The Different Things You Must Know About the Crystal Oscillator It is important for you to know that the crystal oscillator is one kind of electronic oscillator that utilizes crystal as a frequency selective element to get an inverse piezoelectric effect. This uses the mechanical resonance of those vibrating crystal that has piezoelectric characteristics to get an electric signal that 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. In the crystal oscillators, the usual electrical resonant circuit is being replaced by a mechanically vibrating crystal. The crystal has high degree of stability to be able to hold constant at any frequency that the crystal is cut in order to work. Therefore, the crystal oscillators are used whenever great stability is required for instance in the communication transmitters, the receivers, the digital clocks and others. The quartz crystal would exhibit a really important property that is called piezo-electric effect. If there is mechanical pressure applied across the faces of the crystal, there is a voltage that is proportional to the applied mechanical pressure that 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 changing voltage applied to the crystal results 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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The crystal oscillators are the primary example of those fixed-frequency oscillators in which the accuracy and the stability are quite important considerations. They are going to use the same circuits in which the other kinds of oscillators with such difference wherein the crystal would replace the tuned circuit. In crystal oscillators, a crystal would vibrate when the resonator and also the resulting frequency would determine the oscillation’s frequency. 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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You must know that there are so many benefits when crystal oscillators are being used in the digital applications. Crystals can be manufactured to have a great range of specific frequencies. Unlike those tuned circuits, the crystal have a high Q-factors, better temperature stability, better frequency stability as compared to the RC and the LC oscillators. Crystals being used in the crystal oscillators exhibit really low phrase noise. These are being used mainly in the digital integrated circuits for having a stable clock signal and also certain applications needing high-frequency reference.

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