发明名称 |
Object sensing |
摘要 |
An electric field object sensing system uses a charge pumping circuit to provide a voltage over a capacitor that varies dependent upon the capacitive coupling between a transmitter electrode and a receiver electrode. The output of the charge pump is preferably fed to a high impedance read-out means, such as an analog-digital converter (ADC). The system is preferably implemented in CMOS and integrated in control circuits of electronic products.
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申请公布号 |
US7560938(B2) |
申请公布日期 |
2009.07.14 |
申请号 |
US20040555847 |
申请日期 |
2004.04.28 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
VAN BERKEL CORNELIS;HOSKINS ASHER J.;GEORGE DAVID S. |
分类号 |
G01R27/26;G06F1/16;G06F3/033;H03K17/955 |
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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