CAJ | 학술논문

该文设计了一款PIN光电探测器的低噪声前置放大电路,选用低噪声器件,设计带通滤波电路,实现阻抗匹配,消除噪声。该电路由＋15V和±5V三电源驱动,照射激光波长λ=850nm,光脉冲频率f=10kHz,光脉冲宽度τ=20ns。通过软件仿真及实物测试,达到响应度Re（V/W）≥2×10^5,上升时间Tr（ns）≤13,暗噪声电压峰峰值VN（mV）≤10,闭环增益A（dB）≥60等指标,表明该文方法可以为低噪声前置放大电路设计提供指导。
해문설계료일관PIN광전탐측기적저조성전치방대전로,선용저조성기건,설계대통려파전로,실현조항필배,소제조성。해전로유＋15V화±5V삼전원구동,조사격광파장λ=850nm,광맥충빈솔f=10kHz,광맥충관도τ=20ns。통과연건방진급실물측시,체도향응도Re（V/W）≥2×10^5,상승시간Tr（ns）≤13,암조성전압봉봉치VN（mV）≤10,폐배증익A（dB）≥60등지표,표명해문방법가이위저조성전치방대전로설계제공지도。
This paper design a low-noise photodetector preamplifier,select low-noise devices,design bandpass filter,achieve impedance match and eliminate the noise.The circuit is driven by the positive 15V、positive and negative 5V power supply,the wavelength of irradiation laser is 850nm,the pulse frequency is 10kHz,the pulse width is 20ns.By software simulation and physical testing,We get responsivity ≥2×10^5V/W,rise time≤13ns,noise voltage pk-pk≤10mV under dark background,closed-loop gain≥60dB,which indicate the method used in this paper could provide direction for the low-noise preamplifier circuit design.