This circuit was found in an American 1980s documentation. The transistorized step is the receiver's last IF and the diode is the receiver's existing detector.
We found this circuit in a 1966 documentation. The circuit is intended for a door opening system by the...
This circuit is from a April 1991 Popular Electronics. The magazine no longer exists, but the...
This oscillator with operational and CMOS buffers generates complementary signals. The circuit is...