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您好,
抱歉,我没找到这类电路的参考设计,但是我认为,这个激励电流需要流过基准电阻,因为激励电流的精度不高,流过基准电阻后,这样计算输出结果时才能抵消掉激励电路的影响。另外,基准电阻的值需要使差动桥输出电压小于基准电阻的电压。