摘要
在高速数字电路设计中,差分对传输线可以有效地提高信号质量。应用Cadence软件与IBIS模型对三星S3C6410硬件印制电路板(PCB)中的移动DDR SDRAM进行了差分时钟信号完整性(SI)及"眼图"仿真设计。以布线前仿真为指导寻找较优的阻抗控制布线策略,用布线后仿真来验证实际布线的信号质量。仿真结果表明:合适的阻抗控制有利于差分对信号质量的改善。该设计方法对差分对及SI设计具有借鉴意义。
In the design of high-speed digital circuit, the transmission of the differential pair can improve signal quality effectively. Useing mobile DDR SDRAM of Samsung S3C6410 PCB,signal integrity and ＂eye diagram＂ performances of differential pair are simulated hy Cadence software and IP, IS model. The more excellent routing strategy of impedance controlling can be selected by pre-routing simulation and signal quality of actual routing can be verified by post-routing simulation. The simulation results show that appropriate impedance controlling is propitious to signal quality of the differential pair. The idea of the design method can be used in the differential pair and SI designs.
出处
《电子测量技术》
2012年第1期38-41,共4页
Electronic Measurement Technology
基金
福建省自然基金项目(2009J01285)资助项目
福州市科技项目(2010-G-102)资助项目
关键词
差分对
信号完整性
眼图
differential signal signal integrity eye diagram
