This circuit found in an American documentation from 1964, alters the duration of a pulse and can operate at frequencies up to 10 MHz. The transistors are from that time.
The circuit presented is from the Linear Applications Handbook of the National Semiconductor of...
With this circuit it is possible to raise the characteristics of a transistor by checking its gain...
This circuit was found in a 1985 documentation. It consists of a microphone compressor that...