Analysis of mirror mismatch and clock-feedthrough in Bruton transformation switched current wave filters

Author

Al-Hashimi, B.M. ; Xie, Y. ; Zwolinski, M.

Author_Institution

Dept. of Electron. & Comput. Sci., Southampton Univ., UK

Volume

150

Issue

1

fYear

2003

fDate

2/1/2003 12:00:00 AM

Firstpage

6

Lastpage

15

Abstract

The paper describes the modelling and analysis of the non-ideal performance of recently introduced Bruton transformation switched current (SI) wave filters. Two sources of errors are considered: mismatching in current mirrors and clock-feedthrough in delay cells. Using transistor-level realisations, analytical non-ideal models for the main components of Bruton transformation wave filters are developed, including capacitive source and load, and frequency dependent negative resistors. These models are integrated with MATLAB to study the influence of these errors on the filter frequency response. The non-ideal performance of 3rd-order low-pass and 5th-order high-pass elliptic filters using second-generation and S²I delay cells are analysed and included.

Keywords

active filters; current mirrors; delay circuits; elliptic filters; frequency response; high-pass filters; low-pass filters; switched current circuits; Bruton transformation; MATLAB; S²I delay cells; capacitive load; capacitive source; clock-feedthrough; current mirrors; delay cells; elliptic filters; error sources; frequency dependent negative resistors; frequency response; high-pass filters; low-pass filters; mirror mismatch; mismatching; nonideal performance; switched current wave filters; transistor-level realisations;

fLanguage

English

Journal_Title

Circuits, Devices and Systems, IEE Proceedings -

Publisher

iet

ISSN

1350-2409

Type

jour

DOI

10.1049/ip-cds:20030265

Filename

1192249