AC instrumentation amplifier for bioimpedance measurements

@article{PallasAreny1993ACIA,
  title={AC instrumentation amplifier for bioimpedance measurements},
  author={Ramon Pallas-Areny and John G. Webster},
  journal={IEEE Transactions on Biomedical Engineering},
  year={1993},
  volume={40},
  pages={830-833}
}
The input impedance and common-mode rejection ratio requirements for an amplifier for bioimpedance measurements are analyzed, considering the capacitive components of the electrode-skin contact impedance. An AC-coupled instrumentation amplifier that fulfills those requirements, and provides both interference and noise reduction and a zero phase shift over a wide frequency band without using broadband operational amplifiers, is described.<<ETX>> 

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