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Simple crystal oscillator

Simple crystal oscillator
Here is a very easy and inexpensive way of building a crystal oscillator from a Single lC. Only two of the inverters contained in the IC are used. The design is reminiscent of a traditional rectangular-wave generator in which a crystal and two resistors replace the RC network. The oscilator frequency may be made variable by replacing the crystal with a trimmer of 22-68 pF.
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