Abstract
The potentiostat system consisting of a constant voltage driving negative feedback circuit is very useful in understanding of electrochemical interfacial phenomena. This paper proposes a designing method for a simplified potentiostat circuit for biomedical instrumentations and bio-sensors, by using conventional op-amplifiers and instrumentation amplifiers. The ranges are 10μV∼10mV, 0.1nA∼10mA in the frequency of 10Hz∼10kHz. Results of the loop frequency characteristics, the intrinsic noises and the Lissajous characteristic of a designed potentiostat consisting of low noise and low bias-current op-amps. and instrumentation amps. are shown.
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