Wireless circuits design for neural recording application

A couple of radio-frequency integrated circuits working at 2.4G-2.5GHz are presented as wireless transmitter and receiver for neural signal recording application. The transmitter is consisted of a two bits digital logic controlled voltage control oscillator with cross-coupled to provide the carrier, an on-off keying modulator for bandwidth and power consumption consideration and a power amplifier based on IEEE STD802.15 transmitter characteristics. The receiver contains a low noise amplifier and an on-off keying demodulator. Fabricated in a 0.18 μm CMOS process and tested in a neural acquisition system, the IC prototype occupies 2.88mm² and works functionally, which can be a wide solution for wireless neural signal processor.