Re: Basic use of crystal in microcontroller
- From: John Popelish <jpopelish@xxxxxxxx>
- Date: Tue, 21 Feb 2006 11:43:10 -0500
joshua wrote:
I want to know about crystal and why we use in electrnoic circuit.
what is the basic function/use of crystal
A crystal is a very narrow band filter element based on the vibrational resonance of a slice of quartz and the fact that applying voltage to the slice causes it to change shape, and changing the shape by mechanical force generates voltage.
They are normally used as the frequency determining element in oscillator circuits, by connecting them in a signal loop, in series with a gain block. This combination generates an endless echo with a duration equal to the period of the quartz resonance. The stability of quartz oscillators is measured in parts per million, whereas the stability of oscillators based on RC time constants or inductor capacitor resonances is measured in percent.
Here is a Google hint. If you want to learn how something works (and not see a lot of sales adds) add the word tutorial to any subject search.
For instance, try putting these key words into the Google search box:
[quartz crystal oscillator tutorial]
.
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