CMIA Based on Op-Amp Power Supply Current Sensing Technique

  • Leila Safari
  • Giuseppe Ferri
  • Shahram Minaei
  • Vincenzo Stornelli
Part of the Analog Circuits and Signal Processing book series (ACSP)


In vast majority of operational amplifiers, output transistor current is not independently accessible. Op-Amp power supply current sensing is a simple technique for detecting output transistor current from the Op-Amp power supply leads. This technique was first introduced in 1979 to implement voltage controlled current sources and current controlled current sources [1]. It has been implemented by connecting current mirrors to Op-Amp supply leads and makes possible to gain access to output transistor current separately.


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Leila Safari
    • 1
  • Giuseppe Ferri
    • 2
  • Shahram Minaei
    • 3
  • Vincenzo Stornelli
    • 2
  1. 1.TehranIran
  2. 2.University of L’AquilaL’aquilaItaly
  3. 3.Doğuş UniversityIstanbulTurkey

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