Patent ID: 8027732

Claim:
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.