A high order multi-bit σδ modulator for multi-standard wireless receiver

Author

Zhang, Ling ; Nadig, Vinay ; Ismail, Mohammed

Author_Institution

Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA

Volume

3

fYear

2004

fDate

25-28 July 2004

Abstract

The next generation of cellular systems increasingly similar to a data communication system. Not only it transfers voice and multimedia data, it is also been integrated with WLAN to access Internet whenever possible. Thus these cellular systems need highly integrated multi-standard receivers. The design of the A/D converter in such receivers is a big challenge. A reconfigurable σδ modulator which is suitable for GSM/WCDMA/WLAN standards, is introduced in this paper. According to the different signal bandwidth and dynamic range (DR) specifications, this σδ modulator is reconfigured to achieve the required dynamic range with less power consumption. The prototype is implemented in TSMC 0.18 μm CMOS process with 1.8 V power supply.

Keywords

CMOS integrated circuits; analogue-digital conversion; cellular radio; circuit simulation; code division multiple access; radio receivers; sigma-delta modulation; wireless LAN; 0.18 micron; 1.8 V; A/D converter design; GSM standards; TSMC CMOS process; WCDMA standards; WLAN standards; cellular systems; data communication system; high order multibit sigma-delta modulator; multistandard wireless receiver; power consumption; Bandwidth; CMOS process; Data communication; Dynamic range; Energy consumption; GSM; Internet; Multiaccess communication; Prototypes; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on

Print_ISBN

0-7803-8346-X

Type

conf

DOI

10.1109/MWSCAS.2004.1354374

Filename

1354374