A Low-Power Gm-R-C Image Rejection Filter for Complex Low-IF Receiver
In this paper, a lst-order Gm-R-C complex filter cell for image rejection in low-IF receivers is proposed. The cell adopts low-power fully differential Gm-cells with RC load to perform low-pass filtering for the input IIQ signals. Frequency translation is realized by two additional differential Gm cells through directly cross-adding relevant currents. Based on the proposed lst-order cell, a 4th-order Butterworth complex filter with center frequency at 300 KHz and bandwidth of 160 KHz is designed in 0.18 μm CMOS technology. Simulated results show that the filter achieves an image rejection ratio of 62 dB, an in-band SFDR of 58.9 dB, a pass-band gain of 18 dB, and an input referred noise of 19.4 μVms, while consuming only 593μA from a 2.7 V supply.
Hao Li Hong Zhang Xunwei Weng Ruizhi Zhang
Department of Microelectronics, Xian Jiaotong University, Xian 710049, 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
1071-1074
2011-10-25（万方平台首次上网日期，不代表论文的发表时间）