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本文介绍采用PIN管三级直耦放大电路,在输入光信号功率为50毫微瓦时输出信号电压大于200毫伏。电路的噪声系数低于2dB,可作为光纤传感器等微弱光的光电变换用。
This article describes the use of PIN tube three-stage direct-coupled amplifier circuit, the input optical signal power of 50 nano-watts output signal voltage greater than 200 millivolts. The noise figure of the circuit is less than 2dB, which can be used as photoelectric conversion of weak light such as optical fiber sensor.