Analog Baseband for WCDMA Implementation by Using Digital-Controlled DC Offset Cancellation

摘要：

An analog baseband for Wideband Code-Division Multiple-Access (W-CDMA) direct-conversion receiver is presented. The baseband achieves 39dB gain with 3dB/step step and 2.1MHz cut-off frequency of <0.5dB passband ripple. The DC offset caused by LO selfmixing and I/Q mismatch are cancelled by compensation DACs in every PGA stage and the remaining output DC offset voltage is within ± 5mV. The DAC-based DCOC consumes only 150uA current and occupies only 0.003mm~2 chip area. The design was implemented in 0.13um CMOS technology with chip area of 1.92mm2 (with I/Q two paths), the analog baseband achieves in-channel OIP3 of 25.5dBm and consumes 26mA of one path with on chip ADC buffers under 1.2V power supply.

作者: Renzhong Xie Chen Jiang Weinan Li Yumei Huang Zhiliang Hong

作者单位: State Key Laboratory of ASIC and Systems, Fudan University, Shanghai 201203, China

会议类型: 国际会议

会议名称: 2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology(第十届固态和集成电路技术国际会议 ICSICT-2010)

会议地点: 上海

会议语种:英文

页码: 439-441

在线出版日期: 2010-11-01（万方平台首次上网日期，不代表论文的发表时间）