OPAMP- Can we replace opamp with any other electronic component

Discussion in 'The Projects Forum' started by md yasir, Nov 2, 2015.

  1. md yasir

    Thread Starter New Member

    Sep 14, 2015
    16
    0
    can we replace opamp with any other electronic component
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,979
    2,461
    Hello,

    An opamp is a large conjuction of componenents.
    They can not be replaced with a single electronic component, but an other opamp.

    Ever had a look at the internal schematic of an opamp?

    LM741_internal_schematic.png

    This is the internal schematic of the old LM741.

    Bertus
     
  3. DickCappels

    Moderator

    Aug 21, 2008
    2,928
    723
    What do you mean by the term "replace"? Does your question ask whether a circuit that would normally use an opamp could be designed without and opamp, or does your question ask whether another component(s) can be placed in an existing circuit in place of an opamp?

    A few years ago I replaced a broken high speed opamp with a discreet transistor-only amplifier because I didn't have the patience to wait for a replacement high speed opamp to me sent to me.
     
    md yasir likes this.
  4. AnalogKid

    Distinguished Member

    Aug 1, 2013
    4,837
    1,337
    As a lab project while in school, I designed and built a complete home stereo amplifier channel with nothing but CMOS 4069 unbuffered inverters. Phono cartridge input, RIAA equalization, treble and bass tone controls, and a BTL class D output stage. Limited bandwidth, unimpressive distortion, and not much speaker power, but it did work.

    ak
     
    md yasir likes this.
  5. #12

    Expert

    Nov 30, 2010
    16,864
    7,521
    As AK demonstrated, there are ways around using an op-amp, but there is no such thing as one component that can replace an op-amp. I can imagine using a single bjt base and emitter as a differential input, but the output...how can one, single, collector do all the things an op-amp does?
     
  6. OBW0549

    Well-Known Member

    Mar 2, 2015
    1,428
    987
    No.
     
    #12 likes this.
  7. md yasir

    Thread Starter New Member

    Sep 14, 2015
    16
    0
    thanks
     
  8. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,451
    1,068
    about thirty transistors and resistors...
     
Loading...