Efficient SI wave elliptic filters based on direct and inverse Bruton transformations

Author

Lancaster, J.D. ; Al-Hashimi, B.M. ; Moniri, M.

Author_Institution

Sch. of Eng. & Adv. Technol., Staffordshire Polytech., Stafford, UK

Volume

146

Issue

5

fYear

1999

fDate

10/1/1999 12:00:00 AM

Firstpage

235

Lastpage

241

Abstract

The paper describes an efficient method for designing switched-current elliptic-wave filters. The method is based on applying direct or inverse Bruton circuit transformation to an LC reference prototype prior to obtaining the equivalent wave filter. The method provides significant reduction in the switched-current circuit complexity, particularly for high-order filters, when compared with previously published results. This is achieved by applying a suitable Bruton transformation to an appropriate prototype which results in simplified and reduced number of wave adapters. Simulation results based on 1.2 μm CMOS digital process for highpass and bandpass elliptic filters are also included

Keywords

CMOS analogue integrated circuits; active filters; band-pass filters; elliptic filters; high-pass filters; switched current circuits; 1.2 micron; CMOS digital process; LC reference prototype; SI wave elliptic filters; bandpass filters; direct Bruton transformations; elliptic-wave filters; equivalent wave filter; high-order filters; highpass filters; inverse Bruton transformations; switched-current circuit complexity; wave adapters;

fLanguage

English

Journal_Title

Circuits, Devices and Systems, IEE Proceedings -

Publisher

iet

ISSN

1350-2409

Type

jour

DOI

10.1049/ip-cds:19990539

Filename

809339