Aiming at actual instance that the frequency of electric network is waving, based on twin-T resistance-capacitance active-trap filter, a trap filter which can filter the power interference between 49.
针对电网频率波动的实际情况,基于双t型阻容有源陷波电路,设计了可以滤除频带在49。
The wien bridge trap filter and its application in the distortion measurement are introduced, the kind of intelligent numerical control tuning wien bridge trap filter circuit is proposed.