7-segment display driver (CB20551E)

We found this circuit in English documentation from 1996 for PCs. The circuit is for common cathode display.

Amplifier with complementary transistors (CB7465E)
This stage of two complementary transistors was found in a 1977 Radio Handbook. Transistors admit current...
Precision Current Source (CB5139E)
This circuit is from a manual of linear integrated circuits of the 80s. The operational is of the...
Colpitts Oscillator IR15202S CB8083E (CB8083E)
Found in Popular Electronics from the 90s, this circuit reaches a few tens of megahertz. L1, C1...