The performance and usage of electrolytic capacitors, surface mount capacitors, tantalum capacitors, and oscillating capacitors respectively 2

The role of electrolytic capacitors in circuitsdiode

1. Filtering function: In the power circuit, the rectifier circuit converts AC into pulsating DC, and after the rectifier circuit, a larger capacity electrolytic capacitor is connected to utilize its charging and discharging characteristics to make the rectified pulsating DC voltage become a relatively stable DC voltage. In practice, in order to prevent changes in the supply voltage of various parts of the circuit due to load variations, electrolytic capacitors with a capacity of tens to hundreds of microfarads are generally connected at the output end of the power supply and the input end of the load. Due to the fact that large capacity electrolytic capacitors generally have a certain inductance, they cannot effectively filter out high-frequency and pulse interference signals. Therefore, a capacitor with a capacity of 0.001-0.1pF is connected in parallel at both ends to filter out high-frequency and pulse interference  diode