Design of an integrated low power high CMRR instrumentation amplifier for biomedical applications
Proceedings of the 20th annual conference on Integrated circuits and systems design
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An instrumentation amplifier is described. which is based on the classical current-balancing technique that ensures this type of circuit to achieve high immunity to common-mode signals. In the particular case of the circuit herein described. a CMRR of I lOdB was attained, thanks specially to improving the current mirror that balances the current between the input and the output stages of the amplifier. Prototypes of the circuit were fabricated in O.6µ CMOS using MPW (Multi-Project Wafer) services and were fully characterized.