A CMOS AM demodulator for instrumentation applications

ABSTRACT

This paper describes the design of a CMOS IC AM demodulator.Design details of the monolithic implementation ofa highly accurate synchronous rectifier in a standard 0.35 µmCMOS process on a ±2.5 V voltage supply are presented.The derived circuit implements an envelope detector with a ±1.5 V output swing on a 15 pF load. Small distortion(THD = .60 dB) and low noise (SNR = 84.7 dB) aresome attractive features of the proposed design.

REFERENCES

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INDEX TERMS

Primary Classification:
  B. Hardware
  B.7 INTEGRATED CIRCUITS
      B.7.2 Design Aids
          Subjects: Verification

General Terms:
Design

Keywords:
AM demodulator, cavitation detector, ideal rectifier, integrated circuits