eye pattern simulation on spice

[andy2000a]

1. use random generator , create a pwl signal with gittern (period )
and use the follow command in hspice


.param width=3*period phase=6ns
.probe tran time_x=par('time+phase-int((time+phase)/width)*width')
.probe tran diff=v(usbdp,usbdn)

phase is delay , and use time_x as X , then select signal diff ,
then you can get hspice USB 2.0 eye pattern simulation ..

 

[andy2000a]

put file
unix generator .. but it can not control jittern , I hope someone can rewrite and work on Win2000 , and can specify "jittern"

thank you

 

[andy2000a]

upload file again ..

 

[andy2000a]

i am sorry , I can upload file , who need it ?
and mail to me

 

[ericliu]

Sandwork's waveview-analyzer can accept hspice output format and show
eye patterns.