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What is a resonator and what is its function

:2022-08-12 :ICKU

Resonators[trade_no] are critical to the performance of oscillators[trade_no] and filters[trade_no]. Common resonator types include transmission line resonators, coaxial resonators, dielectric resonators, crystal resonators, ceramic resonators, surface acoustic wave (SAW) resonators, bulk acoustic wave (BAW) resonators, and yttrium iron garnet (YIG) resonators. Due to the frequency generated by the resonator, it has the characteristics of stability and good anti-interference performance, and is widely used in various electronic products. The frequency accuracy of quartz crystal resonator is higher than that of ceramic resonator, but the cost is also higher than that of ceramic resonator.


Resonators mainly play the role of frequency control. All electronic products need resonators for frequency transmission and reception. The types of resonators can be divided into Direct plug resonator[trade_no] and patch resonators[trade_no] according to their shapes.


Crystal resonator refers to the quartz crystal resonator made of quartz material, commonly known as crystal resonator It plays the role of generating frequency, has the characteristics of stability and good anti-interference performance, and is widely used in various electronic products


The ceramic resonator[trade_no] is an oscillation in a specific frequency to the electronic component. Typical applications include a microprocessor. For example, the clock signal in a digital circuit is a source [1]. In addition, it is usually used in timing circuits in many fields, such as television, video, electrical equipment, telephone, copier, camera, voice synthesizer, communication equipment, remote control and toys.



Similar to crystal oscillator, ceramic resonator is also an electronic circuit or device, which uses ceramics as resonant piezoelectric material to produce the output of oscillation frequency. This material can have two or more electrodes, which will generate mechanical vibration when connected to the oscillator circuit and thus generate an oscillation signal of a specific frequency. The circuit of the resonator is similar to that of the crystal oscillator. When the resonator works, the oscillation voltage is generated due to the mechanical vibration of the piezoelectric material (i.e. ceramics), and then the oscillation voltage is output.


Finally, as for the application of equipment, ceramic resonators are used in microprocessor applications with low frequency stability requirements, while crystal oscillators are more widely used, which can be seen in computers, children's toys with electronic components and other products. The resonator is suitable for Low-speed serial port communication, and the frequency of the crystal oscillator can be used to support high-speed serial communication.


The resonator has no frequency available for high-speed serial port communication. In terms of clock based applications, the resonator is not suitable for real-time clock / timing / wall clock. If variable capacitors are used for tuning, the oscillator may be suitable for timing /rtc/ wall clock. If it is not tuned, it is expected that there will be a few minutes of drift every year.