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2. 发明授权

US07239204B2 Current shunt instrumentation amplifier with extended bipolar input common mode range 有权
标题翻译：电流分流仪表放大器，具有扩展双极性输入共模范围
公开(公告)号：US07239204B2
公开(公告)日：2007-07-03
申请号：US11136221
申请日：2005-05-24
申请人： David A. Gammie , Edward Mullins , Jeffery B. Parfenchuck
发明人： David A. Gammie , Edward Mullins , Jeffery B. Parfenchuck
IPC分类号： H03F3/45
CPC分类号： H03F1/34 , H03F3/45475 , H03F2200/261 , H03F2200/513 , H03F2203/45418 , H03F2203/45604
摘要： An amplifier circuit includes first (7A) and second (7B) operational amplifiers connected in a parallel configuration. A first terminal (12) of a first input resistor (5) is coupled to one input of both of the first (7A) and second (7B) amplifiers. A first terminal (15) of a second input resistor (6) is coupled to another input of both of the first (7A) and second (7B) amplifiers. A differential input voltage is applied between the second terminals of the first and second input resistors. The output signals of the first (7A) and second (7B) operational amplifiers are combined to produce an output signal (11AB) representative of feedback currents produced in the first (5) and second (6) input resistors. Upper and lower common mode input voltage ranges associated with the differential input voltage extend substantially above and below the upper and lower supply voltages, respectively, of the amplifier circuit.
摘要翻译：放大器电路包括以并联配置连接的第一（7A）和第二（7B）运算放大器。第一输入电阻器（5）的第一端子（12）耦合到第一（7A）和第二（7B）放大器两者的一个输入端。第二输入电阻器（6）的第一端子（15）耦合到第一（7A）和第二（7B）放大器的另一个输入端。差分输入电压施加在第一和第二输入电阻器的第二端子之间。第一（7A）和第二（7B）运算放大器的输出信号被组合以产生代表在第一（5）和第二输入电阻器（6）中产生的反馈电流的输出信号（11AB）。与差分输入电压相关联的上，下共模输入电压范围分别大致上升和低于放大器电路的上下电源电压。

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