This circuit is one of many that the reader can find in this section for testing crystals. The circuit uses an indicator LED. Transistor Q1 determines the maximum crystal frequency that can be tested.
July 2017 - Mouser Electronics announced the availability of the new NXP MRFX1K80 RF LDMOS...
Other CMOS gates can be used in this sensor, which we found in the July 1995 Electronic Now...
This circuit is from a 1978 publication, and the integrated diode bridge can be replaced by...