ocean PVT仿真

airbirds

请教下，用ocean 仿真PVT后，可以看到所有情况下的仿真波形，但问题是波形太多了，我如何知道哪一条波形是什么情况下的仿真结果，有没什么快捷的办法，找出某条波形所对应的corner、temp、vdd的值。。我现在的办法是，选中想知道的波形，然后慢慢找，看下是第几条曲线，然后再根据循环语句来计算得到结果，这样太痛苦了，恳请大虾支招。。

kwankwaner

回复 1# airbirds


   在每个循环中加一句打印当次循环的编号和PVT参数到一个文件，用文件和图对照着看，就知道编号所对应的PVT了。

cyl

回复 1# airbirds


    plot(your_signal ?expr'("your_corner"))

qerqing

比较习惯把波形里需要的信息用公式表示出来，然后打到CSV文件里

airbirds

回复 2# kwankwaner


   能不能具体点，把语句也给我。。呵呵，我是菜鸟。。

airbirds

回复 3# cyl


   能不能具体点，我初学ocean。。下面是我的语句，能不能告诉我加在哪？ocnWaveformTool( 'wavescan )
simulator( 'spectre )
design(
"/home/simulation/sim_vref/spectre/schematic/netlist/netlist")
resultsDir( "/home/simulation/sim_vref/spectre/schematic" )

mvCorner=list( "sp_mv_ff" "sp_mv_fs" "sp_mv_ss" "sp_mv_sf")
bjtCorner=list( "sp_bjt_min" "sp_bjt_max")
mimCorner=list( "sp_mimcap_min" "sp_mimcap_max")
lvCorner=list("sp_lv_tt")
resCorner=list( "sp_resistor_min" "sp_resistor_max")
tmp=list(-40  85)

vlot=list(2.3 3 3.7)


foreach(lv lvCorner
foreach(mv mvCorner
foreach(bjt bjtCorner
foreach(res resCorner
foreach(mim mimCorner
foreach(temp tmp

foreach(vdd vlot
i=i+1

modelFile(
    list("/home/yuqh/simulation/model_lib/sp_header_spectre.scs",lv)
    list("/home/yuqh/simulation/model_lib/sp_header_spectre.scs",mv)
    list("/home/yuqh/simulation/model_lib/sp_header_spectre.scs",bjt)
    list("/home/yuqh/simulation/model_lib/sp_header_spectre.scs",res)
    list("/home/yuqh/simulation/model_lib/sp_header_spectre.scs",mim)




)
analysis('tran ?stop "50u"  ?errpreset "conservative"  )
desVar(
  "VCI" vdd
)

temp( temp)
run()
selectResult( 'tran )
plot(getData("/I0/Vbg") )

)
)
)
)
)
)
)

airbirds

回复 4# qerqing

能不能具体点，我初学ocean。。下面是我的语句，能不能告诉我加在哪？ocnWaveformTool( 'wavescan )
simulator( 'spectre )
design(
"/home/simulation/sim_vref/spectre/schematic/netlist/netlist")
resultsDir( "/home/simulation/sim_vref/spectre/schematic" )

mvCorner=list( "sp_mv_ff" "sp_mv_fs" "sp_mv_ss" "sp_mv_sf")
bjtCorner=list( "sp_bjt_min" "sp_bjt_max")
mimCorner=list( "sp_mimcap_min" "sp_mimcap_max")
lvCorner=list("sp_lv_tt")
resCorner=list( "sp_resistor_min" "sp_resistor_max")
tmp=list(-40  85)

vlot=list(2.3 3 3.7)


foreach(lv lvCorner
foreach(mv mvCorner
foreach(bjt bjtCorner
foreach(res resCorner
foreach(mim mimCorner
foreach(temp tmp

foreach(vdd vlot
i=i+1

modelFile(
    list("/home/yuqh/simulation/model_lib/sp_header_spectre.scs",lv)
    list("/home/yuqh/simulation/model_lib/sp_header_spectre.scs",mv)
    list("/home/yuqh/simulation/model_lib/sp_header_spectre.scs",bjt)
    list("/home/yuqh/simulation/model_lib/sp_header_spectre.scs",res)
    list("/home/yuqh/simulation/model_lib/sp_header_spectre.scs",mim)




)
analysis('tran ?stop "50u"  ?errpreset "conservative"  )
desVar(
  "VCI" vdd
)

temp( temp)
run()
selectResult( 'tran )
plot(getData("/I0/Vbg") )

)
)
)
)
)
)
)

cyl

试着把最后一句脚本要改；
Vbg=VT("/I0/Vbg")
plot(Vbg ?expr list(strcat(vdd temp lv mv bjt res mim)))

airbirds

回复 8# cyl
analysis('tran ?stop "50u"  ?errpreset "conservative"  )
desVar(
  "VCI" vdd
)

temp( temp)
run()
selectResult( 'tran )

Vbg=VT("/I0/Vbg")
plot(Vbg ?expr list(strcat(vdd temp lv mv bjt res mim)))


)
)
)
)
仿真结果为：

   *Error* strcat: argument #1 should be either a string or a symbol (type template = "S") - 2.3*Error* load: error while loading file - "vref_bg.ocn"

airbirds

回复 9# airbirds

我把语句改为：Vbg=VT("/I0/Vbg")plot(Vbg ?expr list(strcat("vdd" "temp" "lv" "mv" "bjt" "res" "mim")))


仿真不会出错，但显示结果为下图

仿真结果

还是没得到想要的结果，应该是循环语句没把值赋给输出。