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电容在暂态、稳态具有不同的特性,稳态时,电容具有交流滤波(其滤波性能与信号频率及电容容量成正比)、直流隔断的作用;暂态时,由于其具有微分特性,从加电开始,电容具有充电的功能,从掉电开始,电容具有放电功能,并且电容上的电压不能突变。电容的稳态特性广泛应用于直流电源的滤波、交流信号的隔直等;电容的暂态特性广泛应用于微积分电路、波形产生电路、复位电路、开关电源的启动电路等。正是电容
Capacitance has different characteristics in transient and steady state. In steady state, the capacitor has the function of AC filter (its filtering performance is proportional to the signal frequency and capacitance) and the DC cutoff. Due to its differential characteristic, When the power is on, the capacitor has the function of charging. From the power-down, the capacitor has a discharging function, and the voltage on the capacitor can not be abruptly changed. The steady-state characteristics of capacitors are widely used in DC power supply filtering, AC signal isolation, etc .; transient characteristics of capacitors are widely used in calculus circuit, waveform generation circuit, reset circuit, switching power supply startup circuit. It is capacitance