发明名称 |
HIGH RESOLUTION SIGMA DELTA MODULATOR FOR CAPACITANCE SENSOR TERMINAL DISPLACEMENT MEASUREMENT |
摘要 |
A single plate capacitance sensor includes a sensor capacitor and a reference capacitor that share common plate. A capacitance-to-digital sigma delta modulator provides separate sensor excitation and reference excitation signals to the sensor capacitor and the reference capacitor to provide high resolution detection. Programmable ratio-metric excitation voltages and adaptive excitation voltage sources can be used to enhance modulator performance. |
申请公布号 |
WO2016149130(A2) |
申请公布日期 |
2016.09.22 |
申请号 |
WO2016US22140 |
申请日期 |
2016.03.11 |
申请人 |
ROSEMOUNT INC. |
发明人 |
WANG, Rongtai;SCHULTE, John, Paul |
分类号 |
G01R27/26;G01D5/24;H03M3/02 |
主分类号 |
G01R27/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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