Phase detector (CB8155E)

This circuit was found in a 1967 Electronic Design. The FET is from that time. Capacitor C is determined by the frequency of the signal worked.

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Neon oscillator with several outputs (CB9249E)
Found in a 1969 documentation, this circuit consists of a multi-oscillator with neon lamps....
Car Radio Switched Regulator (CB15133E)
This high-performance circuit was found in the 1982 SGS Linear Integrated Circuits Manual. The...
Null Adjustment (CB19722E)
We have in the diagram another way to make the null adjustment of an operational amplifier. In...