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Design of a Low-Voltage and Low-Distortion Mixer Through Volterra-Series Analysis

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2 Author(s)
Shan He ; Dept. of Electr. & Comput. Eng., Queen's Univ., Kingston, ON, Canada ; Saavedra, C.E.

The factors that impact the intermodulation distortion performance of an active downconverting mixer are investigated. Through a Volterra-series analysis of the RF transconductor stage of the mixer, design principles are formulated to maximize the mixer's IIP3. To verify the theoretical analysis, a 0.3-1.2-GHz low-voltage mixer operating from a 0.9-V supply was designed, fabricated, and tested. The mixer employs a common-gate common-source RF transconductor stage with simultaneous distortion and noise cancellation. Experimental results reveal that the mixer can yield an IIP3 of - 0.8 dBm, a double-sideband noise figure below 4.8 dB, and a maximum conversion gain of 8.8 dB.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:61 ,  Issue: 1 )

Date of Publication:

Jan. 2013

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