VCO input voltage impedance?

Discussion in 'The Projects Forum' started by ezgihiz, Aug 11, 2008.

  1. ezgihiz

    Thread Starter New Member

    Aug 11, 2008
    Hi all
    What should be the input voltage impedance and frequency of VCO (using CD4046)

    I also wonder what ir the significance of input impedance? when I use it?
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    The data sheet for the 4046 will give that parameter. The significance of input impedance is a broad topic. For your possible application, it should be high to prevent distorting the input signal.

    You can not avoid using input impedance - it is a part of the circuit. You can adjust the impedance to alter or preserve the input signal.