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Volume 43 Issue 5
May  2021
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YAN Jingchun, FU Shuai, SU Haohang, RONG Peng, SHEN Yiwei. Design of Multi-channel High Precision Data Acquisition System Based on nA Level Current Signal[J]. Infrared Technology , 2021, 43(5): 417-421.
Citation: YAN Jingchun, FU Shuai, SU Haohang, RONG Peng, SHEN Yiwei. Design of Multi-channel High Precision Data Acquisition System Based on nA Level Current Signal[J]. Infrared Technology , 2021, 43(5): 417-421.
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Design of Multi-channel High Precision Data Acquisition System Based on nA Level Current Signal

  • Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China

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  • Received Date: August 25, 2020
  • Revised Date: December 24, 2020
    Graphical Abstract
    • Abstract
  • In the Fourier transform spectrum detection technology of atmospheric composition and content detection, the output current signal of infrared detector is generally very weak. In this paper, a multi-channel weak current signal high-precision acquisition circuit is designed by analyzing the source of system noise, using high-precision and low-noise integrated operational amplifier, and reasonably selecting circuit parameters. An analysis of the circuit performance shows that the system can accurately acquire the nA level 1kHz current signal, and meet the requirements of weak signal detection.
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    • References (10)
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