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Proceedings Paper

Application of logarithmic analog operator with high-accuracy ratio in biochemical analyzer
Author(s): Jingfeng Wang; Zhihua Liu; Jiaxin Xiong; Yongsheng Tan
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Paper Abstract

A new analog logarithmic(Log.) operating method based on lambert-Bill's law in a biochemical analyzer is researched in this paper. We use the relationship ofthe voltage across the capacitor Log. to the time of discharging when the capacitor is discharged, change the relationship of transmittance and the concentration of a solution to the relationship of the voltage across the capacitor and the time of discharging, the concentration of the solution is gotten easily. This operator exists between pure analog and pure logic Log. operator, which avoids theory error produced by logic Log. operator fully, absorbs the merits of low cost and fast working speed of analog Log. operator, uses a large dynamic program controlled gain amplifier to improve adaptation range of input signal. thus a high operating accuracy and speed are obtained . At the same time correlate measuring experiments are done and error analyzing are produced.

Paper Details

Date Published: 12 September 2002
PDF: 4 pages
Proc. SPIE 4916, Optics in Health Care and Biomedical Optics: Diagnostics and Treatment, (12 September 2002); doi: 10.1117/12.482982
Show Author Affiliations
Jingfeng Wang, Changchun Univ. of Science and Technology (China)
Zhihua Liu, Changchun Univ. of Science and Technology (China)
Jiaxin Xiong, Changchun Univ. of Science and Technology (China)
Yongsheng Tan, Dalian 3280 Electronics Industry Co., Ltd. (China)

Published in SPIE Proceedings Vol. 4916:
Optics in Health Care and Biomedical Optics: Diagnostics and Treatment
Britton Chance; Mingzhe Chen; Gilwon Yoon, Editor(s)

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