| 程控增益低噪声宽带直流放大器的设计 |
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| 引用本文： | 孙科学,卜新华,唐珂.程控增益低噪声宽带直流放大器的设计[J].现代电子技术,2012,35(3):188-190. |
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| 作者姓名： | 孙科学 卜新华 唐珂 |
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| 作者单位： | 1. 南京邮电大学电子科学与工程学院,江苏南京,210046
2. 石家庄邮电职业技术学院电信工程系,河北石家庄,050021 |
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| 基金项目： | 南京邮电大学青蓝计划(NY210036)资助项目;教改项目(JG003311JX26)资助 |
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| 摘 要： | 介绍了程控增益低噪声宽带直流放大器的设计原理及流程。采用低噪声增益可程控集成运算放大器AD603和高频三极管2N2219和2N2905等器件设计了程控增益低噪声宽带直流放大器,实现了输入电压有效值小于10mV,输出信号有效值最大可达10V,通频带为0～8MHz,增益可在0～50dB之间5dB的步进进行控制,最高增益达到53dB,且宽带内增益起伏远小于1dB的两级宽带直流低噪声放大器的设计。
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| 关 键 词： | 低噪声 程控增益 功率放大 宽带直流放大器 |
Design of low noise programmable gain wide-band DC amplifier |
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| SUN Ke-xue
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BU Xin-hua
,
TANG Ke.Design of low noise programmable gain wide-band DC amplifier[J].Modern Electronic Technique,2012,35(3):188-190. |
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| Authors: | SUN Ke-xue BU Xin-hua TANG Ke |
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| Affiliation: | 1(1.College of Electronics Science and Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210046,China; 2.Telecommunications Engineering Department,Shijiazhuang Posts and Telecommunications Technology Vocational College,Shijiazhuang 050021,China) |
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| Abstract: | The design philosophy and flow of low noise programmable gain wide-band DC amplifier are presented.The fabricated low noise amplifier was cascaded with low noise integrated programmable gain op-amp AD603 and high-frequency transistor 2N2219 and 2N2905 and other devices.The input voltage is less than 10 mV,the output signal is 10 V,pass band is 0～8 MHz,the maximum gain is 53 dB,and the gain in 0～50 dB,5 dB step can be controlled by the microcontroller.In addition,fluctuation in gain and bandwidth is less than 1dB of the two level wide-band low-noise DC amplifier. |
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| Keywords: | low noise programmable gain power amplifier wide-band DC amplifier |
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