A New Optimized Low-pass Iir Digital Differentiator
نویسندگان
چکیده
This paper describes a method for optimizing low-pass infinite impulse response (IIR) digital differentiators. The wide band differentiator is cascaded with low-pass IIR filter resulting in linear phase low-pass IIR digital differentiator. Further the frequency response of IIR differentiator is improved by altering the gain and denominator coefficients of that differentiator. The genetic algorithm approach is used for optimizing the least square error that is defined by the fitness function. The low order optimized IIR differentiator in this paper is almost completely approximate the higher order finite impulse response (FIR) differentiator.
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