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TitleSources of normal mode offset in precision DMM's
Publication TypeConference Paper
Year of Publication2008
AuthorsMoore, B., Early M.D., and Christian L.A.
Conference NameCPEM Digest (Conference on Precision Electromagnetic Measurements)
Date Published2008
KeywordsAmplifiers (electronic), Circuit simulation, Electromagnetic measurements, Electromagnetism, Front-end amplifiers, Normal modes, Simulation tools
AbstractWe investigate the causes of the observed normal mode offsets in precision DMM's. With a circuit simulation tool to model the front-end amplifier we have been able to qualitatively reproduce the observed offset in a commonly used 8.5 digit precision DMM. In general the cause of the offset is related to the symmetry of the front-end architecture. However it seems there are several mechanisms which contribute to the effect, and it is these that we are presently seeking to elucidate. ©2008 IEEE.

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