Sensitive rf voltmeter

Posted on Nov 17, 2012

This circuit measures RF voltages beyond 200 MHz and up to about 5 V. The diode should be mounted in a remote probe, close to the probe tip. Sensitivity is excellent and voltages less than 1 V peak can be easily measured

Sensitive rf voltmeter
Click here to download the full size of the above Circuit.

The unit can be calibrated by connecting the input to a known level of RF voltage, such as a calibrated signal generator, and setting the calibrate control.

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