Converters - Period to Voltage


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Converters: Period to Frequency
Converters -- Main Page
Last Updated on: Friday, August 29, 2008 02:32 PM

Circuits Designed by Dave Johnson, P.E. :

PULSE PERIOD TO VOLTAGE CONVERTER
This is a test circuit converts a square wave input signal into a voltage. But, the voltage produced is proportional to the time between edges (period) of the signal, not the frequency. The range is from 100uS to to 10mS, which produces a voltage from 100mV to 10 volts. Other scale factors are also possible. The circuit is powered from single 15v supply and uses inexpensive parts. It is great when a signal's period instead of its frequency needs to be monitored.

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Converter ignores Power Supply Variations: 01/05/95 EDN-Design Ideas / (Electronic circuit design added 02/05)