发明名称 FRONT-END SIGNAL COMPENSATION
摘要 A touch surface device having improved sensitivity and dynamic range is disclosed. In one embodiment, the touch surface device includes a touch-sensitive panel having at least one sense node for providing an output signal indicative of a touch or no-touch condition on the panel; a compensation circuit, coupled to the at least one sense node, for generating a compensation signal that when summed with the output signal removes an undesired portion of the output signal so as to generated a compensated output signal; and an amplifier having an inverting input coupled to the output of the compensation circuit and a non-inverting input coupled to a known reference voltage.
申请公布号 WO2008085419(A1) 申请公布日期 2008.07.17
申请号 WO2007US26187 申请日期 2007.12.21
申请人 APPLE INC.;HOTELLING, STEVE;LAND, BRIAN, RICHARDS 发明人 HOTELLING, STEVE;LAND, BRIAN, RICHARDS
分类号 G06F3/041 主分类号 G06F3/041
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