Synthesizing switched-current filters by transposing the SFG of switched-capacitor filter circuits

Author

Roberts, G.W. ; Sedra, A.S.

Author_Institution

Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada

Volume

38

Issue

3

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

337

Lastpage

340

Abstract

A general synthesis method for switched-current (SI) filter circuits is presented. The SI filter circuit is obtained from the transpose of the signal-flow-graph (SFG) representation of a switched-capacitor (SC) filter realization. The resulting SI circuits realized the same transfer function as the SC filter circuit and, in addition, possess identical component sensitivities. Since the operation of SFG transposition is sensitivity preserving, application of the proposed method to low-sensitivity SC filter circuits will produce low-sensitivity SI filter circuits

Keywords

active filters; graph theory; network synthesis; switched filters; SC filter circuits; SFG transposition; SI filter circuit; low sensitivity circuits; sensitivity preserving; signal-flow-graph; switched-capacitor filter; switched-current filters; synthesis method; transfer function; CMOS process; Capacitors; Circuit synthesis; Digital filters; Digital signal processing; Operational amplifiers; Signal synthesis; Switches; Switching circuits; Voltage;

fLanguage

English

Journal_Title

Circuits and Systems, IEEE Transactions on

Publisher

ieee

ISSN

0098-4094

Type

jour

DOI

10.1109/31.101330

Filename

101330