The role of capacitors

lustone

The role of capacitors [Copy link]

The functions of capacitors are: coupling, filtering, and bypassing. Can we understand it this way? Coupling is transmission, just like the function of connecting a small resistor; filtering is to use the charging and discharging of capacitors to improve the voltage ripple factor, that is, charging and discharging during the time t=rc; bypassing is to use the capacitive reactance of capacitors to divide the voltage under high frequency conditions, bypassing the signal of the frequency characteristic to the ground. I don't know if my understanding is correct, and I hope you can give me some advice.

兰博

I think so. But I still want to ask the experts on the board to explain. Learn from it!

独立团二营长

study

aaafdag

+1 for learning

qwqwqw2088

Filtering is used to filter out the AC component to make the output DC smoother. Generally, power supply rectification has more filter capacitors.

led2015

I think it is very difficult to choose capacitors when designing circuits. Sometimes I feel that the waveform is not right if it is just a little bit off.