完善资料让更多小伙伴认识你,还能领取20积分哦, 立即完善>
嗨,我在这里使用GTP差分对。
手册说如果PCB轨道W / s大于0.4则需要设计100欧姆的差分阻抗。 这是否意味着如果W / s足够小,例如,宽度超过15密耳的5mil,我可以使用两个sinle结束接口来连接GTP差分对? 像MGTTXP0 / MGTTXN0? 以上来自于谷歌翻译 以下为原文 Hi, I am using the GTP differential pair here. The manual said if the pcb track W/s bigger than 0.4 then need to desing 100 ohm differential impedence. Is that mean if W/s small enough, for example, 5mil width over 15 mil space, I can using two sinle ended interface to connect the GTP differential pair? like MGTTXP0/MGTTXN0? |
|
相关推荐
4个回答
|
|
Y,
差分最适合噪声抑制和信号完整性。 如果必须,您可以使用两根50欧姆单端传输线(例如当您通过SMA连接器和电缆时),但您应该返回使用印刷电路板上的差分对。 使用信号完整性分析仪工具,如Hyperlynx,确保所有宽度和间距都正确(模拟信号不完整,验证阻抗和匹配)。 Austin Lesea主要工程师Xilinx San Jose 以上来自于谷歌翻译 以下为原文 y, Differential is best for noise rejection, and signal integrity. If you must, you may use two 50 ohm single ended transmission lines (such as when you go through SMA connectors and cables) but you should return to using differential pairs on the printed circuit board. Use a signal integrity analyzer tool, such as Hyperlynx to make sure all your widths and spacings are correct (simulate the signal inetgrity, verify the impedances and matching). Austin Lesea Principal Engineer Xilinx San Jose |
|
|
|
谢谢,奥斯汀,
我会做差分对。 还有一个问题,当我必须使用toplayer来路由差分对时,很难使得跟踪50欧姆Z0和100欧姆Zd用于差分,因为它将导致非常薄的toplayer堆栈厚度。 在这种情况下,哪个更重要,50欧姆Z0或100欧姆Zd? 或者只是要见到他们两个? 以上来自于谷歌翻译 以下为原文 Thanks, Austin, I will do the differential pairs. One more question, when I have to use the toplayer to route the differential pairs, it is hard to make the track both 50 ohm Z0, and 100 ohm Zd for differential, becaues it will end up very thin thickness of toplayer stack. In this case, which comes more important, 50ohm Z0 or 100 ohm Zd? or just have to meet both of them? |
|
|
|
Y,
要么设计为100欧姆差分,要么设计为50欧姆单端。 一个或另一个(不是两个)。 信号将以差分方式启动和接收,因此100欧姆差分是最重要的。 只有当你必须转换为单端接通或断开电路板时,50欧姆+,50欧姆才变得重要。 Austin Lesea主要工程师Xilinx San Jose 以上来自于谷歌翻译 以下为原文 y, Either you design for 100 ohms differential, or for 50 ohms single ended. One, or the other (not both). The signal will be launched and received differentially, so the 100 ohms differential is the most important. It is only when you must convert to single ended to get on, or off, the board, that 50 ohms on +, and 50 ohms on - becomes important. Austin Lesea Principal Engineer Xilinx San Jose |
|
|
|
|
|
|
|
只有小组成员才能发言,加入小组>>
2134 浏览 7 评论
2590 浏览 4 评论
Spartan 3-AN时钟和VHDL让ISE合成时出现错误该怎么办?
2063 浏览 9 评论
3135 浏览 0 评论
如何在RTL或xilinx spartan fpga的约束文件中插入1.56ns延迟缓冲区?
2166 浏览 15 评论
有输入,但是LVDS_25的FPGA内部接收不到数据,为什么?
399浏览 1评论
1504浏览 1评论
在使用xc5vsx95T时JTAG扫片不成功,测量TDO无信号输出
2164浏览 0评论
495浏览 0评论
1618浏览 0评论
小黑屋| 手机版| Archiver| 电子发烧友 ( 湘ICP备2023018690号 )
GMT+8, 2024-3-29 17:45 , Processed in 1.083952 second(s), Total 78, Slave 62 queries .
Powered by 电子发烧友网
© 2015 bbs.elecfans.com
关注我们的微信
下载发烧友APP
电子发烧友观察
版权所有 © 深圳华秋电子有限公司
电子发烧友 (电路图) 粤公网安备 44030402000349 号 电信与信息服务业务经营许可证:合字B2-20210191 工商网监 湘ICP备2023018690号