Simple 5V regulator (CB8815E)

This simple 5.6 V regulator circuit was found in a 1966’s Philips. The zener can be changed to obtain other voltages.

Inverter Electronic Switch (CB17099E)
We found this circuit in a 1997 documentation. Its purpose is to fan an inverter for fluorescent lamp...
DC DC Converter from 12 V to 33 V (CB1231E)
We find this circuit in a 1994 technical documentation. The circuit has a 12 V input and a 33 V...
Center Tap Simulation with Diodes (CB4140E)
In the figure we show how two diodes can be used to simulate the center tap of a push-pull driver step....