Found in an American documentation from the 90s, this circuit has a configuration that has been extensively explored in other articles on this site. The FET can be the MPF102 or equivalent.
This simple low-power circuit uses, in the original version of 1965, germanium transistors. The...
This circuit was found in a 1989 publication. The operational amplifier supports equivalents. The...
This circuit from a 1967 publication turns a short pulse into a square signal whose duration...