lBlS模型在视频高速电路设计中的应用

摘要

Based on the characteristics of video teaching system,using Samsung S5PV210 as multimedia image receiving processor,this paper designs a high-performance video teaching system.ln order to meet the requirements of the signal in-tegrity of high-speed circuit design,using lBlS model to do a series of signal integrity simulation in Cadence software,to study the two ways of connection between the CPU and camera,to analysis of the difference of differential connection and paral el connection.Results is paral el interface circuit can't stable work with the system requirements,but the differential in-terface can.And signal integrity simulation guide the design of system and PCB.%根据视频教学系统的特点，采用三星公司S5PV210作为多媒体图像接收处理器，设计了一款高性能视频教学系统。为了满足高速电路设计的信号完整性要求，重点分析了CPU与摄像头之间差分连接与并行连接的性能差别。基于lBlS模型，借助Cadence软件进行了一系列信号完整性仿真，得到了相关的有益结论，从而指导了系统和电路印制板的设计制作。实际实验系统的测试证明了仿真实验的正确性，在给定的系统要求下，并行电路接口不能满足视频采集稳定工作的要求，而差分接口摄像头能够长时稳定运行工作，满足了用户的要求。