The original purpose of this circuit, which we find in old American documentation, is to modulate an RF carrier for telecommunications applications. Transistors support equivalents.
This coupler allows the triggering of a TTL port or flip-flop from an SCR. The resistor R must be...
This amplifier with very high input impedance was suggested by Texas Instruments in a manual of...
This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of...