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Voltage-Controlled Variable Capacitor

Discussion in 'LEDs and Optoelectronics' started by Yoa01, Nov 6, 2012.

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  1. Yoa01


    Jun 18, 2012
    Hi all,

    This is a different idea altogether from the synth I'm building.

    So I have this idea for a band-variable vocoder. Knowing how vocoders work and how to make them, I would need a variable capacitor in the nanofarad range for this to work. Now, I'm already having problems just finding a variable cap in that range, but it gets better: I want it to be voltage controlled as well.

    Sure, it's always possible to make one, but I was curious as to if such devices even exist. The best thing I can think of is to use a capacitance multiplier circuit, which can of course accept a varying voltage and alter capacitance like that.

    Any other ideas?
  2. Timescope


    Aug 30, 2012
  3. Yoa01


    Jun 18, 2012
    Similar to a multiplier, but actually seemingly more practical. It seems that making it variable could be difficult, however. I'll look into it. Thanks!
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