The circuit is of the Motorola Linear Databook of 1990. The power source must be symmetrical and the characteristics of the circuit are given next to the diagram.
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...