A dual-mode analog baseband with digital-assisted DC-offset calibration for WCDMA/GSM receivers  

作　　者：谢任重 江晨 李伟男 黄煜梅 洪志良 

机构地区：[1]State Key Laboratory of ASIC and System,Fudan University

出　　处：《Journal of Semiconductors》2011年第12期95-100,共6页半导体学报（英文版）

基　　金：Project supported by the National High Technology Research and Development Program of China(Nos.2009AA01Z261,2009ZX01031- 003 -002 )

摘　　要：A dual-mode analog baseband with digital-assisted DC-offset calibration （DCOC） for WCDMA/GSM receiver is presented. A digital-assisted DCOC is proposed to solve the DC-offset problem by removing the DC- offset component only. This method has no bandwidth sacrifice. After calibration the measured output residual offset voltage is within 5 mV at most gain settings and the IIP2 is more than 60 dBm. The baseband is designed to be reconfigurable at bandwidths of 200 kHz and 2.1 MHz. Total baseband gain can be programmed from 6 to 54 dB. The chip is manufactured with 0.13μm CMOS technology and consumes 10 mA from a 1.5 V supply in the GSM mode including an on-chip buffer while the core area occupies 1.2 mm^2.A dual-mode analog baseband with digital-assisted DC-offset calibration （DCOC） for WCDMA/GSM receiver is presented. A digital-assisted DCOC is proposed to solve the DC-offset problem by removing the DC- offset component only. This method has no bandwidth sacrifice. After calibration the measured output residual offset voltage is within 5 mV at most gain settings and the IIP2 is more than 60 dBm. The baseband is designed to be reconfigurable at bandwidths of 200 kHz and 2.1 MHz. Total baseband gain can be programmed from 6 to 54 dB. The chip is manufactured with 0.13μm CMOS technology and consumes 10 mA from a 1.5 V supply in the GSM mode including an on-chip buffer while the core area occupies 1.2 mm^2.

关 键 词：analog baseband digital-assisted DCOC reconfigurable receiver 

分 类 号：TN929.53[电子电信—通信与信息系统] TN851[电子电信—信息与通信工程]