| 普朗克常量测定仪的改进 |
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| 引用本文： | 何长英.普朗克常量测定仪的改进[J].物理实验,2007,27(7):17-19. |
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| 作者姓名： | 何长英 |
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| 作者单位： | 武汉理工大学,物理实验中心,湖北,武汉,430070 |
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| 基金项目： | 武汉理工大学校基金自制仪器项目 |
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| 摘 要： | 对普朗克常量测定仪的电路部分进行了改造,采用由三端可调稳压器LM317和LM337组成的正负双电源电路,用运算放大器OPA128LM作为电流-电压转换器,电流测量范围可达10-8~10-14A,并总结了在实际电路设计和制作中,提高仪器精度和稳定性的方法.
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| 关 键 词： | 普朗克常量 微电流 光电管 放大电路 |
| 文章编号： | 1005-4642（2007）07-0017-03 |
| 修稿时间： | 2006-12-15 |
Improvement on apparatus of Planck constant measurement |
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| HE Chang-ying.Improvement on apparatus of Planck constant measurement[J].Physics Experimentation,2007,27(7):17-19. |
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| Authors: | HE Chang-ying |
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| Institution: | Physics Experiment Center, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | The apparatus circuit of measuring Planck constant is improved.The apparatus adopts positive-negative double power supply circuit which consists of threeterminal adjustable regulator LM317 and LM337,and uses operational amplifier OPA128LM as current-voltage transformer,the range of measuring current is 10-8 to 10-14 A.The method of increasing apparatus precision and stability in designing and making is summarized. |
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| Keywords: | Planck constant weak current photoelectric tube amplification circuit |
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