This is a classic FM amplifier IF amplification stage configuration. The circuit is from a 1980s documentation. CN is the neutralizing capacitor.
This circuit, when connected to the 110 V power grid makes it possible to test capacitors with...
This water level control circuit was found in a 1980s documentation. The circuit uses a capacity...
This 80's Exar circuit has a carrier detector for frequencies up to 500 kHz. The circuit uses a...