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.
The transistors of this circuit may be general purpose and the power supply comes from the TTL...
We found this circuit with the CMOS4046 in the August 1994 Electronics Now magazine. The circuit is...
This setting appears with variations at various points on this site. This is from a Motorola...