Tunnel diode simple noise generator (CB23705E)

This circuit was found in Radio Electronics magazine from November 1960. The circuit is powered by a photocell of the time.

Trigger (CB9253E)
This circuit was found in an American documentation from 1969. It serves to trigger circuits by...
Wien Bridge Oscillator (CB14117E)
The configuration presented below was obtained in the Linear Application Handbook of the National...
Cable Termination Circuit (CB21077E)
Found in an Electronic Design from the 90s, this circuit uses components from the time. It is...