High Bandwidth Signal Modulation Technique for Micro Current Signal

YAN Ming; LI Gang; GUO Ming-an; YANG Shao-hua; LI Bin-kang

doi:10.3969/j.issn.0372-2112.2017.09.033

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High Bandwidth Signal Modulation Technique for Micro Current Signal

更新时间：2025-07-16

- High Bandwidth Signal Modulation Technique for Micro Current Signal
- Acta Electronica Sinica Vol. 45, Issue 9, Pages: 2292-2295(2017)
- 作者机构：
  
  西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室,陕西,西安,710024
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2017.09.033
  CLC： TN911.71
- Published Online：25 September 2017，
  
  Published：2017
- 稿件说明：
移动端阅览
YAN Ming, LI Gang, GUO Ming-an, et al. High Bandwidth Signal Modulation Technique for Micro Current Signal[J]. Acta Electronica Sinica, 2017, 45(9): 2292-2295.
DOI：

YAN Ming, LI Gang, GUO Ming-an, et al. High Bandwidth Signal Modulation Technique for Micro Current Signal[J]. Acta Electronica Sinica, 2017, 45(9): 2292-2295. DOI： 10.3969/j.issn.0372-2112.2017.09.033.

摘要

为实现对电流型快响应探测器微弱信号的高速探测和处理，给出了一种微电流信号的高带宽调理方法.分析了几种PIN光电探测器输出信号的频带和幅度特征；以脉宽50ns、电流范围20nA~0.1mA的微电流信号为设计目标，给出了微电流信号的调理方法和设计分析，设计并实现了针对该目标信号的高带宽调理电路；进行了性能对比测试实验，通过与光电倍增管PMT9215B进行输出响应对比，结果表明该调理电路对脉宽40ns的脉冲信号响应良好，响应波形的上升沿和半高宽约10ns，调理电路的信号带宽约35MHz，信号调理的带宽和幅度达到了量化采样要求，验证了该方法的正确性和可行性；应用该调理电路进行了432 PIN二维阵列光电探测系统的设计实现，系统动态范围约56dB，时间响应特性良好.

Abstract

A high bandwidth signal modulation method is proposed for fast response detector signal acquisition.Several PIN photoelectron detectors are analyzed as an example of fast response detector.According to the analysis results

a signal modulation framework is given

and an experimental circuit is designed and implemented according to the modulation method.A typical signal which has 50ns pulse width and 20nA~0.1mA current is tested using this circuit.PMT9215B is tested under the same condition as a comparison.Experimental result shows that the designed circuit has a very good response to a 40ns width signal

and the impulse response has a lead edge about 10ns.The signal bandwidth of the designed circuit is about 35MHz.A 2-dimensional array detector with 432 PIN diodes is designed using the proposed technique.The system has a dynamical range of 56dB

and good response to fast light signal which proves the correctness and practice of the signal modulation method.

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