analog multiplier

Discussion in 'General Electronics Chat' started by mokhoo, Jan 20, 2006.

  1. mokhoo

    Thread Starter New Member

    Jan 20, 2006
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    i want to make an AC voltage multiplier circuit using opamps,

    is it posible????
     
  2. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
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    Yes it is possible. If you are referring to multiplying two ac signals, then please read this post.
     
  3. mokhoo

    Thread Starter New Member

    Jan 20, 2006
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    thx, but i mean a multiplier circuit using op amps, like summing amp, diffrentiator,.............
     
  4. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
    4
    If you read that post carefully you'd find the approaches to design an analogue multiplier. Please refer to the paragraphs that mention the approaches using log amplifiers and amplitude modulation (with certain caveats).

    In short, you could implement the multiplier with two log amplifiers, a summer and an inverse log amplifier, which could all be designed with op-amps.
     
  5. mokhoo

    Thread Starter New Member

    Jan 20, 2006
    3
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    thanx very much for this information.


    but i have a silly question, does log amplifier work with AC voltage??
     
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