发明授权
- 专利标题： Differential measurements with a large common mode input voltage
- 专利标题（中）： 具有大的共模输入电压的差分测量
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申请号： US14291640申请日： 2014-05-30
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公开(公告)号： US09362874B2公开(公告)日： 2016-06-07
- 发明人: Hrvoje Jasa , Andrew M. Jordan
- 申请人： Fairchild Semiconductor Corporation
- 申请人地址： US CA San Jose
- 专利权人： FAIRCHILD SEMICONDUCTOR CORPORATION
- 当前专利权人： FAIRCHILD SEMICONDUCTOR CORPORATION
- 当前专利权人地址： US CA San Jose
- 代理机构： Schwegman Lundberg & Woessner, P.A.
- 主分类号： H03F3/45
- IPC分类号： H03F3/45 ; G01R19/00 ; G01R19/165
摘要：
An apparatus comprises a differential amplifier circuit and a current source. The differential amplifier circuit is configured to receive a voltage at an input, wherein the differential amplifier circuit generates an output voltage having a magnitude proportional to the received voltage over a voltage range to be measured at a specified output common mode voltage. The current source is electrically connected to an input of the differential amplifier circuit and is configured to subtract a midpoint of a voltage range of the battery voltage to be measured at the input of the differential amplifier, wherein a circuit supply voltage provided to the differential amplifier circuit and the current source is less than the voltage at the input.
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