Crystal oscillator has piezoelectric effect, that is, the crystal will deform after the voltage is applied to the two poles of the wafer, and conversely, if the wafer is deformed by external force, the metal plates on the two poles will generate voltage again. If an appropriate alternating voltage is applied to the wafer, the wafer will resonate (the resonant frequency is related to the inclination angle of Shi Ying slope, and the frequency is certain). The crystal oscillator uses a crystal that can convert electrical energy and mechanical energy into each other, and it can provide stable and accurate single-frequency oscillation when it works in the resonant state. Under normal working conditions, the absolute accuracy of ordinary crystal oscillator frequency can reach 50 parts per million. Using this characteristic, the crystal oscillator can provide a stable pulse, which is widely used in the clock circuit of microchip. Most of the wafers are made of Shi Ying semiconductor materials, and the shell is encapsulated with metal.Crystal oscillator has piezoelectric effect, that is, the crystal will deform after the voltage is applied to the two poles of the wafer, and conversely, if the wafer is deformed by external force, the metal plates on the two poles will generate voltage again. If an appropriate alternating voltage is applied to the wafer, the wafer will resonate (the resonant frequency is related to the inclination angle of Shi Ying slope, and the frequency is certain). The crystal oscillator uses a crystal that can convert electrical energy and mechanical energy into each other, and it can provide stable and accurate single-frequency oscillation when it works in the resonant state. Under normal working conditions, the absolute accuracy of ordinary crystal oscillator frequency can reach 50 parts per million. Using this characteristic, the crystal oscillator can provide a stable pulse, which is widely used in the clock circuit of microchip. Most of the wafers are made of Shi Ying semiconductor materials, and the shell is encapsulated with metal.