利用Allegro实现万兆子卡的高速电路设计  

The implement of high_speed circuit design in the 10GbE subcard by Allegro

作　　者：詹萌[1,2] 胡春晖 

机构地区：[1]武汉邮电科学研究院,湖北武汉430074 [2]武汉烽火网络有限责任公司,湖北武汉430074

出　　处：《电子设计工程》2016年第14期178-180,共3页Electronic Design Engineering

摘　　要：为了满足日益增长的网络需求,设计了一款用于万兆以太网中高端路由器的光接口子卡,介绍了该子卡的硬件架构,使用的主要芯片及其能完成的功能。针对高速系统中存在的信号完整性的问题,提出了差分线对这一有效可靠的布线方式,重点说明了差分线对的布线准则、设置方法以及其需要注意的问题。采用Cadence公司的Allegro软件,以子卡上的SFP+接口信号为例,阐明了差分信号在PCB中的实现。最终通过各项测试,得以投入生产。In order to meet the growing demand of the network, a subcard in the 10 Gigabit Ethernet high-end router is designed, then introduce the hardware architecture of it, the chip it used and its function. Aiming at the problems of signal integrity in the high speed system, the thesis proposes the differential pair which is an effective and reliable wiring way in the high speed system,puts the emphasis on the routing recommendation、setting methods and the roblems of attention while using differential pair. Using Allegro software, setting the SFP＋ interface as an example, illustrates the implementation of differential signal in PCB. Finally the subcard goes through the tests, and is put into production.

关 键 词：高速电路 万兆子卡 差分线对 ALLEGRO 

分 类 号：TN914[电子电信—通信与信息系统]