Approximated Fractional Order Chebyshev Lowpass Filters

Todd Freeborn, Brent Maundy and Ahmed S. Elwakil

Mathematical Problems in Engineering, 2015, vol. 2015, 1-7

Abstract:

We propose the use of nonlinear least squares optimization to approximate the passband ripple characteristics of traditional Chebyshev lowpass filters with fractional order steps in the stopband. MATLAB simulations of , , and order lowpass filters with fractional steps from = 0.1 to = 0.9 are given as examples. SPICE simulations of 1.2, 1.5, and 1.8 order lowpass filters using approximated fractional order capacitors in a Tow-Thomas biquad circuit validate the implementation of these filter circuits.

Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlmpe:832468

DOI: 10.1155/2015/832468

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