| 微弱信号的双锁相检测电路研究 |
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| 引用本文： | 任小玲,许世军.微弱信号的双锁相检测电路研究[J].西安工程科技学院学报,2002,16(4):322-325. |
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| 作者姓名： | 任小玲 许世军 |
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| 作者单位： | [1]西安工程科技学院信息控制系，陕西西安710048 [2]西安工业学院数理系，陕西西安710032 |
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| 基金项目： | 兵器工业部科研基金资助项目 ( 2 2 96 82 -3) |
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| 摘 要： | 在薄膜厚度监控系统的光电检测中，针对信号特征，提出了微弱信号的双锁相检测思想，并研制了一套多级放大器和双锁相放大器。其输出信噪比≥500，静态漂移率≤7％h。膜厚监控测试实验肯定了该思想和电路设计。
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| 关 键 词： | 检测电路 锁相放大器 信噪比 漂移率 光电检测器 |
| 文章编号： | 1671-850X(2002)04-0322-04 |
| 修稿时间： | 2002年9月17日 |
Investigation on dual-lock-phase detection circuit to faint signal |
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| REN Xiao-ling ,XU Shi-jun.Investigation on dual-lock-phase detection circuit to faint signal[J].Journal of Xi an University of Engineering Science and Technology,2002,16(4):322-325. |
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| Authors: | REN Xiao-ling XU Shi-jun |
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| Institution: | REN Xiao-ling 1,XU Shi-jun 2 |
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| Abstract: | In the optoelectronic detection of thin-film thickness monitoring control system, based on the characteristics of quar-optical path, an idea of dual-lock-phase detection to faint signal is proposed, the multi-stage amplifier and the dual-lock-phase amplifier are developed. The signal-to-noise ratios of two output signals are equal to or more than 500, the static drift ratios are equal to or less than 7%/h. The experiments of monitoring thin-film thickness show that the idea and the design are reasonable. |
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| Keywords: | quar-optical path lock-phase amplifier signal-to-noise ratio drift ratio |
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