| 微波检波信号增益自动控制方法研究与实现 |
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| 引用本文： | 李周利,赵学敏,黄天录.微波检波信号增益自动控制方法研究与实现[J].现代电子技术,2011,34(19):75-77,80. |
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| 作者姓名： | 李周利 赵学敏 黄天录 |
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| 作者单位： | 1. 西安石油大学电子工程学院,陕西西安,710065
2. 西安通信学院基础部,陕西西安,710106 |
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| 摘 要： | 在智能微波开关信号解调电路中采用了三级程控放大电路,各级放大电路的增益由多路SPI数字电位器MCP4351控制。测量电路对灵敏度调节电位器输出电压进行测量,在保证各级输出不失真的情况下,根据约束条件分配测量结果所对应的总增益,并形成增益分配表。其中,第二、三级增益按照线性法分配,第一级增益按照约束方程计算得出。解调时,系统控制核心MSP430F149查增益分配表得到数字电位器的调整值,并按照调整值调节电位器的阻值,实现增益的自动控制。该方法不需要单片机进行大量复杂的增益计算过程,节省运行时间和程序存储空间。
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| 关 键 词： | 解调 自动增益控制 数字电位器 程控放大电路 |
Study and Realization of Auto-gain Control Method for Microwave Detection Signal |
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| LI Zhou-li,ZHAO Xue-min,HUANG Tian-lu.Study and Realization of Auto-gain Control Method for Microwave Detection Signal[J].Modern Electronic Technique,2011,34(19):75-77,80. |
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| Authors: | LI Zhou-li ZHAO Xue-min HUANG Tian-lu |
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| Institution: | LI Zhou-li1,ZHAO Xue-min1,HUANG Tian-lu2(1.School of Electronic Engineering,Xi'an Shiyou University,Xi'an 710065,China,2.Xi'an Communications Institute,Xi'an 710106,China) |
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| Abstract: | Three-stage programmable amplifying circuit is applied in the signal demodulation circuit of a smart microwave switch,the gain of each amplifying circuit is controlled by MCP4351 which is a multiple SPI digital potentiometer.The measurement circuit measured and got an output voltage of a potentiometer for adjusting sensitivity.According to constraint conditions,the system distributed the total gain corresponding to the voltage with no signal distortion,and formed gain distribution table.In the process,the s... |
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| Keywords: | demodulation AGC digital potentiometer programmable amplifying circuit |
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