发明名称 |
Method and circuit for detecting movements through micro-electric-mechanical sensors, compensating parasitic capacitances and spurious movements |
摘要 |
Method for detecting movements through a micro-electric-mechanical sensor, having a fixed body and a moving mass, forming at least one first and one second detection capacitor, connected to a common node and to a first, respectively a second detection node and having a common detection capacitance at rest and a capacitive unbalance in case of a movement. The method includes the steps of: feeding the common node with a constant detection voltage of predetermined duration; generating a feedback voltage to maintain the first and the second detection node at a constant common mode voltage; generating a compensation electric quantity, inversely proportional to the common detection capacitance at least in one predetermined range; supplying the compensating electric quantity to the common node; and detecting an output quantity related to the capacitive unbalance.
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申请公布号 |
US2002175692(A1) |
申请公布日期 |
2002.11.28 |
申请号 |
US20020081134 |
申请日期 |
2002.02.20 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
LASALANDRA ERNESTO;UNGARETTI TOMMASO;BASCHIROTTO ANDREA |
分类号 |
G01P15/125;G01R27/26;(IPC1-7):G01R27/26 |
主分类号 |
G01P15/125 |
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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