A Micro-Resistance Measurement Based Design Approach of Digital Micro-Ohmmeter

Abstract:

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This paper presents a novel design solution of digital micro-ohmmeter based on the micro-resistance measurements. Through the system analysis, two key factors which have impacts on the measurement accuracy are identified: constant-current source circuit and A/D converter. Therefore, we suggest a design approach to improve the common constant-current source circuit to obtain enhanced system linearity, stability, precision and robustness and use high resolution A/D converter to ensure converting accurately. The proposed design approach is assessed and demonstrates that the load disturbance can be limited to 0.05%, and the measurement precision could reach 0.2% ranging from 20mΩ to 20Ω and 1.0% below 20mΩ.

Info:

Periodical:

Edited by:

Zhijiu Ai, Xiaodong Zhang, Yun-Hae Kim and Prasad Yarlagadda

Pages:

36-42

DOI:

10.4028/www.scientific.net/AMR.339.36

Citation:

J. H. Deng et al., "A Micro-Resistance Measurement Based Design Approach of Digital Micro-Ohmmeter", Advanced Materials Research, Vol. 339, pp. 36-42, 2011

Online since:

September 2011

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$35.00

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