Describes a low-power, low-noise CMOS instrumentation amplifier designed for medical applications with variable gain settings.
A CMOS low-power low-noise monolithic instrumentation amplifier (IA) is described. The power drain is reduced by use of current feedback and by use of only single-stage operational transconductance amplifiers in the low-frequency loop. The bandwidth of the IA is designed for medical purposes (0.5-500 Hz) and it can produce variable gains of 14/20/26/40 dB, which are set by control software.
Steyaert et al. (Tue,) studied this question.
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