1. What is a ceramic oscillator
It is a frequency component of piezoelectric ceramics. Ceramic oscillator is another name: ceramic oscillator, ceramic crystal oscillator, ceramic resonator, etc. It is a kind of frequency components of piezoelectric ceramics. The main function is to convert the electrical energy in the circuit into mechanical energy to generate a predetermined stable frequency. Although the accuracy of ceramic oscillators is expressed as "thousandths", which is far lower than the PPM "parts per million" of quartz crystal oscillators, the high cost performance brought by the frequency stability and low voltage of ceramic crystal oscillators is a must for every electronic engineer Obsessed.
2. The working principle of ceramic oscillator
Ceramic crystal oscillator, which is similar to quartz crystal oscillator, can convert electrical energy into mechanical energy, as well as mechanical energy into electrical energy. When the frequency of the applied AC electric field resonates with the resonant frequency of the resonator, the conversion of electrical energy and mechanical energy will occur at the resonant frequency of the resonator, which has the outstanding feature of being very sensitive to the frequency of the excitation signal, because it needs to be matched with various ICs Application, so the starting oscillation and resonance of the resonator are designed according to different IC matching.
3. The role of ceramic oscillators
Ceramic resonators are important components in oscillators. The frequency (fundamental frequency or nth harmonic frequency) of the crystal and its temperature characteristics depend to a large extent on its cutting orientation. The basic structure, (metal shell) package and equivalent circuit of ceramic resonator. As long as an alternating voltage is applied to the plate of the crystal oscillator, the wafer will be mechanically deformed and vibrated. This phenomenon is the so-called inverse piezoelectric effect. When the frequency of the applied voltage is equal to the natural frequency of the crystal resonator, piezoelectric resonance occurs, resulting in a sudden increase in the amplitude of mechanical deformation. When the frequency of the applied AC electric field and the resonant frequency of the resonator resonate, the conversion of electrical energy and mechanical energy will occur at the resonant frequency of the resonator. Features such as adjustment, small size and low cost.
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