The purpose of this 1967 Philips circuit is to produce a rectangular signal from a sharp pulse. The circuit makes use of an unusual component today as a base.
With the use of a cascade transistor, the dynamic response of a phototransistor can be increased, as...
In the figure we have an oscillator with a single transistor that can generate signals in the...
This source was found in Philips' 60s documentation. The transistors are from the era and the...