals are so small that block the diodes 7, 8.
- the voltages of the received signals typically reach at most the mV range. Thereby only the original resonant circuit capacitor 5 is still active.
- the transmitter coils 2 are switched off. The That is, at least one connection of each transmitter coil 2 is open. So that they do not affect the receiving resonant circuit 4, 5 more out. So it can on its reception frequency, on the he is tuned to swing freely.
- the signal is almost without losses through the protection or correction capacitor 6 transmitted to the protective diodes 7, 8 further. Because of the low reception voltage, these diodes 7, 8 blocked. That the receive voltage can be at the diode connections completely removed from the high-resistance receiver input become.
- reception coil is used as a transmission amplifier
- the protective capacitor also serves as a correction capacitor
Abstract
Description
Die vorliegende Erfindung betrifft eine Vorrichtung zum Senden und Empfangen von Daten für Fernbedienungen von Hörgeräten mit einer Sendeeinrichtung, die eine Sendespule aufweist, zum Senden von Daten und einer Empfangseinrichtung, die eine Empfangsspule aufweist, zum Empfangen von Daten.The present invention relates to a device for transmission and receiving data for remote controls of hearing aids with a transmitting device which has a transmitting coil, for sending data and a receiving device, the one Receiving coil for receiving data.
Eine derartige Vorrichtung ist aus der Druckschrift DE 201 14 461 bekannt. Sie dient als Sende- und/oder Empfangseinheit für ein Hörgerät zur drahtlosen Datenübertragung zwischen dem Hörgerät und wenigstens einem externen Gerät. Dabei sind mehrere Sende- und/oder Empfangsspulen in unterschiedliche Raumrichtungen ausgerichtet.Such a device is from the document DE 201 14 461 known. It serves as a sending and / or receiving unit for a hearing aid for wireless data transmission between the hearing aid and at least one external device. Here, several transmitting and / or receiving coils are different Aligned spatial directions.
Darüber hinaus sind aus der Druckschrift DE 44 31 446 Transponder-Antennenvorrichtungen bekannt, bei denen mehrere Spulen eingesetzt werden, die miteinander magnetisch eng gekoppelt sind. Dabei werden zwei oder mehr Spulen, die an einem gemeinsamen Kern angeordnet sind, zur Datenübertragung verwendet.In addition, from document DE 44 31 446 Transponder antenna devices are known in which several Coils are used that are magnetically closely coupled are. Two or more coils are attached to one common core are arranged for data transmission used.
Zum Senden und Empfangen von Signalen in Transceivern werden für den Langwellenbereich vorzugsweise Spulen verwendet, da im Langwellenbereich überwiegend induktiv übertragen wird. Für die induktive Übertragung müssen ausreichend starke Felder erzeugt werden.For sending and receiving signals in transceivers Coils are preferably used for the long-wave range because is mainly transmitted inductively in the long-wave range. Sufficiently strong fields must be used for inductive transmission be generated.
Es ist technisch schwierig, einen von außen mit fester Frequenz zwangserregten Sendeschwingkreis mit ausreichender Sendeleistung zu realisieren, wenn nur sehr niedrige Versorgungsspannungen zur Verfügung stehen, wie dies beispielsweise in den Fernbedienungen von Hörgeräten der Fall ist. Für ein starkes Feld wird einerseits eine Spule mit vielen Windungen benötigt, um eine ausreichende Feldstärke zu erreichen. Andererseits haben solche Spulen eine entsprechend hohe Induktivität und damit auch einen entsprechend hohen Wechselstromwiderstand. Dadurch wird der Strom, der durch die Spule geschickt werden kann, stark reduziert, da sich der maximale Strom durch die Spule aus dem Quotienten von Versorgungsspannung und Wechselstromwiderstand ergibt.It is technically difficult to get one from the outside with a fixed frequency positively excited resonant circuit with sufficient transmission power to be realized if only very low supply voltages are available, such as this is the case in the remote controls of hearing aids. For a On the one hand, a strong field becomes a coil with many turns needed to achieve sufficient field strength. on the other hand such coils have a correspondingly high inductance and therefore also a correspondingly high AC resistance. This is the current that is sent through the coil can be greatly reduced since the maximum Current through the coil from the quotient of supply voltage and gives AC resistance.
Insbesondere für den Empfangskreis sind Spulen mit möglichst vielen Windungen notwendig, um möglichst viel Spannung aus relativ schwachen Feldern zu erzeugen. Gerade solche Spulen sind aber als Sendespulen zur Erzeugung starker Felder bei niedrigen Versorgungsspannungen besonders schlecht geeignet. Dieses Problem tritt ganz besonders bei Funkverbindungen zwischen zwei Geräten auf, wenn relativ geringe Frequenzen im Bereich von vorzugsweise 50 bis 500 kHz verwendet werden.Coils with are particularly possible for the receiving circuit many turns necessary to get as much tension out to produce relatively weak fields. Such coils but are used as transmitter coils to generate strong fields low supply voltages particularly unsuitable. This problem occurs particularly with radio connections between two devices on when relatively low frequencies in Range of preferably 50 to 500 kHz can be used.
Für ausreichend hohe Reichweiten von Funkfernbedienungen sind entsprechend starke Sendefelder notwendig. Soll die Funkfernbedienung auch zum Empfang von Daten ausgelegt sein, wird außerdem eine weitere Spule oder eine weitere Wicklung für den Empfang benötigt. Eine derartige Empfangsspule wird aber von dem Feld der Sendespule stark übersteuert. Dieser Aufbau kann ohne Schutz zur Zerstörung der Empfängereingangsstufe führen.For sufficiently long ranges of radio remote controls Correspondingly strong transmission fields are necessary. Should the radio remote control will also be designed to receive data another coil or winding for the Reception needed. Such a receiving coil is from heavily overdriven the field of the transmitter coil. This structure can lead to destruction of the receiver input stage without protection.
Zur Umgehung dieses Problems können freischwingende Schwingkreise verwendet werden, die sich selbst wieder erregen und in denen sich die Spannungen und damit auch die Ströme auf höhere Werte aufschaukeln. Die Schwingkreise schwingen jedoch mit ihrer Resonanzfrequenz und nicht exakt mit der von außen vorgegebenen, gewünschten Frequenz. Alternativ zu dieser Lösung kann die Versorgungsspannung deutlich erhöht werden, um höhere Ströme durch die Sendespule erzwingen zu können.To work around this problem, free-swinging oscillating circuits are used that excite themselves and in which the tensions and thus the currents arise rock higher values. However, the resonant circuits vibrate with their resonance frequency and not exactly with that from the outside predetermined, desired frequency. Alternative to this solution the supply voltage can be increased significantly to to be able to force higher currents through the transmitter coil.
Die Aufgabe der vorliegenden Erfindung besteht somit darin, bei begrenzter zur Verfügung stehender Versorgungsspannung eine Vorrichtung zum Senden und Empfangen von Daten für Fernbedienungen von Hörgeräten vorzuschlagen, bei der die Sendeleistung hinreichend hoch ist.The object of the present invention is therefore with limited supply voltage available a device for sending and receiving data for remote controls of hearing aids to propose the transmission power is sufficiently high.
Erfindungsgemäß wird diese Aufgabe gelöst durch eine Vorrichtung zum Senden und Empfangen von Daten für Fernbedienungen von Hörgeräten mit einer Sendeeinrichtung, die eine Sendespule aufweist, zum Senden von Daten und einer Empfangseinrichtung, die eine Empfangsspule aufweist, zum Empfangen von Daten, wobei die Sendespule und die Empfangsspule einen gemeinsamen Kern besitzen, so dass die Empfangsspule zum Senden durch die Sendespule erregbar ist.According to the invention, this object is achieved by a device for sending and receiving data for remote controls of hearing aids with a transmitting device that has a transmitting coil has, for sending data and a receiving device, which has a receiving coil for receiving Data, the transmitter coil and the receiver coil have a common one Own core so that the receiving coil for sending is excitable by the transmitter coil.
In vorteilhafter Weise brauchen somit erfindungsgemäß nicht zwei voneinander unabhängige Spulen auf zwei Spulenkerne gewickelt zu werden. Es können stattdessen alle benötigten Spulen auf einen einzigen Kern gewickelt werden. Dadurch kann Platz eingespart werden. Gerade in kleinen Fernbedienungen ist für die im Frequenzbereich von 50 bis 200 kHz verhältnismäßig großen Spulen wenig Platz. Die Einsparung eines Kerns ermöglicht ein deutlich kleineres Volumen der Fernbedienung beziehungsweise allgemein des Senders beziehungsweise Empfängers.Advantageously, therefore, according to the invention, do not need two independent coils wound on two coil cores to become. Instead, all required coils can be used be wound on a single core. This can Space can be saved. Especially in small remote controls is proportionate for those in the frequency range from 50 to 200 kHz large coils little space. Saving a core enables a significantly smaller volume of the remote control or generally of the sender or receiver.
Da die Empfangsspulen in der Regel wesentlich höhere Windungszahlen als die Sendespulen besitzen, können ohne zusätzlichen technischen Aufwand sehr starke Sendefelder erzeugt werden, obwohl nur sehr niedrige Betriebsspannungen zur Verfügung stehen. Daher werden keine zusätzlichen Spannungsvervielfacher benötigt, beziehungsweise es können Batterien mit weniger Spannung verwendet werden, oder es müssen weniger Batterien in Reihe geschaltet werden. Auch dadurch lässt sich Platz beziehungsweise Bauraum sparen.Since the receiving coils generally have significantly higher numbers of turns than the transmitter coils can have without additional technical effort generated very strong broadcast fields are available, although only very low operating voltages stand. Therefore, no additional voltage multiplier needed, or batteries with less voltage is used, or less Batteries can be connected in series. This can also be done Save space or installation space.
Die Kombination von Sende- und Empfangsspule auf einem Kern ist in der Herstellung letztlich billiger als zwei völlig getrennte Spulen. The combination of transmitter and receiver coil on one core is ultimately cheaper to manufacture than two completely separate ones Do the washing up.
Die Empfangseinrichtung kann einen Empfänger aufweisen, von dem die Empfangsspule durch eine Schutzschaltung getrennt wird. Dies sollte vorgenommen werden, um den Empfänger vor überhöhten Spannungen zu schützen, die durch die Transformatorwirkung von Sende- und Empfangsspule zustande kommen können. Vorzugsweise besteht die Schutzschaltung aus einem Kondensator und einer dazu in Reihe geschalteten Parallelschaltung zweier antiparalleler Dioden. Diese verhindert, dass an dem Empfänger, an dessen Eingang die Dioden-Parallelschaltung liegt, zu hohe Spannungen anliegen.The receiving device can have a receiver, from which the receiving coil is separated by a protective circuit becomes. This should be done to the recipient protect excessive voltages caused by the transformer action can come from the transmitting and receiving coil. The protective circuit preferably consists of a capacitor and a parallel connection connected in series two anti-parallel diodes. This prevents the receiver, at whose input the diode parallel connection voltage is too high.
Vorzugsweise sind die Empfangs- und Sendeeinrichtungen für einen Frequenzbereich von 50 bis 200 kHz ausgelegt. Dieser Frequenzbereich ist für Fernbedienungen zugelassen.The receiving and transmitting devices are preferably for designed for a frequency range from 50 to 200 kHz. This Frequency range is approved for remote controls.
Die Empfangseinrichtung kann einen Empfangsschwingkreis aufweisen, wobei die Empfangsspule die Schwingkreisspule bildet. Der Empfangsschwingkreis wird damit insbesondere als Sendeleistungsverstärker verwendet.The receiving device can have a receiving resonant circuit, wherein the receiving coil forms the voice coil. The receiving resonant circuit is thus used in particular as a transmission power amplifier used.
Die Empfangseinrichtung sollte einen Korrekturkondensator zur Korrektur der Eigenfrequenz des Empfangsschwingkreises aufweisen. Hierdurch lassen sich die Frequenzänderungen, die durch die Induktivitäten der Sendespulen hervorgerufen werden, kompensieren. Günstigerweise wird der Schutzkondensator aus der Schutzschaltung gleichzeitig als Korrekturkondensator verwendet, so dass ein weiteres Bauteil eingespart werden kann.The receiving device should have a correction capacitor Have correction of the natural frequency of the receiving resonant circuit. This allows the frequency changes that caused by the inductances of the transmitter coils, compensate. The protective capacitor is favorably from the protective circuit simultaneously as a correction capacitor used, so that another component can be saved can.
Die vorliegende Erfindung wird nun anhand der beigefügten Zeichnung näher erläutert, die ein Schaltbild einer erfindungsgemäßen Übertragungsvorrichtung darstellt.The present invention will now be described with reference to the accompanying Drawing explained in more detail, which is a circuit diagram of an inventive Represents transmission device.
Das nachfolgend geschilderte Ausführungsbeispiel stellt eine bevorzugte Ausführungsform der vorliegenden Erfindung dar. The embodiment described below represents one preferred embodiment of the present invention.
Gemäß dem in der Figur dargestellten Schaltplan ist der Sender
1 mit einer oder mehreren Sendespulen 2 ausgestattet. Die
Sendespulen sind über einen gemeinsamen Kern 3 mit einer Empfangsspule
4 gekoppelt. Parallel an die Empfangsspule ist ein
Schwingkreiskondensator 5 angeschlossen. An die beiden Pole
des Parallelschwingkreises ist eine Schutzschaltung bestehend
aus einem Schutzkondensator 6 und einer dazu in Reihe geschalteten
Parallelschaltung zweier antiparalleler Dioden 7
und 8 angeschlossen. Die parallel geschalteten Dioden 7 und 8
sind an den Eingang eines Empfängers 9 angeschlossen.According to the circuit diagram shown in the figure, the transmitter is
1 equipped with one or
Die Funktionsweise dieser Schaltung sei im Folgenden näher
erläutert. Die ohnehin notwendige getrennte Empfangsspule 4
ist auf den gleichen Kern gewickelt, auf dem sich auch die
Sendespulen 2 befinden. Dadurch wird die Empfangsspule 4, die
mit ihrem zugehörigen Kondensator 5 einen kompletten Schwingkreis
darstellt, durch die Sendespulen 2 ebenfalls zum
Schwingen angeregt. Da die Empfangsspule 4 im Vergleich zu
den Sendespulen 2 mehr Windungen hat, werden im Empfangsschwingkreis
4, 5 während des Sendevorganges relativ hohe
Spannungen erzeugt, die durch den Schwingungseffekt des
Schwingkreises trotz der vielen Windungen auch wieder recht
hohe Ströme erzeugen. Die eigentlichen Sendespulen 2 liefern
jetzt nur noch die abgestrahlte Energie nach. Daher braucht
durch diese Spulen nicht mehr soviel Strom zu fließen. Das
starke Sendefeld wird jetzt von der durch die Sendespulen 2
erregten Empfangsspule 4 erzeugt. Wegen der Erregung durch
die Sendespulen 2, die von außen gesteuert werden, ist auch
die Frequenz absolut stabil und von außen vorgebbar. Toleranzen
der Bauteile in den Schwingkreisen haben also keinen Einfluss
auf die Sendefrequenz. Sie wirken sich lediglich in gewissem
Maß auf den Wirkungsgrad des Senders 1 aus.The mode of operation of this circuit is described in more detail below
explained. The
Durch die Induktivitäten der Sendespulen 2 ändert sich die
Induktivität der gekoppelten Empfangsspule 4, so dass die Eigenfrequenz
des Schwingkreises 4, 5 nach Ändern des zugehörigen
Kapazitätswertes des Schwingkreiskondensators 5 korrigiert
werden muss. Die Induktivität des Schwingkreises wird
kleiner, d.h. die Kapazität des Schwingkreises muss erhöht
werden. Eine hierzu geeignete Kapazität kann ohne Probleme so
verschaltet werden, dass sie gleichzeitig als Schutz für die
empfindliche Empfängereingangsstufe 9 dient. Da eine solche
Schutzschaltung 6, 7, 8 ohnehin benötigt worden wäre, kommt
diese Schaltungslösung ohne zusätzliche Bauteile aus. Die
Schutzschaltung 6, 7, 8 besteht nur aus dem Korrekturkondensator
6 und zwei antiparallel geschalteten Dioden 7 und 8,
die parallel zum Kondensator 5 des Empfängerschwingkreises
angeschlossen sind. Die Empfangssignale werden an den Dioden
7, 8 abgegriffen. Bei den im Sendebetrieb erzeugten hohen
Spannungen von typischerweise etwa 50 Volt gehen die Dioden
7, 8 in den leitenden Zustand und schalten damit den ihnen
vorgelagerten Kondensator 6 parallel zum Schwingkreiskondensator
5 des Empfangskreises. Damit wird die Resonanzfrequenz
des Schwingkreises 4, 5 für den Sendebetrieb korrigiert.
Gleichzeitig werden die Signale am Eingang des hochohmigen
Empfängers durch die Dioden 7, 8 auf maximal ca. 0,7 Volt begrenzt.
Die meiste vom Schwingkreis erzeugt Spannung fällt
dann an dem Schutzkondensator 6 ab.The inductances of the
Im Empfangsbetrieb sind die Empfangssignale so klein, dass
die Dioden 7, 8 sperren. Die Spannungen der Empfangssignale
erreichen typischerweise höchstens den mV-Bereich. Dadurch
ist nur noch der ursprüngliche Schwingkreiskondensator 5 aktiv.
Gleichzeitig sind die Sendespulen 2 abgeschaltet. Das
heißt, mindestens ein Anschluss jeder Sendespule 2 ist offen.
Damit wirken sie sich auf den Empfangsschwingkreis 4, 5 nicht
mehr aus. Er kann also auf seiner Empfangsfrequenz, auf die
er abgestimmt ist, frei schwingen. Das Signal wird somit nahezu
ohne Verluste über den Schutz- beziehungsweise Korrekturkondensator
6 an die Schutzdioden 7, 8 weiter übertragen.
Wegen der geringen Empfangsspannung sind diese Dioden 7, 8
gesperrt. D.h. die Empfangsspannung kann an den Diodenanschlüssen
in voller Höhe vom hochohmigen Empfängereingang abgenommen
werden. In reception mode, the reception signals are so small that
block the
Die vorgestellte Schaltung besitzt damit neben dem Vorteil, dass die Empfangsspule als Sendeverstärker verwendet wird, auch den Vorteil eines verminderten Platzbedarfs, da für die Sende- und Empfangsspulen ein gemeinsamer Kern verwendet wird und der Schutzkondensator gleichzeitig auch als Korrekturkondensator verwendet wird.In addition to the advantage of the circuit presented, that the reception coil is used as a transmission amplifier, also the advantage of a reduced space requirement, because for the Transmit and receive coils a common core is used and the protective capacitor also serves as a correction capacitor is used.
Claims (8)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10304479 | 2003-02-04 | ||
| DE10304479A DE10304479B3 (en) | 2003-02-04 | 2003-02-04 | Data transmission and reception device for remote control of hearing aid with transmission and reception coils wound around common core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1445983A2 true EP1445983A2 (en) | 2004-08-11 |
| EP1445983A3 EP1445983A3 (en) | 2010-03-10 |
Family
ID=32520133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04000633A Withdrawn EP1445983A3 (en) | 2003-02-04 | 2004-01-14 | Device for transmitting and receiving data for remote controlling hearing aids |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7366316B2 (en) |
| EP (1) | EP1445983A3 (en) |
| JP (1) | JP4272553B2 (en) |
| CN (1) | CN100592646C (en) |
| DE (1) | DE10304479B3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1480492A2 (en) * | 2003-05-22 | 2004-11-24 | Siemens Audiologische Technik GmbH | Transmission coil system and remote control for a hearing aid |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006029195A1 (en) * | 2006-06-26 | 2008-01-03 | Siemens Audiologische Technik Gmbh | Transceiver circuit with PIN diodes |
| DE102007001538B4 (en) * | 2007-01-10 | 2015-02-12 | Siemens Audiologische Technik Gmbh | Hearing device with automatic self-trim and corresponding method |
| DK2056626T3 (en) * | 2007-11-02 | 2012-10-22 | Oticon As | WIRELESS TRANSMISSION PRINCIPLE |
| US8050634B2 (en) * | 2008-04-18 | 2011-11-01 | Telefonaktiebolaget L M Ericsson (Publ) | Transceiver with isolated receiver |
| DE102009016661B4 (en) * | 2009-04-07 | 2015-05-07 | Siemens Medical Instruments Pte. Ltd. | Hearing aid arrangement with a carrying collar with integrated antenna and associated method for the wireless transmission of data |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1347808A (en) * | 1971-05-26 | 1974-02-27 | Charbonnages De France | Portable transmitter receiver |
| US5084699A (en) * | 1989-05-26 | 1992-01-28 | Trovan Limited | Impedance matching coil assembly for an inductively coupled transponder |
| DE20114461U1 (en) * | 2001-09-03 | 2001-10-31 | Siemens Audiologische Technik | Transmitting and / or receiving unit for a hearing aid |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3365670A (en) * | 1964-02-27 | 1968-01-23 | Western Geophysical Co | Low noise heterodyne vlf receiver system |
| DE69233156T2 (en) | 1991-01-17 | 2004-07-08 | Adelman, Roger A. | IMPROVED HEARING AID |
| US5317330A (en) * | 1992-10-07 | 1994-05-31 | Westinghouse Electric Corp. | Dual resonant antenna circuit for RF tags |
| DE4431446C2 (en) * | 1994-09-03 | 1996-10-17 | Norbert H L Dr Ing Koster | Transponder antenna device |
| US20020091337A1 (en) | 2000-02-07 | 2002-07-11 | Adams Theodore P. | Wireless communications system for implantable hearing aid |
| US6584301B1 (en) * | 2000-05-25 | 2003-06-24 | Motorola, Inc. | Inductive reader device and method with integrated antenna and signal coupler |
| US6229443B1 (en) * | 2000-06-23 | 2001-05-08 | Single Chip Systems | Apparatus and method for detuning of RFID tag to regulate voltage |
-
2003
- 2003-02-04 DE DE10304479A patent/DE10304479B3/en not_active Expired - Fee Related
-
2004
- 2004-01-14 EP EP04000633A patent/EP1445983A3/en not_active Withdrawn
- 2004-02-02 JP JP2004025021A patent/JP4272553B2/en not_active Expired - Fee Related
- 2004-02-03 CN CN200410003255A patent/CN100592646C/en not_active Expired - Fee Related
- 2004-02-04 US US10/771,893 patent/US7366316B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1347808A (en) * | 1971-05-26 | 1974-02-27 | Charbonnages De France | Portable transmitter receiver |
| US5084699A (en) * | 1989-05-26 | 1992-01-28 | Trovan Limited | Impedance matching coil assembly for an inductively coupled transponder |
| DE20114461U1 (en) * | 2001-09-03 | 2001-10-31 | Siemens Audiologische Technik | Transmitting and / or receiving unit for a hearing aid |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1480492A2 (en) * | 2003-05-22 | 2004-11-24 | Siemens Audiologische Technik GmbH | Transmission coil system and remote control for a hearing aid |
| EP1480492A3 (en) * | 2003-05-22 | 2007-09-19 | Siemens Audiologische Technik GmbH | Transmission coil system and remote control for a hearing aid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100592646C (en) | 2010-02-24 |
| CN1527489A (en) | 2004-09-08 |
| DE10304479B3 (en) | 2004-07-22 |
| JP2004242302A (en) | 2004-08-26 |
| EP1445983A3 (en) | 2010-03-10 |
| JP4272553B2 (en) | 2009-06-03 |
| US20040235427A1 (en) | 2004-11-25 |
| US7366316B2 (en) | 2008-04-29 |
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