Frequency-to-volt age converter

Posted on Jun 30, 2012

This circuit converts frequency to voltage by taking the average dc value of the pulses from the 74121 monostable multivibrator. The one shot is triggered by the positive-going ac signal at the input of the 529 comparator. The amplifier acts as a dc filter, and also provides zeroing. The accuracy is 2% over a 5 decade range

Frequency-to-volt age converter
Click here to download the full size of the above Circuit.

The input signal to the comparator should Jbe greater than 0 volt peak-to-peak, and less than 12 volts peak-to-peak for proper operation.

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