A CMOS Instrumentation Amplifier With 90-dB CMRR at 2-MHz Using Capacitive Neutralization: Analysis, Design Considerations, and Implementation

@article{Worapishet2011ACI,
  title={A CMOS Instrumentation Amplifier With 90-dB CMRR at 2-MHz Using Capacitive Neutralization: Analysis, Design Considerations, and Implementation},
  author={Apisak Worapishet and Andreas Demosthenous and Xiao Liu},
  journal={IEEE Transactions on Circuits and Systems I: Regular Papers},
  year={2011},
  volume={58},
  pages={699-710}
}
The benefits of using “current feedback” in instrumentation amplifier (IA) design are well known. In this paper, we analyze the mismatch mechanisms, both random and systematic types, which influence the common-mode rejection ratio (CMRR) performance of the local current feedback IA topology. We derive analytical expressions for the common-mode gain frequency response due to random mismatches (transconductance, drain-source conductance and parasitic capacitance) and verify the integrity of the… CONTINUE READING
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