Title :
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
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;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2004. Digest of Papers. 2004 IEEE
Print_ISBN :
0-7803-8333-8
DOI :
10.1109/RFIC.2004.1320707
