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Pierce XTAL Oscillator Using JFET (AT24C02BN)

2016-08-06 14:46  
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This article describes the Pierce XTAL Oscillator Using JFET (AT24C02BN). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:AT24C02BN.

This circuit is conventional “Pierce” type oscillator that uses a JFET. The circuit uses fundamental mode crystals. It has decent performance and reliability if we use a low noise JFET.

pierce xtal oscillator jfet circuit schematic

The feedback is controlled by the C1 Capacitance from drain to ground. Adjusting the frequency can be done by adjusting a shunt capacitance C2 across the crystal. The crystal works in parallel mode. This circuit is suitable where some crystals should be switched in and out to select the frequency, as there’s no tuning required.

 


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