巴特沃斯低通宝马娱乐网址滤波器计较器

 产品系列     |      2021-11-02 05:59

巴特沃斯低通滤波器计较器 | LC低通滤波器计较器 | Pi型滤波器参数计较

巴特沃斯滤波器是电子滤波器的一种,它的特点是通频带内的频率响应曲线最大限度平坦,宝马娱乐 ,没有起伏,而在阻频带则逐渐下降为零。在振幅的对数对角频率的波特图上,从某一界线角频率开始,振幅跟着角频率的增加而慢慢淘汰,趋向负无穷大。

而低通滤波器有许多种,最通用的就是 巴特沃斯滤波器 和 切比雪夫滤波器 。

巴特沃斯低通宝马娱乐网址滤波器谋略器

The Butterworth type filter was first described by the British engineer Stephen Butterworth.

A PI filter is a filter that has a series element and two parallel elements connected in the shape of the Greek letter PI.

Butterworth filter are characterized by a constant gain (flat response) across the midband of the circuit and a 20 dB per decade roll-off rate for each pole contained in the circuit.

Butterworth filters are termed maximally flat magnitude response filters, optimized for gain flatness in the pass band. The attenuation is -3db at cutoff frequency. Above the cutoff frequency the attenuation is -20 db.

The Butterworth is the only filter that maintains same shape for higher orders whereas other varieties of filters (Bessel, Chebyshev, elliptic) have different shapes at higher orders.

A Low pass filter is a filter that passes low-frequency signals but attenuates signals with frequencies higher than the cutoff frequency.