| 摘要 |
A preferred embodiment of a touch sensing apparatus includes a plurality of sensing units ( 10 ), and a plurality of grounding lines ( 205 ). Each sensing unit includes an antenna ( 201 ), a controlling circuit, a detector ( 203 ), and a feedback line ( 204 ). The antenna is for receiving a noise of a user's finger. The controlling circuit preferably includes a diode ( 2021 ) and a capacitor ( 2022 ). The diode is for filtering out a static electrical signal of the user's finger and attenuating the noise, and the capacitor( 2022 ) is for attenuating the noise from the diode. The detector is for converting the noise into a digital signal, and transmitting the digital signal to an MCU (Microprogrammed Control Unit) ( 206 ). The feedback line forms a positive feedback circuit with the antenna, thereby improving the accuracy of sensitivity of the sensing unit. The grounding lines are for insulating the sensing units.
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