发明名称 |
Touch sense interface circuit |
摘要 |
A touch sensing interface (101) includes a noise touch sensing circuit (110) that utilizes electromagnetic (EM) noise in a touch panel (102) to determine whether a pad of the touch panel is touched, such as by a finger of a user. The noise touch sensing circuit detects noise in a first pad (104) and in a second pad (105) of the touch panel, compares power of the noise in the first pad to power of noise in the second pad, and outputs a signal (132) indicative of the first pad being touched when power of noise in the first pad exceeds power of noise in the second pad by a pre-selected amount. The touch sensing interface may include a capacitive touch sensing circuit (120) and a controller (130) that selectively actuates the noise touch sensing circuit and the capacitive touch sensing circuit. |
申请公布号 |
US8599169(B2) |
申请公布日期 |
2013.12.03 |
申请号 |
US201113325747 |
申请日期 |
2011.12.14 |
申请人 |
NASCIMENTO IVAN CARLOS RIBEIRO;FREESCALE SEMICONDUCTOR, INC. |
发明人 |
NASCIMENTO IVAN CARLOS RIBEIRO |
分类号 |
G06F3/045 |
主分类号 |
G06F3/045 |
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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