Integrated phase-shift power control transmitter for use with implantable device and method for use of the same
First Claim
1. A radio frequency (RF) telemetry transmitter for use in a cochlear implant system, the RF telemetry transmitter comprising:
- a clock source configured to provide a clock signal;
a phase shifting circuit coupled to said clock source and configured to receive a delay control signal and generate a phase shifted clock signal which is phase shifted relative to said clock signal by a predetermined phase delay that is set by the delay control signal;
switching circuitry configured to receive said clock signal and said phase shifted clock signal and output a first switch signal and a second switch signal, said second switch signal being phase shifted relative to said first switch signal by said predetermined phase delay; and
a network coupled to said switching circuitry and configured to generate an output signal to be transmitted to an implantable receiver circuit within an implant part of said cochlear implant system, said output signal containing power and data in accordance with said first and second switch signals;
wherein said network is configured to adjust a power level of said output signal in response to an adjustment in said predetermined phase delay.
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Accused Products
Abstract
Systems and methods for efficiently transmitting power using a high frequency (e.g., RF) telemetry transmitter are provided. The telemetry transmitter may include a fixed clock source (which may provide a fixed clock signal), telemetry phase shift circuitry (which may include switching circuitry and phase shifting circuitry), and a push-pull network. The telemetry phase shift circuitry generates a phase shifted clock signal that is phase shifted with respect to the fixed clock signal. The fixed and phase shifted clock signals may drive the switching circuitry to produce a high frequency signal that is passed through the push-pull network. The power or magnitude of the high frequency signal is based on the phase delay between the fixed clock signal and the phase shifted clock signal.
34 Citations
18 Claims
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1. A radio frequency (RF) telemetry transmitter for use in a cochlear implant system, the RF telemetry transmitter comprising:
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a clock source configured to provide a clock signal; a phase shifting circuit coupled to said clock source and configured to receive a delay control signal and generate a phase shifted clock signal which is phase shifted relative to said clock signal by a predetermined phase delay that is set by the delay control signal; switching circuitry configured to receive said clock signal and said phase shifted clock signal and output a first switch signal and a second switch signal, said second switch signal being phase shifted relative to said first switch signal by said predetermined phase delay; and a network coupled to said switching circuitry and configured to generate an output signal to be transmitted to an implantable receiver circuit within an implant part of said cochlear implant system, said output signal containing power and data in accordance with said first and second switch signals; wherein said network is configured to adjust a power level of said output signal in response to an adjustment in said predetermined phase delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A cochlear implant system comprising:
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an external part having a radio frequency (RF) telemetry transmitter; and an implant part having an implantable receiver circuit for generating and applying a stimulation current to a selected pair of implantable electrodes; wherein said external part comprises a clock source configured to provide a clock signal, and a phase shifting circuit coupled to said clock source and configured to generate said phase shifted clock that is set by a delay control signal received by the phase shifting circuit, switching circuitry configured to receive the clock signal and the phase shifted clock signal and output a first switch signal and a second switch signal, said second switch signal being phase shifted relative to said first switch signal by said predetermined phase delay, a network coupled to said switching circuitry and configured to generate a carrier signal in accordance with said first and second switch signals, and an antenna coil configured to transmit said carrier signal to said implantable receiver circuit; wherein said network is configured to adjust a power level of said carrier signal in response to an adjustment in said predetermined phase delay. - View Dependent Claims (12, 13, 14)
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15. A radio frequency (RF) telemetry transmitter for use in a cochlear implant system, the RF telemetry transmitter comprising:
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switching circuitry configured to receive a clock signal and a phase shifted clock signal and output a first switch signal and a second switch signal, said second switch signal being phase shifted relative to said first switch signal by a predetermined phase delay that is set by a delay control signal; a network coupled to said switching circuitry and configured to generate a carrier signal in accordance with said first and second switch signals, and an antenna coil configured to transmit said carrier signal to said implantable receiver circuit; wherein said network is configured to adjust a power level of said carrier signal in response to an adjustment in said predetermined phase delay. - View Dependent Claims (16, 17, 18)
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Specification