用于WLAN的具有直流偏置抵消的直接转换混频器

2007 IEEE Bipolar/BiCMOS Circuits and Technology Meeting Pub Date : 2007-10-22 DOI:10.1109/BIPOL.2007.4351828

Qiming Xu, Xueqing Hu, Y. Jan, Yin Shi, F. F. Dai, R. Jaeger

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引用次数: 6

摘要

提出了一种符合IEEE 802.11a无线局域网标准的直接转换接收机用带直流偏置抵消电路的5GHz双平衡混频器。模拟反馈回路用于消除双平衡混频器输出端的直流偏置。测试结果表明，采用直流偏置抵消电路的混频器在5.15GHz时电压转换增益为9.5dB，噪声系数为13.5dB, IIP3为7.6 dBm，直流偏置电压为1.73mV，电源为3.3 v时功率为67mW。直流偏置抵消电路的额外面积小于0.1mm2，额外功耗为0.3mW。直接转换无线局域网接收机已在0.35 μ SiGe BiCMOS技术中实现。

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A Direct-Conversion Mixer with a DC-offset Cancellation for WLAN

This paper presents a 5GHz double-balanced mixer with DC-offset cancellation circuit for direct-conversion receiver compliant with IEEE 802.11a wireless LAN standard. The analog feedback loop is used, to eliminate the DC-offset at the output of the double-balanced mixer. The test results show that the mixer with DC-offset cancellation circuit has voltage conversion gain of 9.5dB at 5.15GHz, noise figure of 13.5dB, IIP3 of 7.6 dBm, 1.73mV DC-offset voltage and 67mW power with 3.3-V power supply. The DC-offset cancellation circuit has less than 0.1mm2 additional area and 0.3mW added power dissipation. The direct conversion WLAN receiver has been implemented in a 0.35mum SiGe BiCMOS technology.

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来源期刊

2007 IEEE Bipolar/BiCMOS Circuits and Technology Meeting

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