发明名称 |
CAPACITANCE MEASUREMENT CIRCUIT, SENSOR SYSTEM AND METHOD FOR MEASURING A CAPACITANCE USING A SINUSOIDAL VOLTAGE SIGNAL |
摘要 |
A capacity measuring circuit includes a measuring voltage source configured to feed a sinusoidal voltage signal to a first terminal of a capacity to be measured so as to cause a temporal change in a charge stored on the capacity to be measured. The capacity measuring circuit additionally includes a delta-sigma modulator. The delta-sigma modulator is configured to receive a charge from a second terminal of the capacity to be measured and to provide a digital output signal which is dependent on a quantity of the charge received from the capacity to be measured. The capacity measuring circuit may be employed in a sensor system. |
申请公布号 |
EP2603977(A1) |
申请公布日期 |
2013.06.19 |
申请号 |
EP20110743507 |
申请日期 |
2011.08.05 |
申请人 |
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN WISSENSCHAFT E.V. |
发明人 |
MOEDL, STEFAN;HAUER, JOHANN;SAUERER, JOSEF |
分类号 |
G01D5/24;G01R27/26;H03M3/00 |
主分类号 |
G01D5/24 |
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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