What You Should Know About Crystal Oscillators You have to understand that the crystal oscillator is a type of electronic oscillator which uses crystal as a frequency selective element to have inverse piezoelectric effect. This would use mechanical tone of vibrating crystal that comes with piezoelectric properties to have an electric signal which comes with high-precision frequency. You must know that those crystal oscillators are known to be superior to the ceramic resonators because they have higher stability, quality, lower cost as well as they are smaller in size. Know that in the crystal oscillators, the electrical resonant circuit is actually replaced with mechanically vibrating crystal. The crystal comes with high degree of stability in order to hold constant at any frequency the crystal is cut in order to operate. The crystal oscillators are utilized when great stability is required for example in the communication transmitters, the receivers, the digital clocks and several others. Quartz crystal would exhibit such very important property which is known as piezo-electric effect. When there is mechanical pressure applied across the faces of the crystal, a voltage is proportional to the applied mechanical pressure which appears across the crystal. If the voltage is applied to the surfaces of the crystal, then the crystal becomes distorted with the amount that is proportional to the applied voltage. The alternating voltage being applied to the crystal would cause it to vibrate at a natural frequency. Aside from the quartz, other substances which show the piezo-electric effect include tourmaline and Rochelle salt.
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Crystal oscillators are the main example of the fixed-frequency oscillators wherein the accuracy and the stability are really major considerations. They often use the same circuits like the other kinds of oscillators with the difference in which the crystal replaces the tuned circuit. With the crystal oscillators, the crystal is going to vibrate when the resonator and its resulting frequency is what determines the frequency of such oscillation. This means that the crystals are going to act the same with the circuit that comes with inductor, resistor and capacitor that has accurate resonant frequency. To have much better thermal stability for the crystal oscillator, there is a temperature compensation being applied.
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Know that there are a lot of advantages when crystal oscillators are used in the digital applications. Crystals can be manufactured to have a great range of specific frequencies. Unlike the tuned circuits, the crystals possess a high Q-factor, a better temperature stability as well as better frequency stability as compared to the RC oscillators or the LC oscillators. The crystals which are used in the crystal oscillators just exhibit very low phrase noise. These are utilized primarily in the digital integrated circuits because of having a stable clock signal as well as certain applications which require high-frequency reference.

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