直接转换用CMOS吉尔伯特混频器中LO失配引起的LO泄漏分析

The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI:10.1109/APCCAS.2004.1412753

J.J. Liu, M. Do, J. Ma, K. Yeo

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引用次数: 3

摘要

直接转换接收机混频器中由LO-RF馈通引起的直流偏置是一个严重的问题。对双平衡CMOS Gilbert混频器中LO失配引起的LO泄漏进行了检测和分析，分为无LO失配、只有LO相位失配、只有LO幅度失配和两种失配组合四种情况。推导了失配与本极漏的关系。仿真结果与分析结果一致

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Analysis of LO leakage due to LO mismatch in CMOS Gilbert mixer for direct conversion application

The DC offset caused by the LO-RF feedthrough in the mixer of a direct conversion receiver is a serious problem. The LO leakage caused by the LO mismatch in double-balanced CMOS Gilbert mixers is examine and analyzed in four cases, no LO mismatch, LO phase mismatch only, LO amplitude mismatch only and the combination of the two mismatches. The relation between the mismatch and the LO leakage is derived. Simulation results shown are consistent with the analysis

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The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.

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