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.
In the figure we have a circuit that allows us to obtain a variable voltage of approximately 0.5 to 25 V...
This interesting circuit, found in a 1997 documentation, allows you to view the characteristic curves of...
This circuit generates a tone whose frequency is set at VR1. The signal is reproduced in a...