POWER SAVING APPARATUS OF CAPACITIVE POINTER
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United States of America Patent
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Issued Date -
Nov 10, 2016
app pub date -
Jul 17, 2015
filing date -
May 8, 2015
priority date (Note) -
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Abstract
A power saving apparatus of a capacitive pointer is disclosed. The power saving apparatus of a capacitive pointer comprises an amplifier circuit, a first comparator circuit and a second comparator circuit, a controller and a switch. The first comparator circuit provides a first voltage level and receives an amplified driving signal, and the second comparator circuit provides a second voltage level and receives the amplified driving signal, wherein the first voltage level is higher than the second voltage level. The power saving apparatus determines whether the switch is turned on or off to provide an output signal through comparing the first voltage level and the voltage level of the amplified driving signal.
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