opamp design

Discussion in 'General Electronics Chat' started by CHIDANND, Nov 25, 2015.

  1. CHIDANND

    Thread Starter New Member

    Nov 25, 2015
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    0
    Hi sir,
    Actually i need the clarification that
    1)Is it possible to design a opam which gives output of 2.5v w/o any input
    2)with input 5V it should provide the output as 2.75V
    Hoping for your favorable response..
    Thanking you sir,

    Regards:
    Chidanand M
    (email address removed by moderator)
     
    Last edited by a moderator: Nov 25, 2015
  2. DickCappels

    Moderator

    Aug 21, 2008
    2,664
    634
    Is what you are asking for a circuit using a opamp? If so, the answer is "yes".
     
  3. Bordodynov

    Active Member

    May 20, 2015
    643
    188
    See

    Perversion.png
     
    DickCappels and ErnieM like this.
  4. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    Do you want the output to go from 2.5V to 2.75V as the input goes from 0V (or floating) to 5V?
    Or does @Bordodynov 's solution get at the problem?

    If so, the required gain is (2.75-2.5)/(5-0) = 0.05
    the required offset is (2.5-0) = 2.5V?

    This can be done with just a power supply and a resistive network; no opamp required.
     
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