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This paper presents a configurable CMOS integrated circuit front-end for the recording of a wide range of biopotentials (ExG). The system offers a choice between a single-differential or double-differential recording channel topology, wide continuously adjustable gain range (37–66 dB), selectable CMOS or BJT input stages, offset compensation, differential and buffered single-ended voltage output....
A fully integrated variable gain amplifier circuit is reported in this paper. The amplifier is based on an integrating topology allowing the gain to be controlled by the timing of a clock signal. The recording of physiological signals such as the electroneurogram (ENG) or electromyogram (EMG) is a targeted application. Therefore, low-noise performance and low power consumption are important. Simulated...
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