Used in radio reception, this circuit was found in the February 1983 Radio Electronics magazine. The integrated circuit is the NE570 IC, and the power supply is 3.6 V.
This circuit was found in a 1964 MOSFET applications manual. The circuit uses period general...
This circuit is from a Japanese documentation from 1971, using transistors of the time. The...
This circuit uses Only passive components and have to be plugged to the input of an audio...