电容器

电容器是一种无源两端电气元件，通过电场储存电能。在滤波网络中，它用于平滑电压波动、滤除噪声，并根据电路需求通过充放电来稳定电源。它由两个被介电材料隔开的导电板组成，电容以法拉（F）为单位测量。

电容器的工作原理是：当施加电压时，电荷在其极板上积累，从而在介电材料上产生电场。在滤波网络中，电容器与电感器或电阻器配合，阻止直流（DC）通过，同时允许交流（AC）通过，从而滤除特定频率，以减少电源或信号线路中的纹波和噪声。

Capacitors operate by accumulating electric charge on their plates when a voltage is applied, creating an electric field across the dielectric. In filter networks, they work with inductors or resistors to block direct current (DC) while allowing alternating current (AC) to pass, filtering specific frequencies to reduce ripple and noise in power supplies or signal lines.