The integrated circuit used in this 1975 application no longer exists, and it is also not indicated in the original diagram and must be of the TAA series by the diagram.
This circuit uses an unusual electromechanical component: a mechanical blade resonator. The...
This circuit from a Japanese publication in 1968 uses germanium transistors from the time like the...
Found in a 90s Electronic Design, this circuit can provide a relatively high-power output. The basic...