1 kHz low pass filter (CB7579E)

This filter can be implemented with almost any operational. The power suppply must be symmetrical.

Neon high voltage regulator (CB8804E)
Found in a1969’s neon lamp documentation, this circuit uses a high voltage transistor. The output...
'Push button memory (CB7243E)
This circuit was found in an American documentation from 1969. The circuit memorizes when a...
Precision rectifier with AC DC converter (CB9603E)
This circuit was found in an old American documentation. It can operate with signals from 40 Hz to...