Build Op Amp with Logic Gates

Discussion in 'General Electronics Chat' started by PenguInABox, Sep 12, 2012.

  1. PenguInABox

    Thread Starter New Member

    Sep 12, 2012
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    Is it posible to build an Op-Amp using only ideal logic gates?

    Alternatively, is it possible to build a unitary-gain buffer using only ideal logic gates?
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    4,195
    You can turn a CMOS inverter into a linear amplifier by connecting a feedback resistor from the output to the input.
     
  3. absf

    Senior Member

    Dec 29, 2010
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    I have never heard of a "digital op-amp"..:D

    Sorry, couldnt resist it.:p

    Allen
     
    Last edited: Sep 12, 2012
  4. Audioguru

    AAC Fanatic!

    Dec 20, 2007
    9,418
    903
    A Cmos inverter used as an analog amplifier causes distortion that compresses the top and bottom of the waveform. It might sound "good" when playing acid rock noise.

    Most audio opamps (not an awful old LM358 or LM324) have distortion so low that it can barely be measured and cannot be heard.
     
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