Three-input majority gate (CB7248E)

This interesting logic circuit was found in a manual of neon lamp applications.

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Astable Multivibrator (MSB016E)
This is the traditional configuration of na Astable Multivibrator using two NPN ttransistor....
RIAA Preamplifier III (CB958E)
This circuit was adapted from an Italian publication that no longer exists. This is “Onda Quadra”...
Source follower (CB6965E)
This FET stage circuit was obtained from old American documentation but can be applied to any FET....