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From the equivalent circuit of quartz crystal resonator, it can be known that it has two resonant frequencies, that is, when a, L, C and R branches occur in series resonance, its equivalent impedance is the minimum (equal to R).

With the rapid development of Smart electronic products in China, wireless Bluetooth headset, wearable smart visual watch and other common electronic products have gradually become the mainstream solutions of today's smart electronic products.

Quartz crystal oscillator, short for quartz crystal resonator, is the core product of quartz crystal components. It is a resonant device made by using the principle that the resonance phenomenon is caused by piezoelectric effect