Title :
Low-sensitivity direct-form IIR SC filters with improved phase linearity
Author :
Pereira, Jacqueline S. ; Petraglia, Antonio
Author_Institution :
Dept. of Electr. Eng., Univ. Federal do Rio de Janeiro, Brazil
Abstract :
This paper presents a novel approach for the design of infinite impulse response (IIR) switched-capacitor (SC) filters, based on the optimum allocation of poles and zeros of a transfer function. This approach is aimed at the reduction of sensitivity in the passband and improved phase linearity. Comparisons with classical filter designs are made. An illustrative design example of a proposed low-pass IIR SC filter structure is presented along with experimental results obtained from a prototype filter built and tested in the laboratory
Keywords :
IIR filters; low-pass filters; network synthesis; pole assignment; sensitivity analysis; switched capacitor filters; transfer functions; zero assignment; IIR switched-capacitor filters; direct-form IIR SC filters; infinite impulse response; low-pass SC filter structure; low-sensitivity SC filters; optimum allocation; phase linearity; poles and zeros; transfer function; Attenuation; Capacitance; Chebyshev approximation; Frequency; IIR filters; Iterative algorithms; Linearity; Passband; Poles and zeros; Transfer functions;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.856023
