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What is a crystal oscillator?


When you see the crystal oscillator, do you ever thought what type of crystal is it? And what exactly is the crystal oscillator?

Let’s start with oscillator first. Oscillator is a devices that can converse energy which converse direct current energy to specific frequency alternating current energy. It can produce repeat electrical signal.


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In crystal oscillator, the crystal it use is quartz. Quartz is hard, wear resistant and have a stable chemical properties. The crystal oscillator can produce a highly stable signal, which is good for some electronic devices that need stable AC signal. Other oscillator, like LC oscillator which have a bad stability and will shift to other signal. Therefore, use crystal oscillator is a better option for those devices.


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The method of making a crystal oscillator is to cut a thin layer quartz and polish it, then coat it with a conductive silver. Finally, connect two electric pole with the silver coat and pack it up, a crystal oscillator is finish.

The crystal oscillator is mainly use in the colour TV, computer main main board, electric stove and so on.

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