公开(公告)号：US20140225873A1

公开(公告)日：2014-08-14

申请号：US14256450

申请日：2014-04-18

Applicant: SYNAPTICS INCORPORATED

Inventor： Jeffrey A. SMALL ,  Clyde WASHBURN

IPC: G06F3/043 ,  G06F3/041

CPC classification number: G06F3/0436 ,  G06F3/0412

Abstract: A subsystem, system and method for sensing an input object relative to a sensing region of an ultrasound sensor device are disclosed herein. In one embodiment, a subsystem for sensing an input object relative to a sensing region of an ultrasound sensor device includes a circuit, a switch coupled to an output of the circuit, and an integrating capacitor coupled to the output of the circuit. The circuit has an input for receiving a resulting signal comprising positive and negative polarities, the resulting signal having effects indicative of the input object relative to the sensing region. The integrating capacitor is also coupled to a substantially constant voltage source and to the switch. The circuit is operable to output a rectified signal to the first integrating capacitor indicative of the input object relative to a sensing region.

Abstract translation: 本文公开了一种用于感测相对于超声波传感器装置的感测区域的输入物体的子系统和系统。 在一个实施例中，用于感测相对于超声传感器装置的感测区域的输入物体的子系统包括电路，耦合到电路的输出的开关以及耦合到电路的输出的积分电容器。 电路具有用于接收包括正和负极性的结果信号的输入，所得到的信号具有指示输入对象相对于感测区域的效果。 积分电容器还耦合到基本恒定的电压源和开关。 电路可操作以将整流信号输出到指示输入物体相对于感测区域的第一积分电容器。