摘要
论述了微小电阻测量的两种方法,总结了测量采用的四个关键技术:精密恒流源、高性能测量放大器、四引线法、高精度A/D转换器。测试结果表明,采用该技术的测量电路输入阻抗高,消除了试样接触电阻的影响,可对微小电阻进行精确的测量。
Two ways to measure micro resistance were discuss ed. The key measuring technologies, ineluding high stable constant current power source, high capability gain amplifier, four probe method, and high precision A /D converter, were summarized. The results indicate that the measurement circuit using this technology has a high impedance so can be used to measure low resist ance accurately.
出处
《物理测试》
CAS
2005年第1期34-36,共3页
Physics Examination and Testing
