| 摘要 |
A circuit and method for cochlear implant telemetry where digital data is encoded into an RF signal. The RF signal is applied via a rectifier diode to a first switch matrix S 1 and a second switch matrix S 2 , with S 1 being coupled to a first sampling capacitor C 1 and S 2 being coupled to a second sampling capacitor C 2 . A local oscillator signal with period T is applied that controls S 1 and S 2 , cyclically coupling C 1 and C 2 to the RF signal, a first input to a comparator, and ground. The comparator compares the first input to a DC reference voltage. The output of the comparator is then sampled via a flip flop clocked by the local oscillator, with the flip flop outputting a data bit stream representative of the envelope of the RF signal having encoded information.
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