This is the design circuit for a Colpitts-crystal oscillator circuit. It is suitable for low frequency crystal oscillator circuits. Using the 2N3823 JFET, this circuit has excellent stability because the temperature will not vary the 2N3823 JFET circuit loading. This is the figure of the circuit.
This is a simple form circuit for the oscillator. [Circuit Schematic Source: National Semiconductor Application Note]
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