传感技术学报2011，Vol.24Issue(9)：1301-1304,4.DOI:10.3969/j.issn.1004-1699.2011.09.015
差分电容电压转换电路噪声性能分析及测试
Performance Analysis and Test of Noise in Differential Capacitance to Voltage Conversion Circuit
张霞 1胡世昌 2朱辉杰2
作者信息
- 1. 西安邮电学院电子信息工程学院,西安710100
- 2. 浙江大学信息与电子工程学系,杭州310027
- 折叠
摘要
Abstract
This paper presents an equivalent noise model of differential capacitance to voltage conversion circuit which is widely used in capacitive sensing accelerometers. The noise floors of the capacitance to voltage conversion circuit realized by dual amplifiers (two in a package) and the instrumentation amplifier are measured. The common-mode noise and the difference-mode noise in the noise floor of the capacitance to voltage conversion circuit can be calculated. The test results show that the difference-mode noise, which would affect the resolution of the capacitive sensing accelerometer system, constitutes nearly half the noise floor of the capacitance to voltage conversion circuit.关键词
差分电容电压转换电路/共模噪声/差模噪声Key words
differential capacitance to voltage conversion circuit/ common-mode noise/ difference-mode noise分类
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张霞,胡世昌,朱辉杰..差分电容电压转换电路噪声性能分析及测试[J].传感技术学报,2011,24(9):1301-1304,4.
