发明名称 |
Noise resistant capacitive sensor |
摘要 |
A switch capacitor unit for implementing a capacitive sensor includes a charging switch, a charge transfer switch, and a first switch. The charging switch is coupled between a first supply voltage and a circuit node to selectively couple a sensing capacitor to the first supply voltage through the circuit node. The charge transfer switch is coupled between the circuit node and a first terminal of a second capacitor to selectively couple the sensing capacitor through the circuit node to the second capacitor. The first switch is coupled between the circuit node and a second terminal of the second capacitor to selectively couple the second terminal to the sensing capacitor through the circuit node. |
申请公布号 |
US8436263(B2) |
申请公布日期 |
2013.05.07 |
申请号 |
US20070824249 |
申请日期 |
2007.06.29 |
申请人 |
KREMIN VIKTOR;CYPRESS SEMICONDUCTOR CORPORATION |
发明人 |
KREMIN VIKTOR |
分类号 |
G06F3/041;G06F3/044;G08C21/00 |
主分类号 |
G06F3/041 |
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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