(2018) Capacitively-Coupled Chopper Instrumentation Amplifiers : an Overview 

Authors:
Qinwen Fan, Kofi Makinwa
Abstract:
CCIAs have been extensively explored over the past decade. Major improvements include techniques to boost input-impedance, robustly bias the virtual ground, improve immunity to large AC CM interference, achieve beyond-the-rails CMVR capability. Together with low offset, low 1/f noise and high power efficiency, CCIAs have become more and more popular in many applications such as biomedical readout, HV current sensing, and LV power-efficient sensing interfaces.