| 一种微弱信号的宽带程控高增益放大器设计 |
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| 引用本文： | 王康,胡航宇,耿东晛. 一种微弱信号的宽带程控高增益放大器设计[J]. 单片机与嵌入式系统应用, 2011, 11(1): 9-12 |
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| 作者姓名： | 王康 胡航宇 耿东晛 |
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| 作者单位： | 电子科技大学,通信与信息工程学院,成都,611731 |
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| 摘 要： | 本文设计并制作了0～15 MHz带宽的宽带放大器,放大器可放大不低于1 mV的有效值信号,增益0～80 dB预设或手动可调,最大输出电压峰峰值为42 V,在通频带范围内起伏增益1 dB左右,放大器在增益为60 dB的时候,输出噪声电压的峰-峰值为200 mV,通过单片机控制可以实现电压增益和放大器的带宽可预置并显示的功...
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| 关 键 词： | 宽带放大器 高增益 可编程 单片机 VCA810 |
Programmable High-gain Broadband Amplfier for Weak Signal |
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| Wang Kang,Hu Hangyu,Geng Dongxian. Programmable High-gain Broadband Amplfier for Weak Signal[J]. Microcontrollers & Embedded Systems, 2011, 11(1): 9-12 |
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| Authors: | Wang Kang Hu Hangyu Geng Dongxian |
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| Affiliation: | Wang Kang, Hu Hangyu, Geng Dongxian (School of Communication and Information Engineering, University of Electronic Science and Technology of China,611731 Chengdu, China) |
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| Abstract: | A programmable wideband amplifier whose bandwidth is from DC to 15 MHz is presented in this paper. This amplifier can amplify 1 mV RMS and has the gain range from 0 dB to 80 dB default or manually adjustable. The maximum output voltage of peak ＆ peak is 42 V, rise and fall within the scope of the pass band is around 1 dB. When the amplifier gain is 60 dB, the output noise voltage of the peak ＆ peak is 200 mv. Using AT89S52 mierocontroller as control core, the voltage gain and bandwidth can be presented and displayed on LCD. The system is reliable and stable with low cost and high efficiency. |
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| Keywords: | VCA810 |
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