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    Capacitance-to-voltage modulation circuit
    1.
    发明授权
    Capacitance-to-voltage modulation circuit 有权

    公开(公告)号：US10353511B2

    公开(公告)日：2019-07-16

    申请号：US15271131

    申请日：2016-09-20

    Applicant: QUALCOMM Incorporated

    Inventor： Bo-Ren Wang ,  Lennart Mathe ,  Sameer Wadhwa ,  Nathan Altman ,  Sandeep D'Souza

    IPC: G06F3/041 ,  G06F3/044 ,  G06K9/00 ,  H03K17/955 ,  H03K17/96

    Abstract: The present disclosure describes aspects of a capacitance-to-voltage modulation circuit. In some aspects, the circuit is used in touch sensing. In some aspects, a modulation circuit comprises a first pair of switches having one switch connected between a voltage source and a capacitor, and another switch connected between ground and the input of the circuit. The circuit also includes a second pair of switches having one switch connected between the voltage source and the input of the circuit, and another switch connected between ground and the capacitor. A third pair of the circuit's switches comprise one switch connected between the capacitor and an input of an analog-to-digital converter (ADC) and another switch connected between the input of the circuit and the input of the ADC. The third pair of switches may enable charge sharing of signals modulated by the first and second pairs of switches, a result of which can be used to sense touch input based on capacitance at the input of the circuit.

    Gradual Power Wake-Up Mechanism
    2.
    发明申请
    Gradual Power Wake-Up Mechanism 审中-公开
    渐进电源唤醒机制

    公开(公告)号：US20170075700A1

    公开(公告)日：2017-03-16

    申请号：US15260132

    申请日：2016-09-08

    Applicant: QUALCOMM Incorporated

    Inventor： Yizhaq Abudi ,  Meir Agassy ,  Arye Lerner ,  Nathan Altman ,  Sandeep D'Souza

    IPC: G06F9/44 ,  G06K9/00

    CPC classification number: G06F9/4418 ,  G06F1/3206 ,  G06F3/043 ,  G06F3/0484 ,  G06F3/04883 ,  G06F9/4406 ,  G06F21/32 ,  G06K9/0002 ,  G06K9/00087 ,  H04M2250/22

    Abstract: Apparatuses and methods of a gradual power wake-up mechanism are disclosed. In one embodiment, a method of activating a device based on detection of a fingerprint image may include monitoring a first metric level of a first set of regions of the fingerprint image, determining a second metric level of a second set of regions of the fingerprint image in response to the first metric level exceeding a first threshold, and activating the device based on the second metric level of the second set of regions of the fingerprint image.

    Abstract translation: 公开了逐步功率唤醒机构的装置和方法。 在一个实施例中，基于对指纹图像的检测来激活设备的方法可以包括监视指纹图像的第一组区域的第一度量级别，确定指纹图像的第二组区域的第二度量级别 响应于所述第一度量水平超过第一阈值，以及基于所述指纹图像的所述第二组区域的所述第二度量水平来激活所述设备。

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