GPS navigation is not accurate, quartz crystal oscillator has the final say!

With the rapid development of information technology, GPS system is one of the most widely used and practical scientific and technological products in the world. GPS system can give full play to its positioning accuracy, which is inseparable from the quartz crystal oscillator with high precision and high stability. Therefore, the quartz crystal oscillator is responsible for the accuracy of GPS navigation and positioning!
Quartz crystal oscillator has important application value in radio system and other application fields because of its high frequency reference, high stability and irreplaceable. Among them, our most commonly used vehicle GPS radar is 38.88 MHz crystal oscillator.
As we all know, GPS positioning system is a global, all-weather satellite radio navigation system. It can provide high-precision three-dimensional position, three-dimensional velocity and accurate time information for unlimited users continuously and in real time. Because GPS positioning technology has the obvious advantages of high precision, high speed and low cost, it is the most widely used and practical navigation and positioning technology in the world.
In terms of modern technology, the most widely used technology should be clock technology. Nowadays, many scientific and technological fields have higher and higher requirements for time accuracy, such as military, aviation and communication systems. These fields require high-precision synchronous clock as the benchmark to ensure the normal operation of the whole operating system.
GPS positioning, ranging and navigation can be said to be inseparable from clock technology. High precision frequency standards mainly include hydrogen clock, rubidium clock and cesium clock. For example, atomic clock and high-precision crystal oscillator are preferred, while quartz crystal oscillator has longer service life and more favorable price. Therefore, it has been widely used. However, due to factors such as temperature and aging products of quartz crystal oscillator, frequency drift will occur, Therefore, the stability performance will deteriorate for a long time.
Therefore, designers need to calibrate the crystal vibration frequency automatically through the real-time control of the voltage control voltage, complement the crystal vibration clock signal between the clock signal and the temperature of the whole machine, change its output frequency by adjusting the voltage control constant temperature crystal, and maintain the time accuracy and accuracy in a short or long term.
Quartz crystal oscillator has been widely used in satellite communication, radar navigation, measurement and control, television broadcasting and other systems, especially put forward higher requirements for the frequency and stability of electronic instruments.

Commax-Tech Electronic Co., Ltd      Electronic component specialist

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