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Differential amplifier with improved gain‐accuracy and linearity
Author(s) -
Wu R.,
Lidgey F. J.,
Hayatleh K.,
Hart B. L.
Publication year - 2010
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.601
Subject(s) - linearity , open loop gain , fully differential amplifier , amplifier , differential (mechanical device) , electronic engineering , differential gain , compensation (psychology) , differential amplifier , computer science , control theory (sociology) , operational amplifier , engineering , electrical engineering , cmos , artificial intelligence , psychology , semiconductor laser theory , control (management) , diode , psychoanalysis , aerospace engineering
Abstract A novel circuit design technique is presented which improves gain‐accuracy and linearity in differential amplifiers. The technique employs negative impedance compensation and results demonstrate a significant performance improvement in precision, lowering sensitivity, and wide dynamic range. A theoretical underpinning is given together with the results of a demonstrator differential input/output amplifier with gain of 12 dB. The simulation results show that, with the novel method, both the gain‐accuracy and linearity can be improved greatly. Especially, the linearity improvement in IMD can get to more than 23 dB with a required gain. Copyright © 2009 John Wiley & Sons, Ltd.