文章基本信息

标题：PERFORMANCE COMPARISONS OF INTERFACE CIRCUITS FOR MEASURING CAPACITANCES
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作者：PRABHU RAMANATHAN ; MARIMUTHU.R ; R. SARJILA 等
期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2012
卷号：39
期号：1
页码：001-005
出版社：Journal of Theoretical and Applied
摘要：This paper reviews some of the recent signal conditioning and Interface circuits for the capacitive type sensors. This paper gives the brief idea of advantages and limitations of interface circuits for the various capacitive sensors. The sensor output may be either current or voltage but it has to be converted to the desired output range only by the signal conditioning circuit. Signal conditioning circuits provides the analog output in the desired range; this can be converted to digital through Analog to Digital converter. The signal conditioning circuit should able to produce not only the convenient of output voltage or current levels but it has to provide the isolation, impedance matching, linearization with the input, proper gain adjustment with the amplification, filtering of unwanted signals, etc. Here we reviewed the four different methodologies of the proposed signal conditioning and interfacing circuits with its advantageous and limitations.
关键词：Signal Conditioning; Interfacing Circuits; Capacitance to Digital Converter; Sigma Delta Modulator; Capacitive Sensors; and Capacitance Measurement.