CAJ | 학술논문

文章首先给出了光电二极管的噪声等效模型并具体分析了主要噪声来源，综合3种噪声源用均方根分析法来计算总的噪声输出，提出基于反馈电容和基于复合放大器的2个改进型电路来降低电路的噪声。计算与仿真结果表明基于反馈电容的降噪电路降低了噪声，但信号的带宽也相应降低了，而基于复合放大器的降噪电路降低了噪声且保持信号的带宽几乎不受影响。
문장수선급출료광전이겁관적조성등효모형병구체분석료주요조성래원，종합3충조성원용균방근분석법래계산총적조성수출，제출기우반궤전용화기우복합방대기적2개개진형전로래강저전로적조성。계산여방진결과표명기우반궤전용적강조전로강저료조성，단신호적대관야상응강저료，이기우복합방대기적강조전로강저료조성차보지신호적대관궤호불수영향。
The equivalent circuit models of the photodiode amplifier are introduced ,and the main noise sources are studied .Then the total output noise is analyzed by root mean square (RMS) analysis based on three kinds of noises .Finally ,two improved circuits based on feedback capacitance and composite amplifier are proposed to reduce the noise of circuit .T he calculation and simulation results show that the circuit based on feedback capacitance effectively reduces the extreme of noise gain and the band-width of the signal decreases at the same time ,and the circuit based on composite amplifier effectively reduces the extreme of noise gain while the bandwidth of the signal is hardly affected .