Title :
Approximating linear phase with IIR SC filters
Author :
Pereira, Jaqueline S. ; Petraglia, Antonio ; Quelhas, Mauricio F.
Author_Institution :
COPPE, Univ. Fed. do Rio de Janeiro, Brazil
Abstract :
It has been recently shown that linear phase can be efficiently approximated by an IIR SC filter structure realizing denominator order smaller than the numerator order. This paper compares such an approach to phase equalized cascade and ladder structures implementing elliptic approximations, and to the conventional linear-phase FIR designs. Comparative measures include power dissipation, capacitance spread, total capacitor area, and sensitivity to process variations regarding capacitance ratios.
Keywords :
IIR filters; frequency response; linear phase filters; switched capacitor filters; transfer functions; IIR SC filter structure; capacitance ratios; capacitance spread; denominator order; linear phase approximation; numerator order; power dissipation; process variations sensitivity; total capacitor area; Capacitance; Chebyshev approximation; Finite impulse response filter; Frequency; IIR filters; Linear approximation; Narrowband; Nonlinear filters; Poles and zeros; Transfer functions;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010533
