This circuit was found in an old documentation, being able to generate signals of frequencies in the range of 50 to 100 MHz. The components are of the time.
The circuit that gave rise to this configuration is from 1978. In the original publication are...
Found ina 1970 American documentation this fast-reading circuit uses a photodiode. Transistors...
Found in an 1868 Mullard documentation this circuit has a dynamic range of 10 Hz to 25,000 Hz....