首页>
外国专利>
circuit to detect with high precision the time of arrival of photons incident on photodiode to single photon avalanche
circuit to detect with high precision the time of arrival of photons incident on photodiode to single photon avalanche
展开▼
机译:电路,用于高精度检测入射在光电二极管上的光子到达单光子雪崩的到达时间
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention concerns an output circuit for extracting the avalanche pulse produced by an avalanche photodiode for single photon detection (Single Photon Avalanche Diode, SPAD), which makes possible to detect and measure with the best possible precision the time of arrival of an incident photon on the surface of said SPAD (1). The circuit is built with a coupling network (18), connected to a terminal (200) of said SPAD (1) biased at high voltage and a comparator (16). Said network (18) is designed so that the differentiation time constant ( lambda ), introduced by said block (18), is less than the total duration (Tqa) of the avalanche current pulse (112), but longer than the risetime (Tra) of said pulse (Figure 5 and Figure 8). The circuit object of the invention has the virtue of being usable in all the circuit configurations for avalanche quenching in SPADs described in the technical and scientific literature. IMAGE
展开▼