3 V buffer (CB7142E)

This 3 V rail to rail buffer was found in a National Semiconductor documentation. The gain is unit.

Bridge type transistor tester (CB20526E)
We found this circuit in documentation from the 1950s. The circuit basically applies to germanium...
1 A symmetrical power supply (CB25954E)
The circuit shown, with the printed circuit board, was found in an article in the June 1990 issue...
Divider by 5 4 or 3 (CB6899E)
We found this circuit in documentation from Ferranti from 1968. The circuit uses transistors from that...