EP1448021A2 - Data transmission apparatus for hearing aids - Google Patents
Data transmission apparatus for hearing aids Download PDFInfo
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- EP1448021A2 EP1448021A2 EP04001576A EP04001576A EP1448021A2 EP 1448021 A2 EP1448021 A2 EP 1448021A2 EP 04001576 A EP04001576 A EP 04001576A EP 04001576 A EP04001576 A EP 04001576A EP 1448021 A2 EP1448021 A2 EP 1448021A2
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- circuit
- data transmission
- oscillator circuit
- transmission device
- oscillator
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 40
- 230000010355 oscillation Effects 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000009966 trimming Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000005669 field effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
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Classifications
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- 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
- H04R25/554—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 using a wireless connection, e.g. between microphone and amplifier or using Tcoils
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- 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 data transmission device for hearing aids with a modulatable oscillator circuit to generate a changeable transmission signal and an antenna device for radiating the transmission signal.
- the integrated circuit of the respective hearing aid should be integrable.
- the integrated circuit of the respective hearing aid should be integrable.
- this is the low available Space especially in in-the-ear hearing aids and on the other the very small amount of electricity available for supply of the transmitter, which is usually in the microampere range.
- Another constraint is the one necessary for the transfer high frequency stability, usually only with a quartz oscillator can be achieved.
- the publication DE 101 15 896 a hearing aid system with a programmable hearing aid and a transmitting and receiving unit known.
- the hearing aid is for wireless programming a detachable with the hearing aid connected transmitting and receiving unit provided.
- This preferably has the outer shape of a hearing aid battery and is for programming in the battery compartment of the hearing aid used. This is for wireless programming necessary components of the hearing aid only during programming connected to the hearing aid.
- the hearing aid is data in an external programming device provided and in the form of a transmitting and receiving coil electromagnetic waves on a separate, the hearing aid assigned transmit and receive coil.
- the object of the present invention is therefore a data transmission device for hearing aids with little To provide space and low power consumption.
- this object is achieved by a data transmission device for hearing aids with a modular Oscillator circuit for generating a changeable transmission signal and an antenna device for radiating the transmission signal
- the oscillator circuit is a coil device includes that as a transmitting and receiving antenna device is used.
- the data transmission device advantageously has a control circuit with which only during a negative or positive half-wave of the oscillation of the oscillator circuit an adjustable amount of energy in the oscillator circuit is fed.
- This half-wave feed can be particularly advantageous with the help of a Current mirror, from a the polarity of the vibration monitoring comparator circuit is realized.
- the current mirror is preferably used for control purposes the transmitted power and the vibration amplitude usable.
- a modulator circuit connected to the oscillator circuit and is a switchable capacitor element comprises, for frequency modulation of the oscillation of the oscillator circuit intended.
- This switchable capacitor element has a very small footprint and can possibly be integrated on the IC. This structure ensures moreover also an amplitude modulation of the signal to be emitted.
- a trimmer connected to the oscillator circuit is to be provided.
- the purpose of this is the resonance frequency, which due to the component tolerances from Setpoint can deviate by connecting or disconnecting capacitance elements adjust.
- FIG 1 becomes the transmit oscillator through a parallel LC resonant circuit educated.
- One terminal of the parallel resonant circuit is LC with a fixed potential VP, which represents a DC potential, which, for example, directly the supply or Battery voltage corresponds or also from one any existing voltage multiplier circuit is derived can be supplied.
- the second terminal P of the parallel resonant circuit LC is designed as a free-floating pole.
- a comparator K monitors the free-floating pole P. versus the supply potential VP.
- the output signal of the Comparator K is used to control a controllable current source I.
- the current source I is between a supply terminal + and one formed with two field effect transistors T1, T2 Current mirror used for decoupling and impedance matching serves the oscillator circuit LC, closed.
- the first Field effect transistor T1 of the current mirror is with its Drain to one input of the comparator K or connected the freely oscillating pole P. With the source is the transistor T1 is connected to ground.
- the gate of the field effect transistor T1 is with the gate of the second field effect transistor T2 of the current mirror connected. Gate and drain of the second field effect transistor T2 are also together connected.
- the source of the field effect transistor is T2 again connected to ground.
- the drain of the field effect transistor T2 is connected to the controllable current source I.
- the controllable current source I receives further control signals from a starting circuit AS and a trimming circuit TS.
- the comparator K monitors the freely oscillating pole P des LC resonant circuit. For levels less than the fixed resting potential VP are, he turns the current mirror active. Otherwise he blocks the current mirror. Thus the Vibration during the negative half-wave a positive feedback. During the positive half wave, the energy of the resonant circuit LC used to maintain the vibration.
- the oscillation frequency is determined by the resonance of the LC oscillation circuit determined and can thus by the appropriate choice of L and C can be set.
- the power coupled into the resonance circuit LC is direct proportional to the current that the current mirror T1, T2 feeds.
- Suitable constant currents are available, which can be set using common measures.
- the mirror ratio n: 1 of the current mirror the drive current of the current mirror can be reduced by the ratio n be less than the current delivered to the resonant circuit.
- the voltage VP can be reached as the maximum transmission amplitude. The available voltage range is thus optimally used.
- Controlling the electricity fed in not only enables a comparison of the transmission amplitude, but also allows one precise limitation of the current drawn from the battery. Programming can be used to compare the copy controls the integrated circuit and the external components respectively.
- the application is made at the moment of switching on a short current pulse is required.
- This task takes over the start-up circuit AS, which is the current mirror circuit at the beginning with a current pulse of suitable length.
- the comparator K takes control of the current mirror.
- the trim circuit TS serves the current to the used Adapt components exactly.
- a change in the control current I leads to a proportional one Change in the amplitude of the vibration, with which a corresponding Amplitude modulation can be achieved.
- a suitable one Modulator circuit for the current I can structure thus be used to generate an AM transmit signal. 2 shows a corresponding control input S for the Current source I indicated. Depending on a control signal S the current is varied and thus the transmission signal is amplitude modulated.
- the other components of the circuit of FIG. 2 correspond to those of FIG. 1.
- FIG. Another embodiment of the present invention is shown in FIG. Here is one way to change it the transmission frequency shown by connecting a capacitance C.
- the resonance frequency of the LC circuit is around a defined Value decreased when transistor T3 is turned on becomes.
- the transistor 3 is driven by a FSK signal, so that a modulation according to the so-called frequency shift keying can be performed.
- the transistor T3 can also be changed Frequency modulation signal can be controlled.
- trim capacitors C4 to Ck By suitable connection of trim capacitors C4 to Ck there is also a trimming via switching transistors T4 to Tk the resonance frequency to compensate for component tolerances possible.
- the switching transistors T3 to Tk and all of them Trim capacitors can be on the integrated circuit be integrated into the hearing aid. So that the entire circuit according to one of Figures 1 to 3 on an IC, at most with the exception of component L, be integrated, the coil L used as an antenna in an inductive transmission system can be.
- Such a circuit described above ensures the Operation with usual supply voltages in the hearing aid as well a precise and simple setting of the transmission amplitude. Maximum is a transmission amplitude up to without special wiring reachable for double operating voltage. When using more suitable Booster circuits can also be higher Voltages are generated. Preferably used as a modulation method the AM and the FSK used. Through the switchable Capacitor elements is a simple adjustment the transmission frequency possible.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Datenübertragungseinrichtung für Hörgeräte mit einer modulierbaren Oszillatorschaltung zur Erzeugung eines veränderbaren Sendesignals und einer Antenneneinrichtung zum Abstrahlen des Sendesignals.The present invention relates to a data transmission device for hearing aids with a modulatable oscillator circuit to generate a changeable transmission signal and an antenna device for radiating the transmission signal.
Bei der drahtlosen Datenübertragung zwischen Hörgeräten beziehungsweise zwischen einem Hörgerät und einer Fernbedieneinheit ist es erforderlich, dass das Hörgerät beziehungsweise die Hörgeräte einen modulierbaren Sendeoszillator aufweisen, der in den integrierten Schaltkreis des jeweiligen Hörgeräts integrierbar sein sollte. Für die Sendeeinrichtungen in Hörgeräten liegen jedoch sehr spezielle Randbedingungen vor. Zum einem ist dies der geringe zur Verfügung stehende Raum insbesondere in In-dem-Ohr-Hörgeräten und zum anderen der sehr geringe zur Verfügung stehende Strom zur Versorgung des Senders, der üblicherweise im Mikroamperebereich liegt. Eine weitere Randbedingung ist die für die Übertragung notwendige hohe Frequenzstabilität, die üblicherweise nur mit einem Quarz-Oszillator erreicht werden kann.With wireless data transmission between hearing aids respectively between a hearing aid and a remote control unit it is necessary that the hearing aid respectively the hearing aids have a modulated transmission oscillator, the integrated circuit of the respective hearing aid should be integrable. For the transmitters However, there are very special boundary conditions in hearing aids in front. For one thing, this is the low available Space especially in in-the-ear hearing aids and on the other the very small amount of electricity available for supply of the transmitter, which is usually in the microampere range. Another constraint is the one necessary for the transfer high frequency stability, usually only with a quartz oscillator can be achieved.
Bisher konnten diese Randbedingungen lediglich durch amplitudenmodulierte Sender in Hörgeräten eingehalten werden, um beispielsweise sogenannte Cross- und Bi-Cross-Übertragungen zwischen Hörgeräten zu gewährleisten. Für die Sender wurden gängige Oszillator-Standard-Schaltungen verwendet. Nachteilig an diesen Standardschaltungen ist der hohe Stromverbrauch sowie die Verwendung eines verhältnismäßig voluminösen Quarzoszillators als Frequenznormal.So far, these boundary conditions could only be modulated by amplitude Transmitter in hearing aids are kept to for example so-called cross and bi-cross transmissions between hearing aids. For the broadcasters common oscillator standard circuits used. adversely on these standard circuits is the high power consumption as well the use of a relatively bulky quartz oscillator as frequency standard.
In diesem Zusammenhang ist aus der Druckschrift DE 101 15 896 ein Hörgerätesystem mit einem programmierbaren Hörgerät und einer Sende- und Empfangseinheit bekannt. Bei dem Hörgerät ist zur drahtlosen Programmierung eine lösbar mit dem Hörgerät verbundene Sende- und Empfangseinheit vorgesehen. Diese weist vorzugsweise die äußere Form einer Hörgeräte-Batterie auf und ist zum Programmieren in das Batteriefach des Hörgeräts einsetzbar. Hierdurch sind zum drahtlosen Programmieren des Hörgeräts notwendige Komponenten nur während des Programmierens mit dem Hörgerät verbunden. Bei der Programmierung des Hörgeräts werden in einem externen Programmiergerät Daten bereitgestellt und über eine Sende- und Empfangsspule in Form elektromagnetischer Wellen auf eine separate, dem Hörgerät zugeordnete Sende- und Empfangsspule übertragen.In this context, the publication DE 101 15 896 a hearing aid system with a programmable hearing aid and a transmitting and receiving unit known. With the hearing aid is for wireless programming a detachable with the hearing aid connected transmitting and receiving unit provided. This preferably has the outer shape of a hearing aid battery and is for programming in the battery compartment of the hearing aid used. This is for wireless programming necessary components of the hearing aid only during programming connected to the hearing aid. When programming The hearing aid is data in an external programming device provided and in the form of a transmitting and receiving coil electromagnetic waves on a separate, the hearing aid assigned transmit and receive coil.
Die Aufgabe der vorliegenden Erfindung besteht somit darin, eine Datenübertragungseinrichtung für Hörgeräte mit geringem Platzbedarf und geringem Stromverbrauch bereitzustellen.The object of the present invention is therefore a data transmission device for hearing aids with little To provide space and low power consumption.
Erfindungsgemäß wird diese Aufgabe gelöst durch eine Datenübertragungseinrichtung für Hörgeräte mit einer modulierbaren Oszillatorschaltung zur Erzeugung eines veränderbaren Sendesignals und einer Antenneneinrichtung zum Abstrahlen des Sendesignals wobei die Oszillatorschaltung eine Spuleneinrichtung umfasst, die als Sende- und Empfangsantenneneinrichtung verwendet ist.According to the invention, this object is achieved by a data transmission device for hearing aids with a modular Oscillator circuit for generating a changeable transmission signal and an antenna device for radiating the transmission signal wherein the oscillator circuit is a coil device includes that as a transmitting and receiving antenna device is used.
Da an Stelle eines Quarzoszillators ein LC-Schwingkreis als Sendeoszillator verwendet werden kann, kann dieser auf Grund seines geringen Volumens zumindest teilweise in die integrierte Schaltung des Hörgeräts aufgenommen werden. Wenn der Schwingkreis eine hohe Güte besitzt, kann der Sender mit einem guten Wirkungsgrad betrieben werden. Dies ist insbesondere deswegen vorteilhaft, da der Sendeoszillator im Hörgerät mit einer sehr niedrigen Versorgungsspannung betrieben werden kann, wobei die Amplitude der Sendespannung den verfügbaren Bereich soweit wie möglich ausnutzen sollte. Somit lässt sich ein verhältnismäßig großer Anteil der dem Schwingkreis zugeführten Leistung abstrahlen , womit ein hoher Wirkungsgrad erzielt werden kann. Since instead of a quartz oscillator an LC resonant circuit as Transmit oscillator can be used, this can be due its small volume at least partially in the integrated Circuit of the hearing aid are recorded. If the Resonant circuit has a high quality, the transmitter can with a good efficiency. This is particularly so therefore advantageous because the transmission oscillator in the hearing aid can be operated with a very low supply voltage can, the amplitude of the transmission voltage the available Area should be used as far as possible. So you can a relatively large proportion of those fed to the resonant circuit Radiate power, making it highly efficient can be achieved.
Vorteilhafterweise besitzt die Datenübertragungseinrichtung einen Ansteuerschaltkreis, mit dem ausschließlich während einer negativen oder positiven Halbwelle der Schwingung der Oszillatorschaltung eine einstellbare Energiemenge in die Oszillatorschaltung eingespeist wird. Somit kann die begrenzte Batteriekapazität besser ausgenutzt werden. Diese Halbwelleneinspeisung lässt sich besonders vorteilhaft mit Hilfe eines Stromspiegels, der von einer die Polarität der Schwingung überwachenden Komparatorschaltung angesteuert wird, realisieren. Vorzugsweise ist dabei der Stromspiegel zur Steuerung der abzugebenden Sendeleistung und der Schwingungsamplitude verwendbar.The data transmission device advantageously has a control circuit with which only during a negative or positive half-wave of the oscillation of the oscillator circuit an adjustable amount of energy in the oscillator circuit is fed. Thus, the limited Battery capacity can be better used. This half-wave feed can be particularly advantageous with the help of a Current mirror, from a the polarity of the vibration monitoring comparator circuit is realized. The current mirror is preferably used for control purposes the transmitted power and the vibration amplitude usable.
Vorteilhafterweise ist in der Datenübertragungseinrichtung eine Modulatorschaltung, die an die Oszillatorschaltung angeschlossen ist und die ein zuschaltbares Kondensatorelement umfasst, zur Frequenzmodulation der Schwingung der Oszillatorschaltung vorgesehen. Dieses zuschaltbare Kondensatorelement weist einen sehr geringen Platzbedarf auf und kann gegebenenfalls auf den IC integriert werden. Dieser Aufbau gewährleistet darüber hinaus auch ohne Weiteres, eine Amplitudenmodulation des abzustrahlenden Signals durchzuführen.It is advantageous in the data transmission device a modulator circuit connected to the oscillator circuit and is a switchable capacitor element comprises, for frequency modulation of the oscillation of the oscillator circuit intended. This switchable capacitor element has a very small footprint and can possibly be integrated on the IC. This structure ensures moreover also an amplitude modulation of the signal to be emitted.
Zum Trimmen der Resonanzfrequenz der Oszillatorschaltung kann eine Trimmeinrichtung, die an die Oszillatorschaltung angeschlossen ist, vorgesehen sein. Diese hat den Zweck, die Resonanzfrequenz, die auf Grund der Bauteiletoleranzen vom Sollwert abweichen kann, durch Zu- oder Wegschalten von Kapazitätselementen einzustellen.To trim the resonance frequency of the oscillator circuit can a trimmer connected to the oscillator circuit is to be provided. The purpose of this is the resonance frequency, which due to the component tolerances from Setpoint can deviate by connecting or disconnecting capacitance elements adjust.
Die vorliegende Erfindung wird nun anhand der beigefügten Zeichnungen näher erläutert, in denen zeigen:
- FIG 1
- ein Schaltungsdiagramm eines erfindungsgemäßen Sendeoszillators;
- FIG 2
- ein Schaltungsdiagramm eines erweiterten erfindungsgemäßen Schaltungsoszillators; und
- FIG 3
- ein Schaltungsdiagramm eines alternativen Sendeoszillators.
- FIG. 1
- a circuit diagram of a transmission oscillator according to the invention;
- FIG 2
- a circuit diagram of an extended circuit oscillator according to the invention; and
- FIG 3
- a circuit diagram of an alternative transmission oscillator.
Die nachfolgenden Ausführungsbeispiele stellen bevorzugte Ausführungsformen der vorliegenden Erfindung dar.The following exemplary embodiments are preferred Embodiments of the present invention.
Bei einer ersten erfindungsgemäßen Ausführungsform gemäß FIG 1 wird der Sendeoszillator durch einen parallelen LC-Schwingkreis gebildet. Eine Klemme des Parallelschwingkreises LC ist mit einem festen Potential VP, das ein DC-Potential darstellt, welches beispielsweise direkt der Versorgungs- beziehungsweise Batteriespannung entspricht oder auch von einer eventuell vorhandenen Spannungsvervielfacherschaltung abgeleitet werden kann, versorgt. Die zweite Klemme P des Parallelschwingkreises LC ist als freischwingender Pol ausgestaltet. Ein Komparator K überwacht den freischwingenden Pol P gegenüber dem Versorgungspotential VP. Das Ausgangssignal des Komparators K dient zur Steuerung einer steuerbaren Stromquelle I. Die Stromquelle I ist zwischen eine Versorgungsklemme + und einen mit zwei Feldeffekttransistoren T1, T2 gebildeten Stromspiegel, der zur Entkopplung und Impedanzanpassung der Oszillatorschaltung LC dient, geschlossen. Der erste Feldeffekttransistor T1 des Stromspiegels ist mit seinem Drain an den einen Eingang des Komparators K beziehungsweise den frei schwingenden Pol P angeschlossen. Mit der Source ist der Transistor T1 an Masse geschaltet. Das Gate des Feldeffekttransistors T1 ist mit dem Gate des zweiten Feldeffekttransistors T2 des Stromspiegels verbunden. Gate und Drain des zweiten Feldeffekttransistors T2 sind ebenfalls miteinander verbunden. Die Source des Feldeffekttransistors T2 ist wiederum an Masse geschaltet. Das Drain des Feldeffekttransistors T2 ist mit der steuerbaren Stromquelle I verbunden. In a first embodiment according to the invention according to FIG 1 becomes the transmit oscillator through a parallel LC resonant circuit educated. One terminal of the parallel resonant circuit is LC with a fixed potential VP, which represents a DC potential, which, for example, directly the supply or Battery voltage corresponds or also from one any existing voltage multiplier circuit is derived can be supplied. The second terminal P of the parallel resonant circuit LC is designed as a free-floating pole. A comparator K monitors the free-floating pole P. versus the supply potential VP. The output signal of the Comparator K is used to control a controllable current source I. The current source I is between a supply terminal + and one formed with two field effect transistors T1, T2 Current mirror used for decoupling and impedance matching serves the oscillator circuit LC, closed. The first Field effect transistor T1 of the current mirror is with its Drain to one input of the comparator K or connected the freely oscillating pole P. With the source is the transistor T1 is connected to ground. The gate of the field effect transistor T1 is with the gate of the second field effect transistor T2 of the current mirror connected. Gate and drain of the second field effect transistor T2 are also together connected. The source of the field effect transistor is T2 again connected to ground. The drain of the field effect transistor T2 is connected to the controllable current source I.
Weitere Steuersignale erhält die steuerbare Stromquelle I von einer Anlaufschaltung AS und einer Trimmschaltung TS.The controllable current source I receives further control signals from a starting circuit AS and a trimming circuit TS.
Der Komparator K überwacht den frei schwingenden Pol P des LC-Schwingkreises. Für Pegel, die kleiner als das feste Ruhepotential VP sind, schaltet er den Stromspiegel aktiv. Andernfalls sperrt er den Stromspiegel. Somit erfährt die Schwingung während der negativen Halbwelle eine Mitkopplung. Während der positiven Halbwelle wird die Energie des Resonanzkreises LC genutzt, um die Schwingung aufrecht zu erhalten.The comparator K monitors the freely oscillating pole P des LC resonant circuit. For levels less than the fixed resting potential VP are, he turns the current mirror active. Otherwise he blocks the current mirror. Thus the Vibration during the negative half-wave a positive feedback. During the positive half wave, the energy of the resonant circuit LC used to maintain the vibration.
Die Schwingfrequenz wird durch die Resonanz des LC-Schwingkreises bestimmt und kann somit durch die geeignete Wahl von L und C festgelegt werden.The oscillation frequency is determined by the resonance of the LC oscillation circuit determined and can thus by the appropriate choice of L and C can be set.
Die in den Resonanzkreis LC eingekoppelte Leistung ist direkt proportional zum Strom, den der Stromspiegel T1, T2 einspeist. Somit kann durch Vorgabe des eingespeisten Stroms die Sendeamplitude einfach gesteuert werden. In einem integrierten Schaltkreis stehen dafür geeignete Konstantströme bereit, die über gängige Maßnahmen eingestellt werden können. Durch geeignete Wahl des Spiegelverhältnisses n:1 des Stromspiegels kann der Ansteuerstrom des Stromspiegels um das Verhältnis n geringer sein als der an den Schwingkreis abgegebene Strom. Als maximale Sendeamplitude ist die Spannung VP erreichbar. Der verfügbare Spannungsbereich wird damit optimal ausgenutzt.The power coupled into the resonance circuit LC is direct proportional to the current that the current mirror T1, T2 feeds. Thus, by specifying the current fed in Send amplitude can be easily controlled. In an integrated Suitable constant currents are available, which can be set using common measures. By suitable choice of the mirror ratio n: 1 of the current mirror the drive current of the current mirror can be reduced by the ratio n be less than the current delivered to the resonant circuit. The voltage VP can be reached as the maximum transmission amplitude. The available voltage range is thus optimally used.
Die Steuerung des eingespeisten Stroms ermöglicht nicht nur einen Abgleich der Sendeamplitude, sondern gestattet auch eine genaue Begrenzung des der Batterie entnommenen Stroms. Durch Programmierung kann so ein Abgleich der Exemplarsteuerungen der integrierten Schaltung und der externen Bauelemente erfolgen. Controlling the electricity fed in not only enables a comparison of the transmission amplitude, but also allows one precise limitation of the current drawn from the battery. Programming can be used to compare the copy controls the integrated circuit and the external components respectively.
Zum Anregen der Schwingung ist im Einschaltmoment das Anlegen eines kurzen Stromimpulses erforderlich. Diese Aufgabe übernimmt die Anlaufschaltung AS, die zu Beginn die Stromspiegelschaltung mit einem Strompuls geeigneter Länge anregt. Erst nach diesem Impuls übernimmt der Komparator K die Kontrolle des Stromspiegels.In order to excite the vibration, the application is made at the moment of switching on a short current pulse is required. This task takes over the start-up circuit AS, which is the current mirror circuit at the beginning with a current pulse of suitable length. First after this pulse, the comparator K takes control of the current mirror.
Die Trimmschaltung TS dient dazu, den Strom an die eingesetzten Bauelemente exakt anzupassen.The trim circuit TS serves the current to the used Adapt components exactly.
Eine Änderung des Steuerstroms I führt zu einer proportionalen Änderung der Amplitude der Schwingung, womit eine entsprechende Amplitudenmodulation erzielbar ist. Mit einer geeigneten Modulatorschaltung für den Strom I kann die Struktur somit zur Generierung eines AM-Sendesignals verwendet werden. In FIG 2 ist ein entsprechender Steuerungseingang S für die Stromquelle I angedeutet. In Abhängigkeit eines Steuersignals S wird der Strom variiert und damit das Sendesignal amplitudenmoduliert. Die übrigen Bauelemente der Schaltung von FIG 2 entsprechen denen von FIG 1.A change in the control current I leads to a proportional one Change in the amplitude of the vibration, with which a corresponding Amplitude modulation can be achieved. With a suitable one Modulator circuit for the current I can structure thus be used to generate an AM transmit signal. 2 shows a corresponding control input S for the Current source I indicated. Depending on a control signal S the current is varied and thus the transmission signal is amplitude modulated. The other components of the circuit of FIG. 2 correspond to those of FIG. 1.
Eine weitere Ausführungsform der vorliegenden Erfindung ist in FIG 3 dargestellt. Hier ist eine Möglichkeit zur Änderung der Sendefrequenz durch Zuschaltung einer Kapazität C aufgezeigt. Die Resonanzfrequenz des LC-Kreises wird um einen definierten Wert herabgesetzt, wenn der Transistor T3 durchgeschaltet wird. Angesteuert wird der Transistor 3 durch ein FSK-Signal, so dass eine Modulation entsprechend dem sogenannten frequency-shift-keying durchgeführt werden kann. Selbstverständlich kann der Transistor T3 auch durch ein anderes Frequenzmodulationssignal angesteuert werden.Another embodiment of the present invention is shown in FIG. Here is one way to change it the transmission frequency shown by connecting a capacitance C. The resonance frequency of the LC circuit is around a defined Value decreased when transistor T3 is turned on becomes. The transistor 3 is driven by a FSK signal, so that a modulation according to the so-called frequency shift keying can be performed. Of course, the transistor T3 can also be changed Frequency modulation signal can be controlled.
Durch geeignete Zuschaltung von Trimm-Kondensatoren C4 bis Ck über Schalttransistoren T4 bis Tk ist außerdem eine Trimmung der Resonanzfrequenz zum Ausgleich von Bauelementtoleranzen möglich. Die Schalttransistoren T3 bis Tk und auch alle Trimmkondensatoren können auf dem integrierten Schaltkreis des Hörgeräts integriert sein. Damit kann die gesamte Schaltung gemäß einer der Figuren 1 bis 3 auf einem IC, allenfalls mit Ausnahme des Bauteils L, integriert sein, wobei die Spule L in einem induktiven Übertragungssystem als Antenne verwendet werden kann.By suitable connection of trim capacitors C4 to Ck There is also a trimming via switching transistors T4 to Tk the resonance frequency to compensate for component tolerances possible. The switching transistors T3 to Tk and all of them Trim capacitors can be on the integrated circuit be integrated into the hearing aid. So that the entire circuit according to one of Figures 1 to 3 on an IC, at most with the exception of component L, be integrated, the coil L used as an antenna in an inductive transmission system can be.
Eine derartige, oben beschriebene Schaltung gewährleistet den Betrieb mit im Hörgerät üblichen Versorgungsspannungen sowie eine genaue und einfache Einstellung der Sendeamplitude. Maximal ist ohne spezielle Beschaltung eine Sendeamplitude bis zur doppelten Betriebsspannung erreichbar. Bei Verwendung geeigneter Spannungserhöhungsschaltungen können auch höhere Spannungen erzeugt werden. Vorzugsweise werden als Modulationsverfahren die AM und das FSK verwendet. Durch die zuschaltbaren Kondensatorelemente ist ein einfacher Abgleich der Sendefrequenz möglich.Such a circuit described above ensures the Operation with usual supply voltages in the hearing aid as well a precise and simple setting of the transmission amplitude. Maximum is a transmission amplitude up to without special wiring reachable for double operating voltage. When using more suitable Booster circuits can also be higher Voltages are generated. Preferably used as a modulation method the AM and the FSK used. Through the switchable Capacitor elements is a simple adjustment the transmission frequency possible.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10305833 | 2003-02-12 | ||
| DE10305833A DE10305833B3 (en) | 2003-02-12 | 2003-02-12 | Data transmission device for hearing aid using modulated oscillator circuit having coil used as both transmission and reception antenna |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1448021A2 true EP1448021A2 (en) | 2004-08-18 |
| EP1448021A3 EP1448021A3 (en) | 2009-06-17 |
| EP1448021B1 EP1448021B1 (en) | 2015-04-01 |
Family
ID=32668044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04001576.0A Expired - Lifetime EP1448021B1 (en) | 2003-02-12 | 2004-01-26 | Hearing aid with data transmission apparatus |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7292698B2 (en) |
| EP (1) | EP1448021B1 (en) |
| JP (1) | JP4384515B2 (en) |
| CN (1) | CN100544502C (en) |
| DE (1) | DE10305833B3 (en) |
| DK (1) | DK1448021T3 (en) |
Cited By (4)
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| EP1871140A1 (en) * | 2006-05-26 | 2007-12-26 | Siemens Audiologische Technik GmbH | Hearing device with an oscillating circuit and corresponding method |
| WO2012171573A1 (en) * | 2011-06-17 | 2012-12-20 | Widex A/S | Hearing aid with a wireless transceiver and method of fitting a hearing aid |
| US8483416B2 (en) | 2006-07-12 | 2013-07-09 | Phonak Ag | Methods for manufacturing audible signals |
| US9300367B2 (en) | 2011-05-06 | 2016-03-29 | Oticon A/S | Receiver and method for retrieving an information signal from a magnetic induction signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8358795B2 (en) | 2006-07-28 | 2013-01-22 | Siemens Audiologische Technik Gmbh | Receiver system and method for transmitting information for an otological device |
| DE102006035102B4 (en) * | 2006-07-28 | 2016-04-07 | Sivantos Gmbh | Hearing aid with a transceiver system |
| DK2030337T3 (en) * | 2006-10-30 | 2009-12-07 | Phonak Ag | Communication system and method of operating this |
| US20080102906A1 (en) * | 2006-10-30 | 2008-05-01 | Phonak Ag | Communication system and method of operating the same |
| DE102007001538B4 (en) * | 2007-01-10 | 2015-02-12 | Siemens Audiologische Technik Gmbh | Hearing device with automatic self-trim and corresponding method |
| US8208665B2 (en) | 2007-01-10 | 2012-06-26 | Siemens Audiologische Technik Gmbh | Hearing apparatus with automatic self trimming and corresponding method |
| DE102007051307B4 (en) * | 2007-10-26 | 2011-02-17 | Siemens Medical Instruments Pte. Ltd. | Hearing device with use of an inductive switching regulator as a radio transmitter |
| US7929722B2 (en) * | 2008-08-13 | 2011-04-19 | Intelligent Systems Incorporated | Hearing assistance using an external coprocessor |
| US9414170B2 (en) * | 2012-12-28 | 2016-08-09 | Gn Resound A/S | Hearing aid having an adaptive antenna matching mechanism and a method for adaptively matching a hearing aid antenna |
| CN107771374A (en) * | 2015-06-26 | 2018-03-06 | 奥林巴斯株式会社 | Tuning offset phaselocked loop transmitter |
| WO2020075021A1 (en) | 2018-10-10 | 2020-04-16 | Cochlear Limited | Implantable medical device short-range radio synchronization |
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- 2004-01-26 EP EP04001576.0A patent/EP1448021B1/en not_active Expired - Lifetime
- 2004-02-10 JP JP2004033150A patent/JP4384515B2/en not_active Expired - Lifetime
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| CH552329A (en) | 1973-05-30 | 1974-07-31 | Bommer Ag | RADIO RECEIVER BUILT IN A HOUSEHOLD DEVICE. |
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| EP1871140A1 (en) * | 2006-05-26 | 2007-12-26 | Siemens Audiologische Technik GmbH | Hearing device with an oscillating circuit and corresponding method |
| US8483416B2 (en) | 2006-07-12 | 2013-07-09 | Phonak Ag | Methods for manufacturing audible signals |
| US9300367B2 (en) | 2011-05-06 | 2016-03-29 | Oticon A/S | Receiver and method for retrieving an information signal from a magnetic induction signal |
| WO2012171573A1 (en) * | 2011-06-17 | 2012-12-20 | Widex A/S | Hearing aid with a wireless transceiver and method of fitting a hearing aid |
| US9124993B2 (en) | 2011-06-17 | 2015-09-01 | Widex A/S | Hearing aid with a wireless transceiver and method of fitting a hearing aid |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1448021B1 (en) | 2015-04-01 |
| JP2004248281A (en) | 2004-09-02 |
| JP4384515B2 (en) | 2009-12-16 |
| AU2004200557A1 (en) | 2004-09-02 |
| DE10305833B3 (en) | 2004-08-12 |
| US7292698B2 (en) | 2007-11-06 |
| US20040175009A1 (en) | 2004-09-09 |
| DK1448021T3 (en) | 2015-07-13 |
| CN1551681A (en) | 2004-12-01 |
| CN100544502C (en) | 2009-09-23 |
| EP1448021A3 (en) | 2009-06-17 |
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