| PN结对交流信号相位的影响(续) |
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| 引用本文： | 侯清润,张慧云,王波,纵保金,陈宜保,茅卫红,王钧炎,李文茜,曹双僖. PN结对交流信号相位的影响(续)[J]. 物理实验, 2005, 25(11): 34-36 |
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| 作者姓名： | 侯清润 张慧云 王波 纵保金 陈宜保 茅卫红 王钧炎 李文茜 曹双僖 |
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| 作者单位： | 1. 清华大学,物理系,北京,100084
2. 清华大学,工程物理系,北京,100084 |
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| 摘 要： | 当1个交流小信号被1个PN结和1个大电容分压,且该电容的电容值远大于PN结电容时,大电容两端的电压与PN结电容成正比,该信号的相位与PN结的电阻以及信号的频率有关.把PN结当作1个电容和1个电阻并联,可定性解释该信号的相位与PN结正向电阻、与加在PN结两端的直流反向偏压、在零直流偏压下与交流信号频率的关系.
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| 关 键 词： | PN结电容 PN结电阻 交流信号相位 |
| 文章编号： | 1005-4642（2005）11-0034-03 |
| 收稿时间： | 2005-01-25 |
| 修稿时间： | 2005-01-25 |
Influence of PN junction on phase change of AC signal (continued) |
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| HOU Qing-run,ZHANG Hui-yun,WANG Bo,ZONG Bao-jin,CHEN Yi-bao,MAO Wei-hong,WANG Jun-yan,LI Wen-xi,CAO Shuang-xi. Influence of PN junction on phase change of AC signal (continued)[J]. Physics Experimentation, 2005, 25(11): 34-36 |
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| Authors: | HOU Qing-run ZHANG Hui-yun WANG Bo ZONG Bao-jin CHEN Yi-bao MAO Wei-hong WANG Jun-yan LI Wen-xi CAO Shuang-xi |
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| Affiliation: | 1. Department of Physics, Tsinghua University, Beijing 100084, China; 2. Department of Engineering Physics, Tsinghua University, Beijing 100084, China |
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| Abstract: | The voltage of AC signal is divided by a PN junction and a capacitor.When the capacitance of the capacitor is far greater than that of the PN junction,the output voltage of the capacitor is proportional to the capacitance of the PN junction,and the phase of the AC signal is related not only to the resistance of the PN junction but also to the frequency of the AC signal.If the PN junction is considered as parallel connection of a capacitor and a resistance,the relationships between the phase of the AC signal and the following variables can be interpreted qualitatively: the forward resistance of the PN junction,the backward DC voltage exerted on the PN junction,and the frequency of the AC signal when the backward DC voltage is zero. |
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| Keywords: | capacitance of PN junction resistance of PN junction phase of AC signal |
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