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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Speed control for PM motor (CB7295E)
This circuit was found in Motorola documentation from the 80's. The MOSFET admits equivalent...
Low Voltage Oscillator (CB6188E)
This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old...
50 kHz to 10 MHz Oscillator (CB25682E)
The frequency of this oscillator depends on the crystal used. The transistors are general purpose. We...