Design of a photoelectric conversion system for pulse laser fuze
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摘要: 为了应对脉冲激光引信回波信号弱、脉宽窄的特性,获得目标尽量多的不失真信息,对光电探测器的特性和放大电路的带宽进行了分析,设计了一套实用的光电转换系统,包括PIN探测电路、前置放大电路和主放大电路。经过TINA和MULTISIM软件模拟仿真和实验验证,设计的光电转换系统的带宽为61.089MHz,增益为72.14dB。结果表明,该系统对于脉宽为十几纳秒的回波脉冲信号进行了很好的低噪声、不失真放大,满足了设计要求,回波信号经光电转换系统后输出的信号与应用需要相匹配,为激光引信的后续信号处理提供了稳定可靠的信号。Abstract: For responding to the weak signal and narrow pulse width feature of echo signals in pulse laser fuze and getting enough no distortion information of objectives,the feature of photodiode detector and the bandwidth of amplifier circuit were analyzed,and then an practical photoelectric conversion system was designed,including the PIN detector circuit,pre-amplifier circuit and main amplifier circuit.Through the actual experiments and simulation with the TINA and MULTISIM softwares,the bandwidth was 61.089MHz and the gain was 72.14dB.The result shows that the echo signal with pulse width more than 10ns was amplified with low noise and no distortion,which meets the designed requirements.The processed signals match the need of the following control system.
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