We found this circuit in the 1990 Philips Databook. The circuit is a commercial application of the decoder in stereo FM radio receivers.
This amplifier with two transistors for analog instruments was found in a Raytheon publication from the...
Using a ceramic resonator, it is possible to vary the frequency between 4.9 MHz and 5 MHz. The...
This operational filter configuration was obtained in a 1980s publication. The calculation is made by the...