6 V power supply with power zener (CB21531E)

This circuit provides 6.3V of output from a 9V input. The circuit was found in a Dutch publication from 1966.

1MHz XTAL 4001 Oscillator (CB11868E)
This circuit has its frequency controlled by a 1MHz crystal. The circuit can be powered by...
Neural Comparator (CB4831E)
This circuit, found in a 2000 documentation, is used in simple artificial intelligence and robotic...
Video switch (CB21318E)
Found in National Semiconductor documentation from the 1990s, this circuit switches video signals to...