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天秤座(09/24-10/23)非洲菊;火鹤花;海芋[自由;爽朗]
Abstract： This paper introduces a kind of design method of time-to-digital conversion circuit system with high precision based on SOPC technology. The time-to-digital conversion circuit module of TDC in this circuit system gets the implementation of time measurement circuit module of the bination technology of coarse time and fine tuning time by FPGA. The measuring time precision is up to the level of ns. The embedded Linux operating system after the transplantation and cutting is used to gather， save and manage the photon arrival time data in TDC circuit module， and ensure that the whole system can achieve the high precision of the acquisition， processing and storage of photon arrival time data. Then， directly seeing the work situation of TDC by the display terminal and the normal work of the whole system.