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Multiplying Voltages?

Discussion in 'General Electronics Discussion' started by Lightning, Oct 15, 2013.

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  1. Lightning

    Lightning

    45
    4
    Oct 12, 2013
    Hello,

    I am trying to design a circuit that will multiply two voltages together like a voltage controlled amplifier but I am not sure how to go about doing this, any help would be appreciated?

    Thank you.
     
  2. Laplace

    Laplace

    1,252
    184
    Apr 4, 2010
    Is your intent to design a circuit around a core multiplier chip such as the MPY534, or try to duplicate the circuitry within multiplier chip itself?
     
  3. Lightning

    Lightning

    45
    4
    Oct 12, 2013
    I would like to understand how the circuitry works rather than relying on an IC it gives me much more flexibility to change any parameters. :)
     
  4. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,267
    Nov 28, 2011
    As usual, describe your application.

    As usual, Google is your friend.
     
  5. Lightning

    Lightning

    45
    4
    Oct 12, 2013
    Well I am designing an amplitude modulator for an AM transmitter, so I need to multiply the voltages of two sine waves together.
     
  6. Harald Kapp

    Harald Kapp Moderator Moderator

    9,500
    1,957
    Nov 17, 2011
    Google amplitude modulator, look up Gilbert cells - they are just one way of multiplying small signals.
     
  7. Lightning

    Lightning

    45
    4
    Oct 12, 2013
    Excellent I will look into it. :)
     
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