We found this balanced modulator circuit for DSB and possibly SSB transmissions in US 1980s telecommunications documentation. The diodes can be replaced with equivalents.
We found this circuit in a publication of 1991. The audio amplifier is an operational that admits...
This circuit has appeared on our site several times as a battery status monitor. In this...
When this circuit picks up a louder sound it produces a pulse that briefly charges the 10 uF...