This circuit was described in an article in the February 1993 Radio Electronics magazine. The frequency depends on the crystal and L1 is optional.
This circuit was found in a 1999 documentation, but the components it uses can still be easily...
In the figure we have an application for NLAS5113, a new device from on Semiconductor...
The use of field effect transistors in this circuit improves its performance. This configuration is from a...