Dual-mode bluetooth/wireless local area network channel-select filter for direct conversion receivers

Author

Alzaher, Hussain ; Hussein, Ahmed ; Tasadduq, Noman

Author_Institution

Electr. Eng. Dept., King Fahd Univ. of Pet. & Miner. (KFUPM), Dhahran, Saudi Arabia

Volume

5

Issue

3

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

189

Lastpage

195

Abstract

System level analysis is used to extract various specifications of the channel select filter for integrated dual-mode CMOS bluetooth (BT)/wireless local area network (WLAN; IEEE 802.11b) receivers. A digitally programmable active-RC filter suitable for direct conversion topology is presented. Six-bit R-2R ladders are used to adjust the filter bandwidth with tuning resolution better than 1.56%. Experimental results obtained from 0.35 μm CMOS chips show that using a fourth-order filter satisfies the selectivity requirements of both applications. The filter exhibits spurious free dynamic range of 70.6 and 61.2 dB for BT and WLAN, respectively.

Keywords

Bluetooth; CMOS integrated circuits; IEEE standards; active filters; radio receivers; wireless LAN; IEEE 802.11b; WLAN; active RC filter; direct conversion receiver; direct conversion topology; dual-mode bluetooth; filter bandwidth; fourth-order filter; integrated dual-mode CMOS bluetooth; size 0.35 mum; system level analysis; tuning resolution; wireless local area network channel select filter; wireless local area network receiver;

fLanguage

English

Journal_Title

Circuits, Devices & Systems, IET

Publisher

iet

ISSN

1751-858X

Type

jour

DOI

10.1049/iet-cds.2010.0078

Filename

5893980