This circuit uses a quadruple operational amplifier of the time. The circuit is from the 70s but can be implemented with modern operators that require the use of a symmetrical source.
Found in a 1967 EEE, this circuit oscillates at 20 MHz according to the values of the given...
The figure shows how to use the XR2206 to generate sinusoidal signals in a different way. The...
The figure shows how to implement a NOR gate with 3 inputs with common diodes and a common...