期刊名称：International Journal of Distributed Sensor Networks
印刷版ISSN：1550-1329
电子版ISSN：1550-1477
出版年度：2018
卷号：14
期号：10
页码：1
DOI：10.1177/1550147718802772
出版社：Hindawi Publishing Corporation
摘要：This article proposed and discussed a kind of sigma-delta A/D converter for load cell signal acquisition, which uses improved charge balance technique. The traditional charge balance sigma-delta A/D converter is stable if and only if the magnitude of the input signal current is less than one half the magnitude of the reference current, which limits the accuracy improvement of load cell. This article examined the stability of an improved version of the charge balance sigma-delta A/D converter. The proposed converter can be designed to be stable for input signals as large as the reference, which is helpful to improve load cell’s measurement accuracy.
关键词：A/D converter; signal acquisition circuit; stability analysis; frequency domain analysis; load cell
