Sensitivity of the dual-carrier scheme for the contact-free detection of current noise

Author

Hasiguchi, Sumihisa

Author_Institution

Dept. of Electron., Yamanashi Univ., Kofu, Japan

Volume

38

Issue

2

fYear

1989

fDate

4/1/1989 12:00:00 AM

Firstpage

434

Lastpage

437

Abstract

A configuration for the detection of current noise is proposed. in which no electrical contacts to the sample under measurement are necessary. The threshold sensitivity of the detection of the current fluctuation can be considerably improved by applying the correlation technique to obtain the spectrum of the fluctuations to be measured. It was demonstrated that a relative conductance fluctuation as low as 10 ^-6 is detectable with the proposed configuration. The most significant limiting factor to the sensitivity is the fluctuation of the ambient temperature, which must be suppressed to a level less than 0.1 K-rms/1 Hz at 1 Hz

Keywords

correlation methods; electric admittance measurement; electric noise measurement; ambient temperature; contact-free detection; correlation; current fluctuation; current noise; dual-carrier scheme; threshold sensitivity; Coils; Conductivity measurement; Contacts; Current measurement; Electric variables measurement; Fluctuations; Magnetic flux; Noise measurement; Rectifiers; Semiconductor device noise;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.192321

Filename

192321