Analog filters can be divided into active filters and passive filters.
模拟滤波器可分为有源滤波器和无源滤波器。
In view of harmonic which generated from the new-type HVDC analog system 12-pulse wave rectifiers and the inverter, designed passive filters system based on the new-type converter transformer.
针对新型高压直流输电模拟系统12脉波整流器与逆变器产生的谐波，设计了基于新型换流变压器的无源滤波器系统。
In analog control system, passive and active electrical networks are usually applied to realize these very important forms of compensation.
在类似的控制系统中，无源和有源电网络通常被用来分析补偿的重要形式。
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