This is yet another balanced modulator circuit for SSB transmission. This two-diode circuit was found in a 1980s documentation. The diodes are commonly used.
The circuit presented emulates an OR gate with the LM3900, operational transconductance amplifier....
This circuit was obtained from a 1962 magazine. It can still be mounted to be powered from 6 V...
The figure shows how to implement a conventional current monitor with differential amplifier on an H...