A dual-mode analog baseband utilizing digital-assisted calibration for WCDMA/GSM receivers

Author

Xie, Renzhong ; Jiang, Chen ; Li, Weinan ; Huang, Yumei ; Hong, Zhiliang

Author_Institution

State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China

fYear

2011

fDate

25-28 Oct. 2011

Firstpage

1058

Lastpage

1061

Abstract

A dual-mode analog baseband with digital-assisted calibration for WCDMA/GSM receivers is presented. The calibration includes automatic DC-offset Calibration (DCOC) and Automatic Frequency Tuning (AFT). The calibration circuits adopt low-complexity and small-area Digital-to-Analog convertors (DAC) that can achieve less than 5mV residual output offset combined with Successive Approximation algorithm (SAR). Every Programmable Gain Amplifier (PGA) stage has small DC-offset after DCOC without performance penalty and the measured IIP₂ is more than 60dBm. The cutoff frequency of Low Pass Filter (LPF) can be tuned very close to targeted value of 200 kHz and 2.1 MHz for GSM and WCDMA, respectively. The chip is manufactured in 0.13 μm CMOS technology with power supply of 1.5 V and occupies 1.2mm² silicon area excluding pads.

Keywords

calibration; cellular radio; code division multiple access; low-pass filters; radio receivers; WCDMA/GSM receivers; automatic DC-offset calibration; automatic frequency tuning; digital-assisted calibration; digital-to-analog convertors; dual-mode analog baseband; frequency 2.1 MHz; frequency 200 kHz; low pass filter; programmable gain amplifier; size 0.13 mum; successive approximation algorithm; voltage 1.5 V; CMOS integrated circuits; CMOS technology; Digital video broadcasting; GSM; Gain measurement; Receivers; Solids;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC (ASICON), 2011 IEEE 9th International Conference on

Conference_Location

Xiamen

ISSN

2162-7541

Print_ISBN

978-1-61284-192-2

Electronic_ISBN

2162-7541

Type

conf

DOI

10.1109/ASICON.2011.6157390

Filename

6157390