Scan method and topology for capacitive sensing
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United States of America Patent
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May 20, 2008
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app pub date -
Sep 19, 2005
filing date -
Sep 19, 2005
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Abstract
A capacitive sensing system (100) can connect groups of capacitive sensors (112-1 to 112-N) to a common node (106) to detect change in capacitance. States of a set of capacitive sensors (112-1 to 112-N) can thus be scanned faster than approaches that scan such sensors one-by-one. Faster scanning can allow for reduced power consumption in applications that only periodically scan the set of capacitive sensors (112-1 to 112-N).
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