This circuit was obtained from the Encyclopedia of Electronic Circuits volume 5 of 1995. The circuit uses the 4001 CMOS to obtain hysteresis in the sensor feedback.
The purpose of this circuit is to detect audio that amplitude modulates an RF carrier. The circuit is...
This crystal filter is normally used in receivers and the frequency depends on the crystal used...
We found this circuit in documentation from National Semiconductor. For the medium wave range the...