A study of a high-resolution linear circuit for capacitive sensors

被引：12
|
作者：
Karlsson, N [1 ]
机构：
[1] Swedish Def Res Estab, Div Sensor Technol, SE-58111 Linkoping, Sweden
来源：
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 1999年 / 48卷 / 06期
关键词：
capacitive sensor; femtofarads (fF); linear circuit; low-capacitance measurement; offset compensation;
D O I：
10.1109/19.816125
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A circuit for capacitance measurements is described. The circuit permits offset capacitance compensation using a de voltage. The electronic circuitry with its testing is described. The output voltage is a linear function of the capacitance measured. Experimental data show good agreement with values predicted by the linear formula. Experiments show it is possible to measure capacitance changes with a resolution of a few femtofarads (fF).
引用
收藏
页码：1122 / 1124
页数：3
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