Square sawtooth converter (CB8926E)

We found this circuit in a 1967 American documentation. The diodes are general-purpose and the input frequency can be between 80 and 800 Hz.

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Infrared alarm (CB7238E)
Found in 1968 Mullard documentation, this circuit uses period components. The transistors are...
Voltage Multiplier (CB20184E)
In the figure we have a modified multiplier circuit that can operate with the sextuplicator with...
Low frequency converter (CB9336E)
This circuit converts signals from the 350 to 500 kHz band to the 4.36 to 4.5 MHz band, enabling...