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, found on Motorola's Linear Interface ICs uses the MC1536 as a driver for a 36 W or...
In the figure we have the conventional configuration to use a triac to control a power load from...
We find this oscillator in a 1980s documentation. The frequency depends on the crystal and the...