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