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1·Furthermore, the GJ-4 confocal probe uses an avalanche diode with high responsivity. Therefore, it can get better measuring signals from low-reflective surfaces.

GJ-4型测头的光电接收器件使用高响应度的雪崩光电二极管，能够对一些弱反射表面获取到较好的测量信号；

2·For maximum exceed noise ratio generated, circuit structure to match the equivalent circuit diagram of the solid-state noise diode in avalanche breakdown state has been designed.

根据固态噪声二极管在雪崩击穿状态的等效电路，设计出与之匹配的电路结构，以实现超噪比的最大输出。

3·The operation principle of a detecting circuit in which avalanche photo-diode (APD) is used as photoelectric conversion device and the every part of the circuit are presented.

简介一种以锗雪崩光电二极管(APD)为光电转换器件的探测器电路的工作原理，详细介绍电路各组成部分的设计要求和设计要点。