内容标题28

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                巴特沃斯Pi LC低通滤波器计今晚两人在这过夜就是了算器

                输入数值
                 
                Cutoff Frequency:
                Impedance Z0:
                Number of Components: (1-11)
                 
                 
                计算结果
                Inductance: Capacitance:
                Unit : Unit :
                L1: C1:
                L2: C2:
                L3: C3:
                L4: C4:
                L5: C5:
                  C6:
                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.
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