Transcutaneous Modulated Power Link for a Medical Implant
First Claim
8-1. A method as claimed in claim 1 wherein there is provided a frequency ratio between frequencies used in the pulse width modulation and the digital modulation.
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Accused Products
Abstract
A medical implant system such a Direct Acoustic Cochlear Stimulation and method for generating a transcutanous link between an external module and an internal module. A signal is generated in the external module by modulating an input signal using pulse modulation and then further modulating the pulse modulated signal using digital modulation. In the internal module, the received signal is processed using digital demodulation, the digitally demodulated signal being applied to the input of an amplifier to generate a control signal to control an actuator of the implant. A power component may also be extracted from the received signal in the internal module.
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Citations
33 Claims
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8-1. A method as claimed in claim 1 wherein there is provided a frequency ratio between frequencies used in the pulse width modulation and the digital modulation.
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10. A method of providing a control signal to an actuator of an implanted hearing device, the method comprising:
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receiving a transmission signal comprising a pulse modulated electrical signal further modulated using digital modulation; digitally demodulating the received transmission signal to remove the digital modulation; and applying the demodulated signal to an input of an amplifier to provide the control signal for the actuator. - View Dependent Claims (11, 12, 13)
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14. An external module of a hearing implant system for processing an external signal for transmitting transcutaneously to an implanted internal module of the hearing implant system, the external module comprising:
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an input for receiving the external signal and for converting the received external signal into an electrical signal; a pulse modulator for modulating the electrical signal to provide a pulse modulated signal; a digital modulator for modulating the pulse modulated signal to provide a transmission signal; and an antenna for transmitting the transmission signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An internal module of a hearing implant system comprising:
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a receiver for receiving a transmission signal comprising a pulse modulated electrical signal further modulated using digital modulation; a digital demodulator for digitally demodulating the received transmission signal; and an amplifier for receiving the digitally demodulated signal and for providing a control signal to an actuator. - View Dependent Claims (25, 26, 27, 28)
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29. A Direct Acoustic Cochlear Stimulator system comprising:
an external module comprising; an input for receiving an external signal and for converting the received external signal into an electrical signal; a pulse modulator for modulating the electrical signal to provide a pulse modulated signal; a digital modulator for modulating the pulse modulated signal to provide a transmission signal; and an antenna for transmitting the transmission signal; and an internal module comprising; a receiver for receiving the transmission signal; a digital demodulator for digitally demodulating the received transmission signal; and an amplifier for receiving the digitally demodulated signal and for providing a control signal to an actuator. - View Dependent Claims (30, 31, 32, 33)
Specification