Design of a High-Linearity RF Front-End With IP2 Calibration for SAW-Less WCDMA Receivers
A fully integrated receiver RF front-end designed in 0.13μm CMOS that meets the WCDMA system requirements is presented. The receiver RF front-end requires no interstage SAW filter. To handle the stringent linearity requirements in terms of both IPS and IP2 set for the RF front-end, a current-mode passive mixer constructing a built-in high-Q bandpass filter is adopted to suppress blockers including the transmitter leakage, and an IP2 calibration circuit is applied to the mixer. A new start-up circuit is proposed for the operational amplifier in the transimpedance amplifier. To generate the quadrature clocks, a three-stage RC polyphase filter is used. The measurement results show that, owing to this high-linearity RF front-end, the receiver achieves 15dBm IIP3 and +72dBm IIP2, which satisfies the WCDMA SAWless requirements.
Song Hu Weinan Li Yumei Huang Zhiliang Hong
State Key Laboratory of ASIC & 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
1175-1178
2011-10-25（万方平台首次上网日期，不代表论文的发表时间）