题目/Title：Fully-differential low-offset interface for capacitive sensors

作者/Author：周凯敏,王自强,张春,王志华
                        Kaimin Zhou,Ziqiang Wang,Chun Zhang,Zhihua Wang

会议/Conference：APCCAS 2010

地点/Location：Kuala Lumpur, Malaysi

年份/Issue Date：2010.6-9 Dec.

页码/pages：pp. 788 - 791

摘要/Abstract：
A novel fully-differential capacitor measuring circuit is presented in this paper. Baseline drift is reduced by using a reference branch and the offsets of two op-amps are cancelled by each other. The simulation results show that linearity of this measuring circuit achieves 99.98%, baseline drift reduces to 4mV and sensitivity error between simulated result and theoretical calculated result is below 3%.