A novel Q-enhanced LC switched-capacitor bandpass filter for digital wireless RF applications

Author

El Oualkadi, Ahmed ; Paillot, Jean-Marie ; Guegnaud, Hervé ; Allam, Rachid

Author_Institution

LAII-ESIP, Univ. de Poitiers, Angouleme, France

fYear

2004

fDate

6-8 June 2004

Firstpage

659

Lastpage

662

Abstract

In this paper, a novel architecture for a high-Q switched-capacitor bandpass filter, in 0.35 μm CMOS, is presented and tested. The proposed architecture allows high selectivity tuning over a broad band in the radiofrequency range. This circuit is intended to replace surface acoustic wave (SAW) filters; it can be employed in the field of low-cost wireless communications as a subset for professional mobile phones [380-520 MHz]. Experimental results obtained from a prototype show a tunable center frequency range of 268 MHz [240-508 MHz], with quality factors up to 300.

Keywords

CMOS integrated circuits; Q-factor; UHF filters; UHF integrated circuits; active filters; band-pass filters; circuit tuning; switched capacitor filters; 0.35 micron; 268 MHz; 380 to 520 MHz; LC switched-capacitor filter; Q-enhanced bandpass filter; broad band tuning selectivity; digital wireless RF; high-Q CMOS active filter; low-cost wireless communications; mobile phones; tunable center frequency range; Acoustic testing; Acoustic waves; Band pass filters; Circuit optimization; Circuit testing; Communication switching; Radio frequency; Surface acoustic waves; Tuning; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits (RFIC) Symposium, 2004. Digest of Papers. 2004 IEEE

ISSN

1529-2517

Print_ISBN

0-7803-8333-8

Type

conf

DOI

10.1109/RFIC.2004.1320707

Filename

1320707