The paper discussed the method of using active large-power DC standard resistor to verify DC resistance tester and analyzed its error.
阐述了有源大功率直流标准电阻器检定直流电阻测试仪的方法，对该检定方法进行了误差分析。
Purpose: it can be used as shunt and load resistor in DC or ac circuit of electric facility and electron instrument widely.
用途：可广泛用于各种电气设备和电子仪器的直流或交流电路中作分流或负载电阻等。
The PGA consists of the differential amplifier with variable source degeneration resistor and the DC-offset correction circuit.
该可编程增益放大器采用源极反馈电阻可变的差分放大器结构，且带有直流漂移校正电路。
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