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5.8‐GHz merged LNA‐mixer with on‐chip balun
Author(s) -
Chen HsienKu,
Sha J. R.,
Chang DaChiang,
Juang YingZong,
Chiu ChinFong
Publication year - 2006
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21394
Subject(s) - balun , rfic , noise figure , engineering , electrical engineering , transformer , low noise amplifier , electronic engineering , amplifier , chip , monolithic microwave integrated circuit , bicmos , electromagnetic coil , microwave , radio frequency , cmos , telecommunications , antenna (radio) , transistor , voltage
Abstract In this paper, the design and application of an on‐chip transformer balun for RFIC is presented. Single‐ended primary and differential secondary are constructed without using three individual windings for simple layout. Besides, this new topology has the same physical common visual ground point for second winding, which eliminates imbalance due to the potential difference at the ground from a conventional trifilar. Furthermore, this new on‐chip balun is successfully applied to the integration of a 5.8‐GHz low‐noise amplifier (LNA) mixer implemented on SiGe 0.35‐μm BiCMOS process then achieves 4.15‐dB noise figure (NF), 34.61‐dB conversion gain, and a −9.5‐dBm input 3 rd ‐order intercept‐point with low power consumption of 9 mW. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 508–511, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21394