Symmetrical Inverter (CB6647E)

This circuit reverses the signal if both positive and negative. We found it in an American documentation from 1969.

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Perforated tape reader (CB7417E)
Found in General Electric documentation from the 1980s, this high speed perforated tape reader...
Low voltage indicator (CB9550E)
This circuit indicates when the voltage of a 12 V battery is low. With changes, for example, the...
Digitally Controlled Sine Wave Generator (CB24568E)
We found this signal generator circuit in the November 1978 issue of Radio Electronics magazine. The...