发明名称 |
Receive demodulator for capacitive sensing |
摘要 |
A first integration capacitor stores charge from a positive signal portion. A second integration capacitor stores charge from negative signal portion. The voltage across the first and second integration capacitors is measured differentially. The presence of a conductive object proximate to a capacitance sensing element is detected based on the measured differential voltage between the first and second integration capacitors. |
申请公布号 |
US8575947(B1) |
申请公布日期 |
2013.11.05 |
申请号 |
US201313739991 |
申请日期 |
2013.01.11 |
申请人 |
WALSH PAUL;ZHANG ZHEYAO;KREMIN VIKTOR;CYPRESS SEMICONDUCTOR CORPORATION |
发明人 |
WALSH PAUL;ZHANG ZHEYAO;KREMIN VIKTOR |
分类号 |
G01R27/26 |
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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