The principle that capacitor can pass high frequency and resist low frequency.

The capacitor has DC blocking effect, which means that no current flows in the circuit after the DC current charges the capacitor. When the DC power supply is just added to the capacitor, a current flows in the circuit, which is the charging current of the capacitor.

This process of current flow will soon end, and the specific time is related to the size of resistance and capacitance in the circuit. The greater the product of the two dimensions, the longer and shorter the charging time. After the charging is completed, the voltage across the capacitor is equal to the DC supply voltage.

Extended data:

Self-healing shunt capacitor

The structure is similar to that of paper capacitor, but low-loss plastic materials such as polyester and polystyrene are used as dielectrics. Features are as follows:

1, good frequency characteristics and low dielectric loss. ?

2, it cannot be made into a large capacity, and its heat resistance is poor.

3. Filtering, integrating, oscillating and timing circuits. Ceramic dielectric capacitor One electrode of a ceramic dielectric capacitor with a through-hole or columnar structure is a mounting screw. Lead inductance is very small, frequency characteristics are good, dielectric loss is small, and it has temperature compensation function.

4, can not be made into a large capacity, vibration will cause capacity changes. ?

5, especially suitable for high frequency bypass. ?

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