Low Frequency Doubler MC1556G (CB14564E)

This circuit is from Motorola's 1990 Linear Databook. The circuit employs a component that is no longer common today.

3-Gate Triggered Oscillator (CB25332E)
Using 3 ports, this rectangular oscillator was found in the March 1996 issue of Electronics Now...
Video Fadder (CB4915E)
This circuit for analog video signals was obtained from a Linear Technology documentation from the 1990s. The...
PUT with 2 Transistors (CB4216E)
The circuit shown simulates a programmable unijunction transistor (PUT). Transistors may be common...