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Design and Optimization of a Direct-Conversion Double-Balanced Mixer for RF Receiver Front-End

Frederick Ray Gomez

Article ID: 800
Vol 1, Issue 3, 2018, Article identifier:

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Abstract

Differential implementation is becoming highly favoured in RFIC (radio frequency integrated circuit) design, notably its high immunity to common-mode noises, acceptable rejection of parasitic coupling, and increased dynamic range. One specific RF front-end building block that is usually designed as a differential circuit is the mixer.  This technical paper presents a study of a differential mixer, notably the double-balanced mixer implemented on a direct-conversion architecture in a standard 90nm CMOS (complementary metal-oxide semiconductor) process.  Operating frequency is set at 5GHz, which is a typical frequency for RF (radio frequency) receiver.   Impedance matching was essential to fully optimize the mixer design.  The direct-conversion double-balance mixer design eventually achieved conversion gain of 11.463dB and noise figure of 16.529dB, comparable to mixer designs from past research and studies.


Keywords

Double-balanced mixer; direct conversion; conversion gain; noise figure; RF front-end

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DOI: http://dx.doi.org/10.18063/peee.v1i3.800
(377 Abstract Views, 187 PDF Downloads)

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Copyright (c) 2018 Frederick Ray Gomez

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