442 / 2019-02-27 12:07:46

A Gain & Bandwidth Reprogrammable Neural Recording Amplifier with Leakage Reduction Switches

neural recording amplifier, reprogrammable arrays, leakage reduction, high off-resistance switch

全体主题 > Biomedical Circuits

The off-resistance non-ideal effect of MOSFET switches in reprogrammable neural recording amplifiers has been analyzed in this paper. Then a novel leakage reduction switch structure for feedback impedance arrays is proposed to extended low frequency bandwidth. As a case study, a low-noise, wide gain and bandwidth reconfigurable neural recording amplifier has been designed and simulated in a 0.18μm CMOS process. Simulated characteristics of the amplifier include tunable gain of 20~40dB, programmable low-cutoff frequency of 0.025~125Hz, high-cutoff frequency of 1~125 kHz, respectively. The input referred noise is 6.75μVrms (0.5~11.4kHz, 40dB) and the power consumption is 8.1μW.