Circuitry for a wireless microsystem for neural recording microprobes

Integrated circuits for use in a wireless microsystem used in neural recording are described. The implantable microsystem will be powered and transmit digitized data using RF telemetry. Recorded neural signals are amplified, multiplexed, digitized using a 2/sup nd/ order sigma-delta modulator, and then transmitted to the outside world by an on-chip transmitter. The circuit is designed using a standard 1.5 /spl mu/m CMOS process. Several circuit blocks have been designed, fabricated and show to operate as expected.

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