This circuit is suitable for calibrating old oscilloscopes. It was found in a 1980s documentation. It generates precise signals given by the crystal.
With this circuit it is possible to divide the frequency of a rectangular signal by values between 2...
We found this circuit in a Popular Electronics from 1992. The circuit shows how to use a variac in a...
The purpose of this circuit is to restore the 0 V black level of an analog TV video signal at the...