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Author Stewart, D. ♦ Saavedra, C.E.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2015
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Radio frequency ♦ Power measurement ♦ Detectors ♦ Frequency measurement ♦ CMOS integrated circuits ♦ Table lookup ♦ Mixers
Abstract A technique is presented to improve both the input 1-dB compression point (IP1dB) and the third-order intercept point (IP3) of a mixer using real-time knowledge of the incident RF power to the mixer plus look-up tables (LUTs) that contain measured performance data of mixer under different bias conditions. The concept is applied to an active mixer designed in-house on 130 nm CMOS technology. The mixer has a modified Gilbert-cell topology where the dc bias currents of the RF stage and the LO switching stage are independent of each other. Experimental tests reveal that the IP1dB of the mixer can be increased by +8.7 dB from a baseline value of -12.1 dBm to - 3.3 dBm using the digital assist and its IIP3 can be improved by +5.9 dB from -3.11 dBm to +2.83 dBm with the technique.
Description Author affiliation: Dept. of Electr. & Comput. Eng., Queen's Univ., Kingston, ON, Canada (Stewart, D.; Saavedra, C.E.)
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2015-10-04
Publisher Place Canada
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
e-ISBN 9781467365550
Size (in Bytes) 1.67 MB
Page Count 4
Starting Page 1
Ending Page 4


Source: IEEE Xplore Digital Library