Title :
Switched-capacitor filters having very low sensitivity to capacitance ratio errors and to finite amplifier gains
Author :
Petraglia, Antonio ; Mandarano, Marcos
Author_Institution :
Dept. of Electr. Eng., Univ. Federal do Rio de Janeiro, Brazil
Abstract :
A number of circuit topologies have been proposed for the realization of low sensitivity switched-capacitor filters. One such approach is based on a parallel connection of two allpass sections so that low sensitivity with respect to capacitance ratios is achieved. Initially, an improved version of that implementation is proposed in this paper, resulting in a structure having very low sensitivity to capacitance ratio errors and to finite operational amplifier gains. Finally, simulation results comparing the new approach with two different cascade implementations are presented
Keywords :
active filters; all-pass filters; sensitivity analysis; switched capacitor filters; allpass section; capacitance ratio errors; circuit topologies; finite operational amplifier gain; parallel connection; sensitivity; simulation; switched-capacitor filters; Analytical models; Capacitance; Circuits; Computer errors; Cost function; Operational amplifiers; Power filters; Signal synthesis; Tiles; Transfer functions;
Conference_Titel :
Circuits and Systems, 1994., Proceedings of the 37th Midwest Symposium on
Conference_Location :
Lafayette, LA
Print_ISBN :
0-7803-2428-5
DOI :
10.1109/MWSCAS.1994.519216
