Using Differencial Amp. Instead of Op-Amp

Discussion in 'Homework Help' started by kampfer, Dec 10, 2014.

  1. kampfer

    Thread Starter Member

    Nov 11, 2014
    32
    0
  2. #12

    Expert

    Nov 30, 2010
    16,247
    6,739
    google, "differential amplifier"

    Here's one now!
     
  3. #12

    Expert

    Nov 30, 2010
    16,247
    6,739
    Your other choice is to decide a differential amplifier is a circuit configuration using an op-amp.
     
  4. kampfer

    Thread Starter Member

    Nov 11, 2014
    32
    0
    oh sorry for forgetting existance of GOOGLE. i know what diff. amp. is, i know what op-amp is, but i cannot find any solution to design diff. amp. version of an op-amp.
     
  5. MrChips

    Moderator

    Oct 2, 2009
    12,414
    3,353
    There might be some confusion with terminology.

    Most op-amp chips are differential amplifiers. Differential = difference.

    There is a common three-opamp configuration called instrumentation amplifier. The goal of such a circuit is to have very high Common Mode Rejection Ratio (CMRR).

    [​IMG]


    Google instrumentation amplifier.

    http://en.wikipedia.org/wiki/Instrumentation_amplifier
     
  6. MrChips

    Moderator

    Oct 2, 2009
    12,414
    3,353
  7. crutschow

    Expert

    Mar 14, 2008
    12,972
    3,219
    Why do you want to replace the op amps in that audio amp with differential amplifiers? :confused:
     
Loading...