在线咨询
eetop公众号 创芯大讲堂 创芯人才网
切换到宽版

EETOP 创芯网论坛 (原名:电子顶级开发网)

手机号码,快捷登录

手机号码,快捷登录

找回密码

  登录   注册  

快捷导航
搜帖子
查看: 6754|回复: 4

急,请教高手达人,怎么用spectre仿真高速D触发器的眼图?

[复制链接]
发表于 2009-12-7 09:52:42 | 显示全部楼层 |阅读模式

马上注册,结交更多好友,享用更多功能,让你轻松玩转社区。

您需要 登录 才可以下载或查看,没有账号?注册

x
本帖最后由 mariter 于 2009-12-7 09:54 编辑

最近我设计了一款高速的DFF,速率可以达到1GHz,
跑完spectre tran仿真后,
出现了还算可以的波形信号,于是就直接调用scanwave中的caculator工具中的
eyediagram函数,设定begin time 为“0”,end time 为tran仿真结束时间,
period 设定为 “100p” 然后plot。
可得不到像样的眼图,请教高人如何进行此类数字电路的眼图仿真??

ps:输入输出信号为单级NRZ数字信号(如 1V-2V)
发表于 2009-12-7 23:48:32 | 显示全部楼层
eyeDiagram

eyeDiagram ( o_waveform n_start n_stop n_period ?advOptions t_advOptions )
=> o_waveform/nil

Description
Returns an eye-diagram plot of the input waveform signal. It returns the waveform object of the eye-diagram plot. Using an advanced option, the function also calculates the maximum vertical and horizontal opening of the eye formed when the input waveform is folded by the specified period to form the eye.
Arguments
o_waveform  Input waveform signal.
n_start  The X-axis start value from where the eye-diagram plot is to begin.
n_stop  The X-axis stop value where the eye-diagram plot is to terminate.
n_period  The period after which the waveform is to be folded to form the eye.
t_advOptions  The option to specify whether the vertical or horizontal opening of the eye is to be calculated.
Valid values: vertical, horizontal
Default value: nil
Note:  If t_advOptions is specified, the function approximates vertical eye height and horizontal eye width to assume the symmetry of the eye. The function returns the most optimum results for single eye scenarios.

Value Returned  
o_waveform  Returns a waveform object representing the eye-diagram plot of the input waveform
nil  Returns nil and an error message otherwise

Example
eyeDiagram( v("/out" ) 0n 500n 12.5n )
Returns a waveform that represents an eye-diagram plot.

eyeDiagram( v("/out" ) 0n 500n 12.5n ?advOptions "vertical" )
Calculates the maximum vertical opening of the eye that is formed when the input waveform is folded after 12.5n

eyeDiagram( v("/out" ) 0n 500n 12.5n ?advOptions "horizontal" )
Calculates the maximum horizontal opening of the eye that is formed when the input waveform is folded after 12.5n
发表于 2010-6-12 13:39:26 | 显示全部楼层
很不错。。。
发表于 2014-5-23 12:53:10 | 显示全部楼层
很受用!
发表于 2014-8-19 17:26:59 | 显示全部楼层
看不懂
您需要登录后才可以回帖 登录 | 注册

本版积分规则

小黑屋| 手机版| 关于我们| 联系我们| 在线咨询| 隐私声明| EETOP 创芯网
( 京ICP备:10050787号 京公网安备:11010502037710 )

GMT+8, 2024-11-5 12:40 , Processed in 0.019325 second(s), 8 queries , Gzip On, Redis On.

eetop公众号 创芯大讲堂 创芯人才网
快速回复 返回顶部 返回列表