| 一种带宽直流放大器的设计 |
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| 引用本文： | 雷丹,李川香.一种带宽直流放大器的设计[J].微型机与应用,2011,30(2). |
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| 作者姓名： | 雷丹 李川香 |
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| 作者单位： | 华中科技大学武昌分校自动化系,湖北武汉,430064 |
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| 摘 要： | 设计了一种由前置放大电路、可预置增益放大电路、低通滤波电路、后级放大电路、直流稳压电路及单片机控制电路组成的带宽直流放大器.其中增益放大电路由两级可变增益宽带放大器AD603组成,增益的预置由单片机实现,滤波器采用二阶巴特沃思滤波器,而后级放大电路可将输出电压有效值放大到10 V.整个设计实现了最大电压增益AV≥60 dB,并且增益连续可调,其制作成本低、电源效率高.
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| 关 键 词： | 单片机控制 可预置增益放大 低通滤波 后级放大 |
Design of DC wideband amplifier |
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| Lei Dan,Li Chuanxiang.Design of DC wideband amplifier[J].Microcomputer & its Applications,2011,30(2). |
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| Authors: | Lei Dan Li Chuanxiang |
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| Affiliation: | Lei Dan,Li Chuanxiang (Department of Automation,Huazhong University of Science and Technology Wuchang Branch,Wuhan 430064,China) |
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| Abstract: | The design of DC wideband amplifier consists of pre-amplification,pre-gain amplification,low-pass filter,post-amplifier,the DC power module ,the MCU control and display module. Pre-gain amplification composed by two AD603 which has variable gain wideband and the gain preset by the microcontroller module. The second-order butterworth filter used as low pass filter,post-amplifier can amplify the voltage to 10 V. SCM module can adjustable preset amplifier gain continuously,and displays the preset voltage gain ... |
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| Keywords: | SCM control preset gain amplification low-pass filter after amplifier |
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