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.
We found this circuit in the April 1992 issue of Radio Electronics magazine. The circuit uses an...
Found in American documentation from the 1970s, this circuit is intended for amplifying analog TV...
An interesting application in case of needing to supply an operational amplifier or a very low...