公开(公告)号：US20140210482A1

公开(公告)日：2014-07-31

申请号：US13752314

申请日：2013-01-28

Applicant: QUALCOMM INCORPORATED

Inventor： Baiying Yu ,  Brett C. Walker

IPC: G01R31/36

CPC classification number: G01R31/3835 ,  G01R19/0084 ,  H01M10/48 ,  H03F3/005 ,  H03F2200/261 ,  H03F2200/375 ,  H03F2200/411

Abstract: A method and apparatus that reduce common mode variations experienced by a voltage sensing component. A measurement component such as a BATFET or an external sensing resistor, receives, at its source, a voltage from the top of a battery having a voltage VPH_PWR. A voltage sensing component, such as an ADC, is powered by the voltage from the battery. A power referenced component, such as a power referenced LDO, tracks the voltage from the battery and outputs the tracked voltage minus a predetermined voltage amount to a negative side of the voltage sensing component.

Abstract translation: 一种降低电压感测部件所经受的共模变化的方法和装置。 诸如BATFET或外部检测电阻器的测量部件在其源极处接收来自具有电压VPH_PWR的电池的顶部的电压。 诸如ADC的电压感测部件由电池的电压供电。 诸如功率参考LDO的功率参考分量跟踪来自电池的电压，并将跟踪的电压减去预定电压量输出到电压感测组件的负侧。