C.M.R.R. analysis of the 3-op-amp instrumentation amplifier

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C.M.R.R. analysis of the 3-op-amp instrumentation amplifier

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© The Institution of Electrical Engineers
Published

The c.m.r.r. performance of the 3-op-amp instrumentation amplifier is analysed and shown to be, in general, no better than that of a single-op-amp differential amplifier. Only under rather special conditions does the more elaborate amplifier have a c.m.r.r. advantage.

Inspec keywords: operational amplifiers

Other keywords: CMRR analysis; 3-op amp instrumentation amplifier; common mode rejection ratio

Subjects: Signal processing and conditioning equipment and techniques; Amplifiers

References

    1. 1)
      • D.F. Stout , M. Kaufman . (1976) , Handbook of operational amplifier circuit design.
    2. 2)
      • J.K. Roberge . (1975) , Operational amplifiers; theory and practice.
    3. 3)
      • J.I. Smith . (1971) , Modern operational circuit design.
    4. 4)
      • P. Garrett . Optimize transducer/computer interfaces. Electron. Des. , 11 , 178 - 181
    5. 5)
      • D.H. Sheingold . (1972) , Analog-digital conversion handbook.
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