Approximated Fractional-Order Inverse Chebyshev Lowpass Filters

作者：Freeborn Todd J; Elwakil Ahmed S^*; Maundy Brent

来源：Circuits, Systems, and Signal Processing, 2016, 35(6): 1973-1982.

DOI：10.1007/s00034-015-0222-2

• Fractional-order circuits
• Fractional-order filters
• Analog filter circuits
• Fractional calculus

In this paper we use a least-squares fitting routine to approximate the stopband ripple characteristics of fractional-order inverse Chebyshev lowpass filters which have fractional-order zeros and poles. MATLAB simulations of -order lowpass filters with fractional steps from to are given as examples. SPICE simulations of 1.2-, 1.5-, and 1.8-order lowpass filters and experimental results of a 1.5-order filter using approximated fractional-order capacitors in a Multiple-Input Biquad circuit validate the implementation of these circuits.

• 出版日期2016-6