Nodal analysis of switched-current filters

Author

De Queiroz, Antôonio C M ; Pinheiro, Paulo R M ; Caloba, L.P.

Author_Institution

Univ. Federal de Rio de Janeiro, Brazil

Volume

40

Issue

1

fYear

1993

fDate

1/1/1993 12:00:00 AM

Firstpage

10

Lastpage

18

Abstract

An efficient and relatively simple approach to the systematic analysis of ideal, or near-ideal, switched-current filters is described. The technique is based on the nodal analysis of a linear resistive network that models the behavior of the filter for small signals, allowing the use of any practical topology and the inclusion of important imperfections, as output resistances of MOS transistors, series resistances of current-conducting switches, and parasitic capacitances. Techniques for frequency-domain analysis, z-transform calculations, time-domain analysis, and frequency-domain sensitivity analysis are discussed. The method is not restricted to the analysis of the particular structures of switched-current filters. It can be easily generalized for the analysis of a wide class of periodically switched RC-active circuits, where it is assumed that the circuits stabilize between the switching instants

Keywords

active filters; frequency-domain analysis; network analysis; sensitivity analysis; switched filters; time-domain analysis; frequency-domain analysis; linear resistive network; nodal analysis; periodically switched RC-active circuits; sensitivity analysis; small signals; switched-current filters; time-domain analysis; z-transform calculations; Frequency domain analysis; MOSFETs; Network topology; Nonlinear filters; Parasitic capacitance; Sensitivity analysis; Signal analysis; Switches; Switching circuits; Time domain analysis;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.215356

Filename

215356