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.
The diagram shows an AND gate implemented with an LM3900 transconductance operational. The circuit is...
Found in a Popular Electronics from the 80's, this circuit makes use of a time integrated to...
This circuit was obtained from old documentation, triggering when there is a power cut on the...