Title :
Low gain-error instrumentation amplifier for current sensing
Author :
Wang, Jiongming ; Ge, Fuding ; Yang, Shengqi ; Lin, Xinnan ; He, Jin
Author_Institution :
Precision Chips Co., Ltd., Wuxi, China
Abstract :
This paper presents the design of a low gain-error pseudo rail-to-rail indirect current feedback instrumentation amplifier (In-Amp). In order to reduce the gain error introduced by the input common mode voltage variations, MOS transconductors regulated by specially designed folded-cascoded amplifier are used. Simulated gain error is only about 0.2% with input common mode voltage ranging from half VDD to VDD.
Keywords :
electric current measurement; electric sensing devices; instrumentation amplifiers; MOS transconductors; current sensing; gain error; half VDD; input common mode voltage ranging; input common mode voltage variations; low gain-error instrumentation amplifier; rail-to-rail indirect; CMOS integrated circuits; CMOS technology; Educational institutions; Instruments; Irrigation; MOS devices; current sensor; gain error; instrumentation amplifier;
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2010 IEEE International Conference of
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-9997-7
DOI :
10.1109/EDSSC.2010.5713692
