This is a classic FM amplifier IF amplification stage configuration. The circuit is from a 1980s documentation. CN is the neutralizing capacitor.
This voice scrambler circuit was obtained from an American 1990s documentation. Used operational...
August 2016 - The new Schottky diodes from Vishay's ESMP series for surface mounting can now be...
September 2017 - Texas Instruments PCM186x and PCM186x-Q1 Audio ADCs can be found at Mouser...