A fully integrated neural recording amplifier with DC input stabilization

  title={A fully integrated neural recording amplifier with DC input stabilization},
  author={Pedram Mohseni and Khalil Najafi},
  journal={IEEE Transactions on Biomedical Engineering},
This paper presents a low-power low-noise fully integrated bandpass operational amplifier for a variety of biomedical neural recording applications. A standard two-stage CMOS amplifier in a closed-loop resistive feedback configuration provides a stable ac gain of 39.3 dB at 1 kHz. A subthreshold PMOS input transistor is utilized to clamp the large and random dc open circuit potentials that normally exist at the electrode-electrolyte interface. The low cutoff frequency of the amplifier is… CONTINUE READING
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