Low-Frequency Crystal Controlled Oscillator
The RF engineer sometimes has to look for an instrument that will check a low frequency quartz crystal unit reliably and rapidly. This is a difficult piece of equipment to find and the engineer often has to consult an electronic circuits handbook for the schematic of a circuit that will perform the task.
Unfortunately, there aren’t many such circuits in the technical literature currently available, and when found, they don’t always work as expected. A circuit that has been found to work at full satisfaction in the frequency range from 10 kHz to 500 kHz is illustrated in Figure 1.
Read More Source:Ramón Vargas Patrón
http://www.mitedu.freeserve.co.uk/Circuits/rf/cco.htm
