| 摘要 |
<p>The present invention relates to a digitizer. More specifically, the present invention relates to a digitizer capable of rapidly outputting final coordinates and enhancing accuracy by amplifying voltage output from a loop senor through a differential amplifier as the voltage is charged and by removing noise from the amplified voltage. The digitizer according to the present invention includes: a plurality of loop sensors (110) to sense access of a stylus pen; an analog switching unit (120) to selectively switch and output sensed data from the loop sensors (110); a differential amplifying unit (130) to amplify and output power of the analog switching unit (120); a voltage charging unit (140) to charge the voltage output from the differential amplifying unit (130); an analog-digital converter (150) to analog-digital convert and output the voltage charged and output in the voltage charging unit (140); and a controller (160) to calculate coordinates sensed by the loop sensors (110) based on data output from the analog-digital converter (150).</p> |
