This circuit can be used to test crystals from 1 to 20 MHz and also has an output to measure their frequency. We found it in the November 1998 Electronics Now magazine.
This circuit was found in an American documentation from the 90s. It consists of a variable with a...
The circuit shown in the figure generates a pulse train whose frequency is determined by the...
We found this circuit in a 1994 Linear Applications Handbook by National Semiconductor. The LM10...