Approximated Fractional Order Chebyshev Lowpass Filters

@inproceedings{Freeborn2015ApproximatedFO,
  title={Approximated Fractional Order Chebyshev Lowpass Filters},
  author={Todd J. Freeborn and Brent Maundy and Ahmed S. Elwakil},
  year={2015}
}
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… CONTINUE READING

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