This circuit was found in a 1970 IEEE publication. The circuit functions as a voltage controlled variable resistor and can be used with audio signals. Transistors admit current equivalents.
This circuit is suggested by a 1965 General Electric documentation. The triac must be in...
We found this circuit in 1980s documentation. It can be used independently as CW or by exciting a...
This 80's Motorola circuit can generate 100 MHz signals, but they can reach 200 MHz with the...