Oscillators: Oscillators play a vital role in providing a reference frequency or clock signal for a variety of electronic devices, which not only ensures the synchronous operation of various components within the device, but also determines the rate and quality of data transmission. In the field of wireless communication, high-precision oscillators are indispensable in mobile phones, satellites and base stations, which ensure the accurate transmission and reception of data. In the field of precision measurement, atomic clocks use the natural oscillation frequency of cesium or hydrogen atoms to define the time standard with an accuracy of one second every 20 million years. In medical devices, such as electrocardiogram machines and ultrasound diagnostics, oscillators provide a stable reference frequency. In addition, in consumer electronic products such as computers and game consoles, oscillators serve as a source of clock signals to coordinate the working rhythm of various components. There are many kinds of oscillators, according to the different working principles and uses, can be divided into crystal oscillators, LC oscillators, RC oscillators and so on.