Invention Grant
- Patent Title: Differential measurements with a large common mode input voltage
- Patent Title (中): 具有大的共模输入电压的差分测量
-
Application No.: US14291640Application Date: 2014-05-30
-
Publication No.: US09362874B2Publication Date: 2016-06-07
- Inventor: Hrvoje Jasa , Andrew M. Jordan
- Applicant: Fairchild Semiconductor Corporation
- Applicant Address: US CA San Jose
- Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
- Current Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
- Current Assignee Address: US CA San Jose
- Agency: Schwegman Lundberg & Woessner, P.A.
- Main IPC: H03F3/45
- IPC: H03F3/45 ; G01R19/00 ; G01R19/165
Abstract:
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.
Public/Granted literature
- US20150015333A1 DIFFERENTIAL MEASUREMENTS WITH A LARGE COMMON MODE INPUT VOLTAGE Public/Granted day:2015-01-15
Information query
