andy2000a
Advanced Member level 2
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 ..
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 ..