voltage amp

Discussion in 'General Electronics Chat' started by wol6, Sep 21, 2005.

  1. wol6

    Thread Starter New Member

    Sep 21, 2005
    4
    0
    hi all
    new it all this so please help

    i'm after a amplifer to amp a voltage

    i have a circiut working on 5 volts ,
    i have a output from 0-5volts
    i need a circiut that will change the reads to the reads below

    input output
    0.5v 0.9v
    1.0v 1.8v
    2.0v 2.6v
    3.0v 3.4v
    4.0v 4.3v

    all appox voltages give or take .25v
    many thanks wol
     
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    I think this can´t be done by usual amplifier. You can use some digital procesor, compressor like CA3080, or something in the stylo of a logaritmic or exponential converter.

    Why do you need such a strange conversion?
     
  3. wol6

    Thread Starter New Member

    Sep 21, 2005
    4
    0
    hi
    i want to increase a voltage out but from a sensor by 80% extra in the 0-2volt and then going to more 30-40% increase after 3-4 volts
    so the control unit thinks its reading are higher
    many thanks
    wol
     
  4. Brandon

    Senior Member

    Dec 14, 2004
    306
    0
    Its better to have your sensor give data linearly and then do your tweaking within a micro where you will have better control and ease of modification.
     
  5. wol6

    Thread Starter New Member

    Sep 21, 2005
    4
    0
    hi
    anybody got a diag of the circuit that i would need

    battery voltage = 5
    earth = body
    input = 0-5 volts
    output = 0-5volts(appox 60-80% higher than going in

    + possiblity of controled by a varible resistor controling the output

    i.e changing the output from say 30%-80% increase
    many thanks
    wol @
    scott.welsby@btopenworld.com
    or links to site's with info
     
  6. wol6

    Thread Starter New Member

    Sep 21, 2005
    4
    0
    sorry i didn't say its a dc voltage
     
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