Title :
A new method for the design of IIR filters with flat magnitude response
Author :
Fernandez-Vazquez, Alfonso ; Jovanovic-Dolecek, Gordana
Author_Institution :
Instituto Nacional de Astrofisica, Opt. y Electron., Puebla
Abstract :
This paper presents a new direct design of infinite-impulse response (IIR) filters with a flat magnitude response in both passband and stopband (Butterworth filters). The design specifications are passband and stopband frequencies and passband droop and stopband attenuation. The approach is based on an allpass filter with flatness at frequency points omega=0 and omega=pi. Depending on the parity of the IIR filter order, the allpass filter is either real or complex. However, in both cases, the resulting IIR filter is real
Keywords :
Butterworth filters; IIR filters; all-pass filters; Butterworth filters; IIR filters; all-pass filters; digital filters; flat magnitude response; infinite-impulse response filters; passband droop; passband frequencies; stopband attenuation; stopband frequencies; Attenuation; Delay; Design methodology; Digital filters; Equations; Frequency; IIR filters; Optical filters; Passband; Quantization; Allpass filters; allpole filters; digital filters; flat infinite-impulse response (IIR) filters;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2006.877891
