This old version of analogue switch was found in a 1969 documentation. Components of the time are used, with emphasis on the CAG7 integrated circuit. It is worth as a reference.
Found in an 1868 Mullard documentation this circuit has a dynamic range of 10 Hz to 25,000 Hz....
This circuit was found in documentation from the 1980s. The integrated circuit is from the time...
This circuit is from 1986 documentation, being adaptable in radios of that time. The circuit uses the...