amplifier

Discussion in 'General Electronics Chat' started by pinoyballer, Dec 8, 2007.

  1. pinoyballer

    Thread Starter Member

    Oct 31, 2007
    11
    0
    when i simulated an amplifier in pspice the two inpute terminal were not the same. why. i thought they should be.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    with two inputs, the amp is probably a differential one. That means that one input will follow the input, and the other will invert it.
     
  3. cumesoftware

    Senior Member

    Apr 27, 2007
    1,330
    10
    Two inputs are very handy. Not only you can build a inverting or non-inverting amplifier, but also you can set the gain. Operational amplifiers have two inputs and a very large gain. The gain is normally unstable, but with a negative feedback network you can build a very stable amplifier. Of course, op-amps have many purposes. They are the most versatile amplifiers you can find.
     
  4. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,669
    804
    The other input is at the same voltage only if there is feedback involved, and the amp isn´t near clipping conditions.
     
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