A single-chip 2.4 GHz direct-conversion CMOS receiver for wireless local loop using one-third frequency local oscillator

Author

Kyeongho Lee ; Joonbae Park ; Jeong-Woo Lee ; Seung-Wook Lee ; Hyoung-Ki Huh ; Deog-Kyoon Jeong ; Wonchan Kim

Author_Institution

Global Commun. Technol. Inc., Los Altos, CA, USA

fYear

2000

fDate

15-17 June 2000

Firstpage

42

Lastpage

45

Abstract

A single-chip direct-conversion CMOS receiver for 2.4 GHz wide-band CDMA for wireless local loop (WLL) is described. The chip includes an LNA, a 12-phase down converter, a variable gain amplifier, a gm-C channel selection filter, a programmable PLL for 7 channel frequencies, and a 4-bit flash ADC. The proposed 12-phase down conversion scheme combined with a multi-phase sampling fractional-N prescaler, a cascaded DC-offset canceler and distributed AGC loops offers solutions to the problems of a direct conversion receiver. Experimental results show -115 dBm, sensitivity, 4.4 dB noise figure, and 95 dB dynamic range.

Keywords

CMOS integrated circuits; Code division multiple access; Microwave links; Mixed analog-digital integrated circuits; Radio access networks; Radio receivers; UHF integrated circuits; 12-phase down converter; 2.4 GHz; 4.4 dB; ASIC; LNA; WCDMA; cascaded DC-offset canceler; direct-conversion CMOS receiver; distributed AGC loops; flash ADC; gm-C channel selection filter; local oscillator; multiphase sampling fractional-N prescaler; one-third frequency LO; programmable PLL; single-chip CMOS receiver; variable gain amplifier; wideband CDMA; wireless local loop; Broadband amplifiers; Dynamic range; Filters; Frequency conversion; Gain; Multiaccess communication; Noise figure; Phase locked loops; Sampling methods; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits, 2000. Digest of Technical Papers. 2000 Symposium on

Conference_Location

Honolulu, HI, USA

Print_ISBN

0-7803-6309-4

Type

conf

DOI

10.1109/VLSIC.2000.852846

Filename

852846