amplitude modulator

Posted on Dec 24, 2012

This simple diode modulator delivers excellent results when used for high percentage modulation at low signal levels. Constants are shown for a carrier frequency of about 10 MHz, but, with a suitable tank, the circuit will give good results at any frequency at which the diode approximates a good switch. To extend frequency above that for which the IN4148 is suited, a hot-carrier diode (HP2800, etc.) can be substituted.

amplitude modulator
Click here to download the full size of the above Circuit.

A shunt resistor across the tank circuit can be used to reduce the circuit Q so as to permit high percentage modulation without appreciable distortion.

Leave Comment

characters left:

New Circuits



Popular Circuits

Explosive Gas Detector Circuit
pic LM032
microphone amplifier 20khz 12v
electronic mouse trap
Loudspeaker Protector Monitors Current
MCP1640 5V step up from 4V solar cells
XTR101 thermocouple input circuit diagram