Zobrazeno 1 - 10
of 37
pro vyhledávání: '"M.D. Early"'
Autor:
Karl-Erik Rydler, Jiri Streit, Ove Gunnarsson, Laurie Christian, M.D. Early, Bengt-Olof Andersson, Martin Šíra
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 62:1600-1607
We report on the performance of a simple method, known as the reference step method, to build up the dc voltage scale of a source. The key advantages of this method are that it relies on equipment that is readily available in most high-level laborato
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd28f4fc90407a56fc3f2d9b56943e2b
https://doi.org/10.1109/tim.2012.2230734
https://doi.org/10.1109/tim.2012.2230734
Autor:
Magdalena Ruiz, LingXiang Liu, H. Fujiki, A.Y.K. Yan, Hitoshi Sasaki, A. Charoensook, Bambang Suprianto, I. Budovsky, Yih-cheng Wei, M.D. Early, S.P.B. Leones, M. Klonz, M. Temba, A.R.B.Z. Abidin, A.K. Govil, N.A. Son, C. Kumtawee, Sung-Won Kwon, V.K. Rustagi
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 54:795-798
This paper presents preliminary results of the APMP.EM-K6a key comparison of AC-DC transfer conducted during 2000 to 2003. The AC-DC voltage transfer difference of the travelling standard was measured at 3 V and selected frequencies from 1 kHz to 1 M
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20845b985fc6910175f59bb452abcbac
https://doi.org/10.1109/tim.2004.843088
https://doi.org/10.1109/tim.2004.843088
Publikováno v:
29th Conference on Precision Electromagnetic Measurements (CPEM 2014).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae2c5ada6c78a0b4c66b8bb1449f0240
https://doi.org/10.1109/cpem.2014.6898297
https://doi.org/10.1109/cpem.2014.6898297
Publikováno v:
2012 Conference on Precision electromagnetic Measurements.
This paper summarizes a comparison between two methods of building the voltage scale. The first one is the Reference Step Method developed at the Measurement Standards Laboratory of New Zealand. The second one is based on a binary potentiometer repre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd46e5fa3b45509d5ddcf574b5626ac7
https://doi.org/10.1109/cpem.2012.6251042
https://doi.org/10.1109/cpem.2012.6251042
Publikováno v:
2012 Conference on Precision electromagnetic Measurements.
We report on the performance of a simple method, known as the Reference Step Method, to build up the dc voltage scale of a source. The key advantages of this method are that it relies on equipment that is readily available in most high-level laborato
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bca75d0b370c75a55719cd7d174c557
https://doi.org/10.1109/cpem.2012.6251021
https://doi.org/10.1109/cpem.2012.6251021
We have used a quadrature bridge to compare directly two quantum Hall resistors with two 10-nF capacitors at 1233 Hz. This approach eliminates uncertainties due to thermal and structural instabilities and to AC/DC differences of the wire resistors no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41bdadd9678264dc2ad486194cb0c856
https://nrc-publications.canada.ca/eng/view/object/?id=198c7094-aac1-4a8f-b945-59cc47ec8b3b
https://nrc-publications.canada.ca/eng/view/object/?id=198c7094-aac1-4a8f-b945-59cc47ec8b3b
We describe audiofrequency measurements of quantum Hall resistors mounted with and without back-gates. When appropriate potentials are applied to the gates, flat plateaux are obtained; but under these circumstances we find ambiguities in the measured
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::402f489bb2a72e90ad2b4ed81b143ab5
https://doi.org/10.1109/cpem.2002.1034959
https://doi.org/10.1109/cpem.2002.1034959
Publikováno v:
2008 Conference on Precision Electromagnetic Measurements Digest.
We 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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70064293328ded99e53b4f200c41b0be
https://doi.org/10.1109/cpem.2008.4574970
https://doi.org/10.1109/cpem.2008.4574970
Autor:
M.D. Early, Paul C. A. Roberts
Publikováno v:
2004 Conference on Precision Electromagnetic Measurements.
The presence of a normal mode ac voltage can generate a significant dc offset in a digital multimeter (DMM). We have measured this offset for a range of instruments and find that it is more pronounced in high performance DMM's. This effect is related
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::528a43e3bb2eee4a8a516ee98eb5200c
https://doi.org/10.1109/cpem.2004.305441
https://doi.org/10.1109/cpem.2004.305441
We describe audio frequency measurements of quantum Hall resistors mounted with and without back-gates. We show that by gating the devices, flat plateaux can be obtained, but this can also lead to ambiguities in the measured Hall values. The current
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f86940ce5279e1c4b31476a064b2b270
https://nrc-publications.canada.ca/eng/view/object/?id=b815de85-17c2-48c6-aad6-94843b4e5dbb
https://nrc-publications.canada.ca/eng/view/object/?id=b815de85-17c2-48c6-aad6-94843b4e5dbb