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 49.5Hz and 50.5Hz is designed.

• 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.；5~50