首页>
外国专利>
Circuit for the high-precision determination of the arrival time of photons on individual photon-triggered avalanche diodes
Circuit for the high-precision determination of the arrival time of photons on individual photon-triggered avalanche diodes
展开▼
机译:高精度确定单个光子触发雪崩二极管上光子到达时间的电路
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▼