A dual-mode analog baseband with digital-assisted DC-offset calibration for WCDMA/GSM receivers

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

来源：Chinese Journal of Semiconductors, 2011, 32(12): 125001:1-125001:6.

DOI：10.1088/1674-4926/32/12/125001

• Analog baseband
• Base bands
• CMOS technology
• Core area
• DC offsets
• digital-assisted DCOC
• Dual modes
• Gain settings
• Offset voltage
• On-chip buffers
• Re-configurable

A dual-mode analog baseband with digital-assisted DC-offset calibration (DCOC) for WCDMA/GSM receiver is presented. A digital-assisted DCOC is proposed to solve the DC-offset problem by removing the DC-offset component only. This method has no bandwidth sacrifice. After calibration the measured output residual offset voltage is within 5 mV at most gain settings and the IIP 2 is more than 60 dBm. The baseband is designed to be reconfigurable at bandwidths of 200 kHz and 2.1 MHz. Total baseband gain can be programmed from 6 to 54 dB. The chip is manufactured with 0.13 μm CMOS technology and consumes 10 mA from a 1.5 V supply in the GSM mode including an on-chip buffer while the core area occupies 1.2 mm2.

• 出版日期2011
• 单位专用集成电路与系统国家重点实验室; 复旦大学