I want to Build a voltage controlled AGC circuit

Discussion in 'General Electronics Chat' started by PSIR, Feb 14, 2011.

  1. PSIR

    Thread Starter Member

    Apr 23, 2008
    29
    0
    I'd like to build a voltage controlled AGC circuit.
    Assume that threr is a OPA inverted amplifier.
    Depend on the feed-back voltage on the load to adjust gain of inverted amplifier.
    Then it will maintain the current through the load in a fixed range.
    How do I design the circuit and can achieve the function?

    Sincerely
     
  2. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,170
    395
    An analog opto coupler makes a good control element, old ones used filament bulb, now it's LEDs with LDR. Can be home built.
     
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