A Dual-mode Analog Baseband Utilizing Digital- assisted Calibration for WCDMA/GSM Receivers
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 smallarea 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 DCoffset after DCOC without performance penalty and the measured I1P2 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.
Renzhong Xie Chen Jiang Weinan Li Yumei Huang Zhiliang Hong
State Key Laboratory of ASIC and System, Fudan University, Shanghai, 201203 China
国际会议
2011 IEEE 9th International Conference on ASIC(2011年第九届IEEE国际专用集成电路大会)
厦门
英文
1135-1138
2011-10-25（万方平台首次上网日期，不代表论文的发表时间）