发明名称 |
Pressure sensor with differential capacitive output |
摘要 |
A MEMS pressure sensor device (200, 400, 500, 600) is provided that can provide both a linear output with regard to external pressure, and a differential capacitance output so as to improve the signal amplitude level. These benefits are provided through use of a rotating proof mass (250, 420, 520) that generates capacitive output (283, 293) from electrodes configured at both ends of the rotating proof mass. Sensor output can then be generated using a difference between the capacitances generated from the ends of the rotating proof mass. An additional benefit of such a configuration is that the differential capacitance output changes in a more linear fashion with respect to external pressure changes than does a capacitive output from traditional MEMS pressure sensors. |
申请公布号 |
EP2703799(A1) |
申请公布日期 |
2014.03.05 |
申请号 |
EP20130179577 |
申请日期 |
2013.08.07 |
申请人 |
FREESCALE SEMICONDUCTOR, INC. |
发明人 |
MCNEIL, ANDREW C;LIN, YIZHEN |
分类号 |
G01L17/00;B60C23/00;G01L7/08;G01L9/00 |
主分类号 |
G01L17/00 |
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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