We found this circuit in the August 1994 issue of Electronics Now magazine. The circuit is based on the now uncommon CMOS 4046. The frequency range is given by C1.
This circuit generates a constant current given by R1. The load is on the high side of the feed...
This selectivity multiplier circuit for 455 kHz IF receivers was found in American documentation from the...
PTT or Push to Talk is the control that switches the speak-hear function on a transceiver. This circuit...