Current-mode OTA-C realisation of arbitrary filter characteristics

Author

Sun, Y. ; Fidler, J.K.

Author_Institution

Dept. of Electron., York Univ., UK

Volume

32

Issue

13

fYear

1996

fDate

6/20/1996 12:00:00 AM

Firstpage

1181

Lastpage

1182

Abstract

Two universal current-mode integrator-based OTA-C filter structures are presented. General explicit design formulas are derived. The filter architectures proposed are constructed using a canonical FLF configuration with an input distribution or output summation network. They are comprehensive in function. By setting any particular input distributing or output summing weights (transconductances), we can realise arbitrary approximation characteristics. It is also straightforward to obtain universal filter architectures and the corresponding design formulae of any particular order. The universal second and third order filters and design formulas are discussed in detail

Keywords

active filters; all-pass filters; band-pass filters; biquadratic filters; continuous time filters; high-pass filters; integrating circuits; linear network synthesis; low-pass filters; operational amplifiers; arbitrary approximation characteristics; canonical FLF configuration; current-mode OTA-C realisation; design formulas; input distribution network; integrator-based filter structures; output summation network; second order filters; third order filters; universal OTA-C filter structures; universal filter architectures;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:19960807

Filename

502989