This circuit makes use of a constant current source to control the temperature of a direct current heating element. The integrated circuit must be mounted on a heat sink.
This circuit was found in General Electric documentation from 1964. It makes use of a PUT, called the...
This mid-frequency amplifier circuit was found in an American publication from the 1950's. The...
The circuit with a common operational amplifier uses a zener as a reference. The circuit is from...