Current-mode multiple-feedback filters

Author

Carlosena, Alfonso ; Serrano, Luis ; Porta, Sonia

Author_Institution

Dept. of Autom., Electron. e Ingenieria de Sistemas, Univ. Publica de Navarra, Pamplona, Spain

Volume

40

Issue

2

fYear

1993

fDate

2/1/1993 12:00:00 AM

Firstpage

141

Lastpage

143

Abstract

A different class of operational-amplifier-based biquadratic filters, the infinite-gain multiple-feedback filters, is transformed into its current version. This class has so far eluded any such transformation because the operational-amplifier is configured without resistive feedback loop. The current-mode multiple-feedback filters contain also a single operational-amplifier as the active element, and therefore an absolute comparison between voltage and current versions is feasible. The authors demonstrate, both theoretically and practically, that the current-mode multiple-feedback filters can extend the useful bandwidth with respect to their classical voltage-mode counterparts up to nearly the GB product of the operational-amplifier. This result is particularly interesting because voltage- and current-mode multiple-feedback filters contain exactly the same active and passive components

Keywords

active filters; feedback; frequency response; operational amplifiers; bandwidth; biquadratic filters; current-mode; multiple-feedback filters; op amp based filter; operational-amplifier; Band pass filters; Bandwidth; Circuit analysis; Current mode circuits; Feedback amplifiers; Feedback loop; Frequency; Operational amplifiers; Transfer functions; Voltage;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/81.219829

Filename

219829