Posternak Blankstein & Lund LLP
Instrumentation amplifier with digitally programmable input capacitance cancellation
An instrumentation amplifier that includes input capacitance cancellation is provided. The architecture includes programmable capacitors between the input stage and a current feedback loop of the instrumentation amplifier to cancel input capacitances from electrode cables and a printed circuit board at the front end. An on-chip calibration unit can be employed to calibrate the programmable capacitors and improve the input impedance.
Northeastern University
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Marvin Chun-hsiang
Onabajo Chang