UNDERSTANDING QUARTZ CRYSTAL
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The usage and applications for quartz crystal devices is increasing with each new technological advancement in computers and peripherals, consumer electronics, telecommunications, and industrial
electro- nics. More and more engineers are now responsible for specifying crystal parame- ters for their specific application. Along with this new responsibility comes the need to better understand crystal devices. This Engineering Note will attempt to take away some of the mystery in trying to define certain parameters for crystals.
Quartz and Its Properties
The quartz crystal or resonator operates due to the piezoelectric effect. The piezoelectric effect of quartz allows it to produce an electrical charge on its surface when the same surface(s) are distorted or subjected to pressure. This distortion allows the crystal
to vibrate at a particular resonant frequency. Conversely, the application of an alternating voltage produces the same type of mechanical vibration.
Quartz is ideal for use as a frequency determining device because of its predictable thermal, mechanical, and electrical characteristics. The quartz crystal is one of the few devices that can
provide a high-Q (quality factor) that is needed for precise frequency control in oscillators used as a timing standard.
Natural quartz is rarely used as found in nature (especially in electrical applications), except as a gemstone. Natural quartz crystals have many chemical impurities and physical flaws. As a result, a commercial process of manufacturing pure, flawless, electronics-grade quartz was developed.
To learn more about hexagonal crystal quartz click here
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NATURAL CRYSTAL QUARTZ FROM OUR MINE
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