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.
Found in an English Maplin documentation from 1983, this circuit generates separate frequency...
This is the circuit of an old commercial amplifier from Fapesa (Philips Argentina) from the 1970s....
The circuit is from the Linear Application Handbook. The resistors determine the voltage applied to...