Patent ID: 9652107
Date: 2017-05-16
CPC Classifications: G06F

Claim:
1. A touch sensor comprising: a touch panel including driving lines and sensing lines and having node capacitors between neighboring or overlapping driving lines and sensing lines; and a sensing unit electrically connected to the sensing lines and configured to sense a capacitance from the touch panel, wherein: the sensing unit includes: an input resistor having a first terminal connected to at least one of the sensing lines; a first amplifier including a first input terminal connected to a second terminal of the input resistor, a second input terminal connected to a first power supply, and a first output terminal; a feedback resistor having a first terminal connected to the first input terminal of the first amplifier; and a feedback amplifier having an input terminal connected to the first output terminal of the first amplifier and an output terminal connected to a second terminal of the feedback resistor, and a gain of the feedback amplifier is less than 1.