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    CURRENT-MODE COARSE-BASELINE-CORRECTION
    1.
    发明申请
    CURRENT-MODE COARSE-BASELINE-CORRECTION 有权
    电流模式基准校正

    公开(公告)号：US20150115977A1

    公开(公告)日：2015-04-30

    申请号：US14067863

    申请日：2013-10-30

    申请人： SYNAPTICS INCORPORATED

    发明人： Eric Scott BOHANNON ,  Marshall J. BELL, JR. ,  Kirk HARGREAVES ,  Murat OZBAS ,  Jeffrey A. SMALL

    IPC分类号： G01R27/26 ,  G06F3/044 ,  G01R35/00

    CPC分类号： G01R27/2605 ,  G01R35/005 ,  G06F3/044

    摘要： The embodiments herein are generally directed to using a current-mode CBC circuit to maintain a voltage bias setting at a receiver when performing capacitive sensing. To do so, the CBC circuit may compensate for the change in voltage at a receiver by providing a current at the input of the receiver. Instead of using a passive CBC capacitor for each receiver, the input device may use a single CBC capacitor and a plurality of current mirrors to source and sink the current required to correct the input voltage at a plurality of receivers. As a result, the current-mode CBC circuit includes only one passive capacitor (or bank of capacitors) and a plurality of current mirrors which may provide space and cost benefits relative to a CBC circuit that uses a passive capacitor (or bank of capacitors) for each receiver channel.

    摘要翻译： 本文的实施例通常涉及使用电流模式CBC电路来在执行电容感测时维持接收器处的电压偏置设置。 为此，CBC电路可以通过在接收机的输入端提供电流来补偿接收机的电压变化。 代替对每个接收机使用无源CBC电容器，输入装置可以使用单个CBC电容器和多个电流镜来源和吸收在多个接收器处校正输入电压所需的电流。 结果，电流模式CBC电路仅包括一个无源电容器（或电容器组）和多个电流镜，其可以相对于使用无源电容器（或电容器组）的CBC电路提供空间和成本优势， 对于每个接收器通道。