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.
This circuit was obtained in an Electronque Loisirs magazine from France, in a July 1991 edition. It...
This circuit has an improvement over the previous one as it also has an LED indicator for correct...
We found this third-order Butterworth asymmetric filter in an old manufacturer documentation. The...