| 小信号幅度测量中的差分同步解调技术 |
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| 引用本文： | 郭延芬,蒋立平. 小信号幅度测量中的差分同步解调技术[J]. 工业仪表与自动化装置, 2002, 0(2): 41-43 |
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| 作者姓名： | 郭延芬 蒋立平 |
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| 作者单位： | 1. 东南大学无线电工程系,江苏,南京,210018
2. 南京理工大学电子工程与光电技术学院,江苏,南京,210094 |
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| 摘 要： | 本文介绍一种用于测量小信号幅度的电路，被测信号范围为微伏级到几毫伏。电路设计方法适用于将数模混合型正弦波发生器作为信号源的测量仪器。文中主要讨论两方面问题，对两个正弦波信号之差的正确解调和测量中的共模信号校正。
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| 关 键 词： | 小信号幅度测量 同步解调 采样保持电路 |
| 文章编号： | 1000-0682(2002)02-0041-03 |
| 修稿时间： | 2001-01-20 |
A differential synchronous demodulation technique for small-signal amplitude measurement |
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| GUO Yan fen ,JIANG Li ping. A differential synchronous demodulation technique for small-signal amplitude measurement[J]. Industrial Instrumentation & Automation, 2002, 0(2): 41-43 |
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| Authors: | GUO Yan fen JIANG Li ping |
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| Affiliation: | GUO Yan fen 1,JIANG Li ping 2 |
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| Abstract: | This paper presents a circuit for measuring the amplitude of small signals in a range from microvolts to some dozens of millivolts.The design method of the circuit is applicable to some measuring instruments where a hybrid D/A sinewave generator is used as a signal source.The paper is focused on two points for discussion,i.e. the accurate demodulation of the difference of two sinewave signals and the common mode correction of meassurement. |
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| Keywords: | Synchronous demodulation Sampling hold circuit Amplitude measurement |
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