1.前言电阻比的测量,有赖于上述两种方法之一:对两个或多个串联电阻施加电流,并测量这些电阻端的电压比;或对每一对电阻施加已知比率的电流,直导每个电阻器上的端电压相同。经典的 Wheatstone 电桥及 Kelvin 双电桥是运用第一种方法的实例,而直流比例比较电桥则是运用第二种方法之实例。第一种方法是借 1. Introduction Resistance ratio measurements rely on either of the two methods described above: Apply current to two or more series resistors and measure the voltage ratio at these resistor terminals; or apply a known ratio of current to each pair of resistors, direct The same terminal voltage across each resistor. The classic Wheatstone bridge and the Kelvin double bridge are examples using the first method, and the DC ratio comparison bridge is an example using the second method. The first method is to borrow