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引言光电检测器,无论是PIN还是APD都是电容性电流源,当其负载电阻大时,可以获得高的检测电压和好的信噪比,但付出的代价是输入回路造成高频滚降。文献)1)(2)中对高阻抗放大器和跨阻抗放大器作了比较。从接收灵敏度理论角度来说。最佳均衡的高阻抗放大器最好,使用APD跨阻抗放大器略低1dB。但是对高阻抗放大器在宽带内进行均衡,无论是从电路设计角度
Introduction Photodetectors, whether PIN or APD, are capacitive current sources that provide high detection voltage and good signal-to-noise ratio when their load resistance is large, but at the expense of high-frequency roll-off of the input loop. Literature) 1) (2) for high impedance amplifier and transimpedance amplifier are compared. From the reception sensitivity theory point of view. The best balanced high-impedance amplifier is best, using APD transimpedance amplifier slightly lower 1dB. However, the high impedance amplifier in the broadband equalization, both from the circuit design point of view