Your browser is out-of-date!

Update your browser to view this website correctly. Update my browser now

Close

AM Modulation Monitor | Electronics Lab

AM Modulation Monitor
Version 1 - Last update: Dec 1, 2015

An op-amp AM modulation monitor using the rectified AC of the incoming signal.

A full wave bridge rectifier followed by a pair of op-amps for detecting DC departures from the un-modulated carrier level.

Hypothesis: A DC reference is set by rectifying the un-modulated carrier. Then 100% positive peak modulation would occur when the instantaneous DC value of the rectified wave is 2x Ref. And 100% negative peak modulation would occur when the instantaneous DC value of the rectified wave is zero volts.

Comments disabled