A Precision CMOS Amplifier Using Floating-Gate Transistors for Offset Cancellation

  title={A Precision CMOS Amplifier Using Floating-Gate Transistors for Offset Cancellation},
  author={Venkatesh Srinivasan and G. J. Serrano and John Gray and Paul Hasler},
  journal={IEEE Journal of Solid-State Circuits},
A long-term offset cancellation scheme that enables continuous-time amplifier operation is described. Offset cancellation is achieved by programming floating-gate transistors that form an integral part of the amplifier's architecture. The offset voltage of a single-stage folded cascode amplifier has been programmed to a minimum of plusmn25 muV in a 0.5 mum digital CMOS process. The long-term offset voltage drift has been calculated to be less than 0.5 muV over a period of 10 years at 55degC… CONTINUE READING
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