Analysis of LO leakage in CMOS Gilbert mixer by cadence spectreRF for direct conversion application

Jingjing Liu, M.A. Do, J.G. Ma, K.S. Yeo
April 2005
Cite Source Document DOI

Abstract

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 examined 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.

Type
Conference paper
Publication
In The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.
Jingjing Liu
Jingjing Liu
Associate Professor

My research interests include low-power smart micro-sensor integrated circuit design, image sensors, biomedical sensors, and energy harvesting circuits.