Found in old documentation, this circuit makes use of amplifiers of the time, uncommon today. Next to the diagram, the formula for calculating the components.
This circuit can generate signals from 100 kHz to 50 MHz depending on the crystal and the...
The circuit in the figure represents a typical application of a phototransistor exciting a relay...
Found in Philips documentation from 1968 this circuit operates at frequencies up to 10 MHz with 76...