How to Gradually Determine The Parameters and Type When Choosing A Quartz Crystal Oscillator

2024-03-01 YXC News
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Crystal oscillators are used in more and more communication equipment. With the development of technology, the types of quartz crystal oscillators are also increasing. Therefore, many users are paying attention to how to choose the parameters and type of crystal oscillators. Yangxing will talk to you about three directions to determine your crystal oscillator type.

The system type and oscillator determine the output frequency
When purchasing a quartz crystal oscillator, you must first consider the output frequency. When selecting a crystal oscillator, it should be determined by the system type and oscillator. The parameters of the crystal oscillator cannot be ignored. The oscillator itself is a device that generates AC output after entering the voltage. Therefore, when selecting, we must look at the system type and oscillator to determine the parameters of the crystal oscillator we need. Usually common equipment frequency parameters are between 10MHZ and 100MHZ. It is also necessary to determine whether a low-frequency crystal is used. When determining the crystal oscillator parameters, we must consider the specific application requirements and check the parameter markings on the crystal oscillator package to ensure that the purchased crystal oscillator parameters meet our requirements.

The center frequency determines the stability of quartz crystal oscillator
For quartz crystal oscillators, stability cannot be ignored when selecting. In this regard, it is important to understand that the frequency change value divided by the center frequency represents its stability. First determine the frequency of the crystal oscillator according to our usage requirements, and then understand the temperature changes after determining the frequency. For example, the frequency of the oscillator we need is 10MHZ, and at the same time, the temperature changes by about 10HZ. In this case, according to the stability just mentioned, it is equal to the frequency change value divided by the center frequency. It can be concluded that the temperature stability value is 1ppm , when determining the stability of quartz crystal oscillators, comparison must be made within the temperature range.

Select crystal oscillator type according to actual application requirements
After determining the parameters of the quartz crystal oscillator, it is natural to pay attention to the type and the specific application requirements. When choosing a crystal oscillator, there are different types from ordinary crystal oscillators to temperature compensated crystal oscillators, constant temperature controlled crystal oscillators and voltage controlled crystal oscillators according to their own characteristics, and there are also differences between passive crystal oscillators and active crystal oscillators. Passive quartz crystal oscillators are mainly composed of crystals and pins and require additional capacitor circuits. Active quartz crystal oscillators themselves have the ability to oscillate. Therefore, the type of quartz crystal oscillator should be selected according to actual needs. Usually, when determining the type of quartz crystal oscillator, its specific connection method must also be considered, and the supplier should also be consulted in this regard.


When choosing a quartz crystal oscillator, you must do your homework in advance, and then choose the appropriate parameters and types according to your needs. You must not ignore the connection method of the crystal oscillator. In this regard, you can confirm the actual application requirements with the supplier about the specific connection method of the crystal oscillator. At the same time, you must also Understand the quartz crystal oscillator packaging situation and ensure that the parameter configuration on the package meets our purchasing needs.

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