The integrated circuit used in this circuit from a 1987 documentation is no longer common today. This circuit can generate a multitude of different sounds and this circuit is an example of application.
This two-transistor constant current source is from a 1968 documentation. Modern equivalent...
We found this circuit in an old documentation. The integrated circuits used are specific to...
This circuit was found in a 1964 Electronic Design. The circuit can be implemented with equivalent...