A capacitor three-point type (also known as a Pierce oscillator) is a circuit that uses the charge and discharge process of a capacitor to generate a stable high-frequency signal. The basic principle is that the capacitor generates high-frequency oscillations through continuous charging and discharging, and then produces an output signal.
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Specifically, the capacitor three-point form consists of a feedback loop and a transistor. When the transistor is on, the capacitor begins to charge, until it is full and reaches a certain voltage threshold, the transistor is turned off, and the capacitor begins to discharge again. This process is repeated over and over again, and under the action of the feedback loop, the entire circuit produces stable, continuous high-frequency oscillations.
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The output frequency and waveform form can be controlled by selecting appropriate feedback network design and appropriate component parameters. Therefore, the capacitor three-point type is widely used in radio frequency (RF) and microwave fields in wireless communication, radar, satellite communication and other systems.