A flexible biphasic pulse generating and accurate charge balancing stimulator with a 1μW neural recording amplifier

Hosung Chun,Omid Kavehei,Nhan Tran,Stan Skafidas

ISCAS（2013）

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摘要

In this paper, we present a flexible biphasic pulse generating and accurate charge balancing stimulator with a 1μW neural recording amplifier. To achieve accurate charge balance, the stimulator is implemented using a dynamic current copying technique. It can generate a biphasic current pulse with an anodic scaling feature. To reduce power consumption, the recording amplifier is implemented to operate with 1V, while the stimulator works with 3V supply. They are implemented using a 65nm CMOS process. Simulation results show charge balance of less than 2% error in current pulses. The recording amplifier has an input referred noise of 4.5μVrms and passband from 1.5Hz to 5KHz with the power consumption of 1μW.

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关键词

cmos process,cmos integrated circuits,flexible biphasic pulse generating stimulator,bioelectric potentials,neurophysiology,power 1 muw,size 65 nm,passband,amplifiers,current pulse,prosthetics,voltage 3 v,charge balance,voltage 1 v,input referred noise,frequency 1.5 khz to 5 khz,dynamic current copying technique,accurate charge balancing stimulator,anodic scaling feature,simulation result,biomedical electronics,neural recording amplifier,power consumption reduction,transistors,noise,simulation,electrodes

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