Stereo preamplifier TDA3410 (CB21937E)

Taken from the 1982 SGS manual on integrated circuits, this preamplifier was used in commercial equipment at the time.

Battery Charge Indicator (CB26002E)
This circuit was found in the March 1997 Electronics Now magazine. It uses a common analog...
Comparator with AND gate (CB9407E)
This tunnel diode circuit was found in American documentation from 1966. The tunnel diode is the...
Monostable with Input Lock LM339 (CB19794E)
This circuit was found in the comparator's own documentation, serving others in the same series. The...