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A linearized and low noise CMOS mixer with B‐type amplifier‐based sub‐harmonic balun
Author(s) -
Zhao Lv,
Wang Chunhua
Publication year - 2016
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2207
Subject(s) - balun , noise figure , frequency mixer , local oscillator , electrical engineering , cmos , harmonic mixer , linearity , low noise amplifier , total harmonic distortion , amplifier , electronic engineering , noise (video) , engineering , voltage , radio frequency , computer science , antenna (radio) , artificial intelligence , image (mathematics)
Summary A low noise and high linearity down‐conversion CMOS mixer for 2.4‐GHz wireless receiver is presented in this paper. Using a sub‐harmonic balun with a simple but effective B‐type amplifier, the local oscillator frequency required for this mixer has been reduced by half, and the input local oscillator signal could be single‐ended rather than differential, which simultaneously simplifies the design of local oscillator. A distortion and noise cancelation transconductor in association with current bleeding technique is employed to improve the noise and linearity of the entire mixer under a reduced bias current without compromising the voltage gain. Fabricated in a 0.18‐µm RF CMOS technology of Global Foundries, the mixer demonstrates a voltage gain of 15.8 dB and input‐referred third‐order intercept point of 6.6 dBm with a noise figure of 2.6 dB. It consumes 7.65 mA from a 1.0‐V supply and occupies a compact area of 0.75 × 0.71 mm 2 including all test pads. Copyright © 2016 John Wiley & Sons, Ltd.