取样电阻就是做参考的电阻，常用在反馈电路里，拿个稳压电源的电路举例说，为了可以使输出的电压保持恒定状态，要从输出电压取一部分电压做参考（常用取样电阻的形式），如果输出高了，输入端就自动降低电压，使输出减少。
有效电阻为源电阻和反馈(或分流)取样电阻的并联组合。
The effective resistance is the parallel combination of the source resistance and the feedback (or shunt) sensing resistance.
另使用了一限流型过流保护电路来对输出电流进行限制，并通过改变电流取样电阻的大小来调节限流值的大小。
Another limiting the use of one type over-current protection circuit to limit output current, and by changing the size of the current sampling resistor to regulate the size of current-limiting value.
用夹钳装置2381和一个微欧计的帮助，测试电缆的欧姆电阻和材料的取样以束或条的形式能被测量。
With the help of the clamping device type 2381 and a microhmmeter, the ohmic resistances of test cables and samples of materials in the shape of cords or strips can be measured.
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