Geiger counter with high voltage source (CB22333E)

This circuit includes a high voltage inverter to power a Geiger tube. We found it in an American documentation from the 60s.

Meter ICL7117 For Bridge (CB15359E)
This circuit is from the 1983 Intersil Databook. The circuit has an A / D converter for display of 4 and...
3 to 5 V x 150 mA converter LT1106 (CB14609E)
We found this circuit in Linear Technology Applications of 1997. The circuit uses common...
Linear VCO (CB9429E)
Found in a 90's EDN, this circuit generates signals in the frequency range given by the graph. The...