JIANG Li-ying, YUE Bao-lei, LIANG Mao, et al. An improved weak current low noise amplifier application circuit[J]. Journal of Light Industry, 2015, 30(3-4): 118-122. doi: 10.3969/j.issn.2095-476X.2015.3/4.026
Citation:
JIANG Li-ying, YUE Bao-lei, LIANG Mao, et al. An improved weak current low noise amplifier application circuit[J]. Journal of Light Industry, 2015, 30(3-4): 118-122.
doi:
10.3969/j.issn.2095-476X.2015.3/4.026
An improved weak current low noise amplifier application circuit
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College of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
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Received Date:
2014-11-04
Available Online:
2015-09-15
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Abstract
In order to solve the problem in weak current signal detection technology that the interference of background noise,circuit noise and component noise is stronger than signal itself,a weak current low noise amplifier application circuit was designed.The model improved T-type I/V conversion circuit by adopting high precision and small resistance value feed back resistance and high performance operational amplifier AD795,set up preamplifier circuit by high performance discrete elements and designed phrase-locked amplifier circuit based on modulation and demodulation principle.The simulation analysis showed that the circuit had higher noise suppression capability and stability and could meet the weak current measurement requirement of various sensors.
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References
-
[1]
高晋占.微弱信号检测[M].2版.北京:清华大学出版社,2011:7-12.
-
[2]
刘鹏民,莫德举.T型反馈电阻网络在微弱信号放大电路中的应用[J].电测与仪表,2009,12(36):31.
-
[3]
李圣昆,郑永秋,安盼龙,等.T型反馈网络在谐振式光纤陀螺频率锁定中的应用[J].红外与激光工程,2014,43(4):1161.
-
[4]
张金利,景占荣,梁亮,等.微弱信号的调理电路设计和噪声分析[J].电子测量技术,2007,30(11):40.
-
[5]
侯跃新,周东亮,肖丹,等.传感器弱信号的放大应用电路[J].自动化技术与应用,2008,27(11):65.
-
[6]
姜利英,胡杰,陈青华,等.基于核酸适体传感器的便携式循环伏安测试系统[J].郑州轻工业学院学报:自然科学版,2014,29(2):38.
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Proportional views
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