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Low‐noise GaInP/GaAS HBT wideband dual feedback amplifiers using Kukielka and Meyer topologies
Author(s) -
Syu JinSiang,
Wu TzungHan,
Meng Chinchun,
Huang GuoWei
Publication year - 2010
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.25280
Subject(s) - wideband , amplifier , negative feedback amplifier , shunt (medical) , heterojunction bipolar transistor , electronic engineering , noise figure , topology (electrical circuits) , network topology , bandwidth (computing) , engineering , electrical engineering , microwave , computer science , transistor , telecommunications , operational amplifier , voltage , computer network , medicine , bipolar junction transistor , cardiology
GaInP/GaAs HBT inductorless wideband amplifiers using shunt‐series shunt‐shunt dual‐feedback topology (Kukielka topology) and shunt‐series series‐shunt dual‐feedback topology (Meyer topology) are demonstrated in this article. Three amounts of feedback are applied on each topology. At the high‐gain mode, the Kukielka/Meyer wideband amplifier achieves the small‐signal power gain of 30/27 dB with the 3‐dB bandwidth of 6 GHz at a 5 V supply. The noise figure of both amplifiers is lower than 3 dB within 6 GHz. To increase the amount of feedback widens the bandwidth at the cost of power gain and noise figure degradation. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1486–1489, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25280