We found this receiver on a single chip in the 1976 Siemens integrated circuits manual. The circuit is of the super heterodyne type using ceramic filter in the IF.
This amplifier must be supplied with a voltage of 24 V and the resting current is of the order of 4...
This circuit is from a magazine 73 for radio amateurs of the 90s. The circuit generates the high...
This circuit generates quadrature signals in frequency that depend on the 18 pF capacitors. These...