VCO input voltage impedance?

Thread Starter


Joined 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?


Joined 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.