| 摘要 |
Disclosed is a touch sensing circuit capable of adjusting a reception frequency band, by which a reception frequency bandwidth of a driving signal, which is applied from a driving electrode of a touch screen panel and transferred to a reception electrode of the touch screen panel, can be adjusted. The touch sensing circuit is able to adjust a reception frequency bandwidth of a driving signal, which is applied from a driving electrode of a touch screen panel and transferred to a reception electrode of the touch screen panel, by using a high pass filter and a low pass filter implemented by a differentiator and an integrator. The present invention is able to selectively receive a driving signal for each frequency by adjusting resistance values of a plurality of embedded resistors and a capacitance of a capacitor and to amplify the received driving signal at a predetermined amplitude. Therefore, since a separate filter for removing a noise component included in a driving signal is unnecessary, a system can be simplified. |
