A system for measuring magnetic core noise as a function of the magnetization level

Yoshihiro, Akira; Kajiwara, K.; Mori, Keiichi; Sonoda, T.; Ueda, Ryuzo; Miki, Y.

doi:10.1109/20.390149

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…[1][2][3][4][5][6] In practice, we have become convinced that they have performed to their specifications by evaluating performances of a faint-leak, current sensor, 7 of a core noise measurement system, 8 and of a highly stable thermostat. 9 However, when we began to make repetition measurements of a dc voltage of V order or less, using HP3457As ͑and subsequently, 3458As͒ on the minimum ranges ͑0.03 or 0.3 V͒, we encountered instability in each reading, a nonrepeatability.…”

Section: Introductionmentioning

confidence: 99%

Noise investigation of a high precision digital multimeter model HP3457A or HP3458A for microvolt level dc voltage measurements

Ueda

Takajo

Kazihara

1999

Review of Scientific Instruments

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A high temperature apparatus for measurement of the Seebeck coefficient Rev. Sci. Instrum. 82, 063905 (2011);A new correlation method for high sensitivity current noise measurements Rev.This article examines noise characteristics of a high precision digital multimeter HP3457A or HP3458A by presenting a conceptual but useful model for the generation of zero voltage error under short-circuited input terminals. Two setting states, auto-zero on ͑AZ-ON͒ and off ͑AZ-OFF͒ are tested and one important conclusion derived is that the state of AZ-OFF has a more extensive potential of performing to the full specifications for measurements of V level dc voltage than that of AZ-ON.

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Section: Introductionmentioning

confidence: 99%

Noise investigation of a high precision digital multimeter model HP3457A or HP3458A for microvolt level dc voltage measurements

Ueda

Takajo

Kazihara

1999

Review of Scientific Instruments

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“…2 In relation to it, a magnetic core noise measurement system has also been developed for inquiring closely into the core qualified for their sensors. 3 All of them require accurate and precise extraction of the instantaneous value of a small signal ͑less than V͒. A serious problem then arose: Do operational amplifiers which are labeled as low noise and high precision types amplify such a signal with sufficient accuracy?…”

Section: Introductionmentioning

confidence: 99%

On derivation of a thermal transfer model of a thermostat housing a heat source with several watts

Kazihara

Yoshihiro

Sonoda

et al. 1997

Review of Scientific Instruments

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Temperature stabilized effusion cell evaporation source for thin film deposition and molecular-beam epitaxy Rev.A very precisely regulated compact thermostat for small-angle neutron scattering Rev.This article presents a trial for deriving a thermal transfer model of a thermostat housing a heat source generating several watts and achieving high temperature stabilization. It is intended for investigating the open-loop linearity of operational amplifiers labeled as high precision or low noise and their noise characteristics. This thermostat is built up with a double-jacket constructed with a copper plate of 10 mm thickness and an approach of deriving a lumped parameter model to each jacket on the temperature control is presented. The temperature stability of the order of 3 ϫ 10 Ϫ5°C per 1°C temperature change in the air outside in 1 h is realized in the inner jacket. The linearity is measurable and it is clarified that amplifiers are classified into three groups.

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A system for measuring magnetic core noise as a function of the magnetization level

Cited by 2 publications

References 7 publications

Noise investigation of a high precision digital multimeter model HP3457A or HP3458A for microvolt level dc voltage measurements

Noise investigation of a high precision digital multimeter model HP3457A or HP3458A for microvolt level dc voltage measurements

On derivation of a thermal transfer model of a thermostat housing a heat source with several watts

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