简单地讲就是需能（电）源的器件叫有源器件，无需能（电）源的器件就是无源器件。有源器件一般用来信号放大、变换等，无源器件用来进行信号传输，或者通过方向性进行“信号放大”。 RLC都是无源器件，IC、模块等都是有源器件。-Simply put, is the need to be able (power) source device called active devices without energy (power) source device is passive devices. Active devices are generally used for signal amplification, transform, passive devices used for signal transmission, or by directivity "signal amplification." RLC are passive devices, IC, module, etc. are active devices.