IEICE Electronics Express
Online ISSN : 1349-2543
LETTER
A linearization technique for active mixers in zero-IF receivers with inherent balun
Mahdi BaratiMohammad Yavari
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JOURNALS FREE ACCESS

2011 Volume 8 Issue 24 Pages 2080-2086

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Abstract

A new technique with two different structures for linearization of active mixers in zero-IF receivers is presented. The proposed technique improves the IIP2 more than 20dB by removing the transconductance common mode current at the mixer's output and IIP3 more than 5dB in comparison with a basic Gilbert-cell mixer at equal conversion gain. Also, this technique allows us to use a single-ended input in a fully differential structure without needing a bulky and noisy balun. These improvements are achieved at the cost of 0.8dB increase in NF and also 0.6 mA more current dissipation in one structure.

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© 2011 by The Institute of Electronics, Information and Communication Engineers
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