Self-biasing JFET circuit (CB25563E)

This JFET amplification stage was found in the April 1993 issue of Electronics Now. The input impedance is 10 Megohms.

Melody generator (CB9207E)
Found in an Elektor from the 90s, this circuit is based on components that are still common today....
Voltage converter for pulse duration (CB6095E)
This circuit was found in a Signetics documentation from the 1980s. Next to the figure are the...
UJT Mini timer (CB16454E)
This timer of 10, 25, 45 seconds and 5 minutes has its times selected by the keys. The circuit drives...