2002•Journal of Jianghan Petroleum InstituteRequires access
Circuit Design of Measurement Amplifier
Hongtao Wu
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Abstract
A measurement amplifier circuit is designed, which consists of circuits of differential amplifier,a common-mode rejection, double-end and single-end conversions and programmed gain amplifier. The circuit diagrams and design methods of each amplifier are given. The amplifier circuit is an internal continuous program control circuit. The methods for improving the amplifier common-mode rejection ratio and programming 0.5 gain step are discussed.