| 利用锁定放大器测量低电阻和高电阻 |
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| 引用本文： | 曹文,张利巍,刘祥楼.利用锁定放大器测量低电阻和高电阻[J].大学物理实验,2012,25(4):36-37,41. |
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| 作者姓名： | 曹文 张利巍 刘祥楼 |
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| 作者单位： | 1. 东北石油大学,黑龙江大庆,163318
2. 黑龙江省高校校企共建测试计量技术及仪器仪表工程研发中心,黑龙江大庆,163318 |
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| 基金项目： | 国家十二五科技重大专项(2011ZX05020-006);东北石油大学2011-2012教改项目 |
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| 摘 要： | 利用锁定放大器能够测量湮没在噪声中的信号的特点,采用低频交流伏安法,在0.5Vrms和0.5mArms条件下,实现了对几十mΩ级低电阻和数百MΩ级高电阻的测量,测量误差在1%左右。
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| 关 键 词： | 低电阻 高电阻 锁定放大器 热噪声 |
The Measurements of Low Resistance and High Resistance Using Lock-in Amplifier |
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| CAO Wen
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ZHANG Li-wei
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LIU Xiang-lou.The Measurements of Low Resistance and High Resistance Using Lock-in Amplifier[J].Physical Experiment of College,2012,25(4):36-37,41. |
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| Authors: | CAO Wen ZHANG Li-wei LIU Xiang-lou |
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| Institution: | 1.Northeast Petroleum University,Heilongjiang Daqing 163318;2.The University-enterprise R & D Center of Measuring and Testing Technology & Instrument and Meter Engineering in Heilongjiang Province,Heilongjiang Daqing 163318) |
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| Abstract: | Lock-in amplifier can measure the signal lost in noise. Using this characteristic and low frequency？ AC voltammeter,in 0. 5 Vmms and 0. 5 mArms conditions. Low resistance of tens of mΩ orders of magnitude and high resistance of several hundred mΩ orders of magnitude were measured. Measurement error is about 1%. |
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| Keywords: | low resistance high resistance lock-in amplifier thermal noise |
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