低频时码授时电能表抗干扰滤波器设计

Design of Anti-jamming Filter for Low Frequency Time Code Time Meter

为了解决电能表低频时码授时技术存在的干扰问题,对低频时码的干扰源进行研究,针对低频时码接收的干扰这一问题,利用无限增益多路反馈带通滤波器原理,设计了一款滤波器,滤出68.5 k Hz以外的干扰信号,并用Multisim软件进行仿真,可以使信号混杂的干扰得到很好的抑制,低噪声,失真较小。

In order to solve the interference problem of low frequency time code technology, the interference source of low frequency time code is studied. In view of the interference problem of low frequency time code reception, based on the principle of infinite gain multiple feedback bandpass filter, a filter is designed. It can filter out interference signals other than 68.5 kHz, and use Multisim software for simulation, the signal mixed interference can be well sup- pressed with low noise and less distortion.