What is the function of capacitors?
Visit：5940 Date：2024-01-06
In a DC circuit, the capacitor is equivalent to an open circuit. A capacitor is a component that can store electric charge and is one of the most commonly used electronic components. This has to start with the structure of the capacitor. A simpler capacitor is made up of plates at both ends and an insulating dielectric in between. After energization, the plates are charged to form a voltage, but due to the intermediate insulating material, the entire capacitor is not electrically conductive. Any substance is relatively insulated. When the voltage at both ends of the substance is increased to a certain extent, the substance can be electrically conductive. We call this voltage the breakdown voltage. Capacitance is no exception. After the capacitor is broken down, it is not an insulator. The process of charging and discharging the capacitor is time-consuming. At this time, a changing electric field is formed between the plates, and this electric field is also a function of time. In fact, the current is passed between the capacitors in the form of an electric field. The capacitor in the frequency dividing circuit is called the frequency dividing capacitor. In the speaker frequency dividing circuit of the speaker, the frequency dividing capacitor circuit is used to make the high frequency speaker work in the high frequency band, the intermediate frequency speaker works in the middle frequency band, and the low frequency speaker works in the low frequency band. Frequency band. Load capacitance: refers to the effective external capacitance that determines the resonant frequency of the load together with the quartz crystal resonator. Standard values commonly used for load capacitors are 16pF, 20pF, 30pF, 50pF, and 100pF. The load capacitance can be adjusted according to the specific situation. The adjustment can generally adjust the operating frequency of the resonator to the nominal value.
