公开(公告)号：US20170322645A1

公开(公告)日：2017-11-09

申请号：US15145819

申请日：2016-05-04

申请人： Ting-Kuo Kao ,  Hsin Hsueh Wu ,  Chien-Pang Lin

发明人： Ting-Kuo Kao ,  Hsin Hsueh Wu ,  Chien-Pang Lin

IPC分类号： G06F3/0354 ,  G06F3/044 ,  G06F3/038

CPC分类号： G06F3/03545 ,  G06F3/0383 ,  G06F3/0418 ,  G06F3/044

摘要： Embodiments of a circuit and a stylus for interacting with a capacitive sensor are disclosed. The stylus includes a stylus body, a circuit disposed within the stylus body, a tip, and a power source. The circuit includes an input terminal, an amplifier, and an output terminal. The tip includes a sensing electrode and an emitting electrode, and the tip is disposed on a proximal end of the stylus body. The power source is electrically coupled to the circuit. The input terminal of the circuit is electrically coupled to the sensing electrode of the tip, and the output terminal of the circuit is electrically coupled to the emitting electrode of the tip. The circuit receives a signal through the sensing electrode, amplifies and inverts the signal, and outputs the signal through the emitting electrode. The amplifier of the circuit amplifies only a portion of the signal that exceeds a threshold voltage.