集成电路与嵌入式系统2025，Vol.25Issue(9)：71-81,11.DOI:10.20193/j.ices2097-4191.2025.0036
基于TDC反馈的CT探测器时钟同步技术
Clock synchronization technology for CT detectors based on TDC feedback
摘要
Abstract
To improve the clock synchronization performance of the CT detector,this study proposes a clock synchronization method uti-lizing a Time-to-Digital Converter(TDC)feedback mechanism and presents a complete prototype architecture of the synchronization system.For the first time,the TDC delay measurement technique based on carry chains is introduced into the clock synchronization scenario of CT detectors.A high-resolution delay measurement module is designed,incorporating multi-level comparators and high-precision delay elements to implement the timing scheduling logic.A finite state machine is employed to control the synchronization process,forming a closed-loop feedback synchronization mechanism.Simulation experiments demonstrate that in a complex scenario with 512 channels and a maximum transmission distance of 1.28 m,the system's synchronization precision remains consistently stable within 10 ps.This represents a remarkable two-order-of-magnitude improvement compared to conventional solutions.Furthermore,the system can effec-tively apply dynamic compensation to maintain the 10 ps synchronization precision even in the presence of interference-induced jitter.These advancements significantly elevate the precision and reliability of clock synchronization in CT detector systems.关键词
CT探测器/时钟同步/TDC/延时分辨率/FPGAKey words
CT detector/clock synchronization/TDC/delay resolution/FPGA分类
信息技术与安全科学引用本文复制引用
胡金辉,于晓东..基于TDC反馈的CT探测器时钟同步技术[J].集成电路与嵌入式系统,2025,25(9):71-81,11.
