Zhejiang Pujiang Jingsheng Crystal Co.,Ltd.

Crystal Clock

Crystal oscillator refers to cutting a wafer (or wafer) from a quartz crystal at a certain azimuth Angle. The crystal element with IC is called crystal oscillator. Its products are usually encapsulated in metal, glass, ceramic or plastic. Crystal vibration: a general term for so-called crystal...

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Crystal oscillator refers to cutting a wafer (or wafer) from a quartz crystal at a certain azimuth Angle. The crystal element with IC is called crystal oscillator. Its products are usually encapsulated in metal, glass, ceramic or plastic.


Crystal vibration: a general term for so-called crystal resonator (crystal) and crystal clock vibrator (clock vibration). But because resonators are used more often in consumer electronics, the general idea is to equate crystal oscillations with resonators.


That is, generally speaking, the crystal resonator --> crystal oscillator -> crystal, crystal clock vibrator -> clock vibrator.


Quartz crystal oscillator is a high precision and high stability oscillator, which is widely used in various kinds of oscillation circuits such as color TV, computer and remote control, as well as in communication system for frequency generator, clock signal for data processing equipment and benchmark signal for specific systems.


Quartz crystal, both natural and man-made, is an important piezoelectric crystal material. Quartz crystal itself is not an oscillator, it can only produce oscillation by means of active excitation and passive reactance network. SPXO is mainly composed of high quality factor (Q) crystal resonator (i. e. crystal oscillator) and feedback oscillation circuit. Quartz crystal oscillator is an important element in oscillator. The frequency (base frequency or n harmonic frequency) of crystal and its temperature characteristic depend largely on its cutting orientation. The basic structure, package and equivalent circuit of quartz crystal resonator. As long as the alternating voltage is applied to the crystal oscillator plate, the chip will produce mechanical deformation vibration, which is called inverse piezoelectric effect. When the applied voltage frequency is equal to the natural frequency of the crystal resonator, piezoelectric resonance will occur, resulting in a sudden increase in the amplitude of mechanical deformation.


Application of quartz crystal oscillator: 

1. Quartz clock running time accuracy, energy saving, durability is its greatest advantage. Both the old quartz clock and the new quartz clock are based on the quartz crystal oscillator.


2. With the development of TV technology, the crystal oscillator of 500kHz or 503kHz is used as the oscillation source of the line and field circuits in recent color TV sets. The 15625Hz line frequency is obtained through 1/3 of the frequency division, and its stability and reliability are greatly improved. And the price of crystal vibration is cheap, easy to replace.


3. In the products of communication system, the value of quartz crystal oscillator has been more widely reflected, and it has also been rapidly developed. Many high performance quartz crystal oscillations are mainly used in communication networks, wireless data transmission, high-speed digital data transmission, etc.


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