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Crystal oscillator applications and right frequency crystals

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Crystal oscillator applications and right frequency crystals

  • Nov 13, 2019

Crystal oscillators are widely used in: smart phones, tablets, Bluetooth, digital products, LED displays, communication equipment, security products, digital technology, automotive electronics, intelligent robots, medical equipment, drones and high-end aviation. and many more. It is also widely used in military and civilian communication stations, microwave communication equipment, program-controlled telephone exchanges, radio integrated testers, BP machines, mobile phone transmitters, high-end frequency counters, GPS, satellite communications, remote-controlled mobile devices, and so on. Crystals are used in 90% of electronic devices. It is the "small heart" in electronic products.


Applied to different product requirements are different. Crystal industry in recent years is also undergoing change as a variety of smart products turned out to be not only to meet the market demand for the electronics industry. The transition from the previous bulky thru-hole for today's ultra-small ultra-thin SMD crystal, precision getting smaller and smaller, so that the product becomes more stable.


computer:

Computer which used a 49S SMD crystal. When the computer starts we will need to transfer command frequency crystals from the initial start-up operation. Which also use the computer to a cylinder 32.768KHZ crystal, it is the role of the time display.


camera:

The camera uses a SMD crystal 32.768K and a patch crystal 5032 of 12M. The crystal oscillator is required to transmit this command to turn it on. We need a crystal oscillator to transmit this signal to make it work properly.

Smart home:

Including air conditioners, lights, curtains, security, surveillance, etc., all require wireless transmission modules. They send modules from one end to the other through Bluetooth, WIFI or ZIGBEE protocols, or through mobile phones.


In general, intelligent hardware products require data transmission, and wireless transmission modules are indispensable. Crystal oscillators are very core components in wireless modules. The crystal oscillators are placed in the module and applied to the actual product, and these products are intelligent. At present, the crystal oscillator products are continuously developed in the direction of intelligent hardware, and are developing in the direction of patching and small size.


Ordinary general household appliances: With a module, it becomes a smart home, and it becomes intelligent through mobile phone or APP management. For example, a 2.4G module, plus a crystal oscillator, can be made by adding a software team. Today, crystal oscillators continue to evolve from large to small sizes, matching smart hardware products. With the widespread popularity of smart hardware, the crystal oscillator industry will usher in a larger market development space and more development prospects.


Internet of Things[IoT crystals]:

The Internet of Things is a complex application technology. It covers a wide range. It covers not only microwave technology and electromagnetic theory, but also the principle of infinite communication and semiconductor integrated circuit technology. It is a multidisciplinary fusion.  Emerging application technologies.  In the application of wireless communication principle, there is a crystal oscillator which is more important, that is, the 3225 size 24Mhz quartz crystal resonator, its main function is to send and receive frequency signals.  Therefore, it is the first big opportunity for quartz crystal. With the development of the Internet of Things, quartz crystal has become a popular product.



White goods:


The white goods commonly used in the home are nothing more than rice cookers, induction cookers, juicers and microwave ovens, etc., all without heating.


When these home appliances are controlled by a single-chip MCU, we must add a crystal oscillator (piezo quartz crystal or piezoelectric ceramic crystal) to the line. Provide a stable frequency in the calculation of the single-chip microcomputer, and then implement each according to the instructions of the single-chip microcomputer.  The function corresponding to the button .


In the general consumer electronics application of the single-chip microcomputer, when the accuracy of the crystal oscillator is not strict, the piezoelectric ceramic crystal oscillator such as: ZTA4.0MG, 4.000MHz is converted to a frequency difference of 12KHz according to the accuracy of the thousandth ratio. The general single chip can be  Working normally.


LED display:

The LED display needs to be applied to a 32.768KHz cylindrical crystal and a quartz SMD crystal.  32.768KHz is mainly used here as a display. 32.768KHz is also a kind of crystal, and this frequency is also called "watch crystal or tuning fork crystal " mainly to show the effect of time.  Usually applied to all products related to the time system.  The patch crystal is mainly used to provide a stable frequency for the product.  Therefore, the LED is also inseparable from the support of the crystal oscillator.


Automotive Electronics:

The crystal oscillator for automotive use has changed from the patch type product 8045-5032-3225 and miniaturization.  This is because the overall packaging of crystal products is changing in the direction of miniaturization.  In addition to the special high-temperature operation of the car (+-150 °C), the requirements for improving weld crack resistance and the like are also improved.  In particular, in order to improve the processing performance of the ECU, the operating frequency tends to be high frequency, and the need to meet small words will be more intense.  In automotive electronic components:



1, a wide range of operating temperatures (-40 ~ +-125 ° C, depending on the occasion can also reach +-150 ° C);

2. High reliability represented by AEC-Q200;

3, high quality requirements such as zero defects;

Security:

49SMD and 49S are currently very mature, domestically produced stable crystals, in the rise of security products, the demand continues to increase:



1. The main frequencies used in security are: 13.560MHz, 24.000MHz, 12.270MHz, 17.7344MHz, 18.9375MHz, 28.375MHz, 37.875MHz, 38.13986MHz 

2, the frequency walkie-talkie mainly used for: 21.400MHz, 21.7000MHz. At the same time, it is also applied to access control systems, videophones/intercom gates, community intelligent control systems , etc.


A-Crystal electronic technology Co.,Ltd

https://www.acrystals.com/

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