b********k
发帖数: 427 | 1 多谢！
我看到HSIM手册里边有讲到stop at的命令，不过我没用过HSIM。
如果在暂停了之后，HSIM可以修改pwl的电流源就好了。
很早以前的SPICE有stop的命令，不过HSPICE好像没有。
SPICE版本太老，后来一直没有更新，所以不太好用。
over |
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b********k
发帖数: 427 | 2 我最近在学用HSPICE做tran仿真，希望HSPICE能在指定的时间t暂停，在我修改下一时刻
的电流源之后，再继续运行HSPICE。
我看了一下HSPICE中的alter命令，好像是要结束上一个仿真，然后换成新参数开始下一
个仿真，所以不太适用。
想问一下新版的HSPICE和HSIM中的transient simulation，有没有stop和resume之类的
命令？
欢迎回答或者讨论，非常感谢！ |
|
a******e
发帖数: 331 | 3 HSIM 可以
transient to sometime and ctrl-c and save snapshot. Then you can debug over
there.
or in your netlist, put
.hsimparam stopat=xxxns
HSPICE - no idea |
|
d****y
发帖数: 76 | 4 A reputable IC design company in Santa Clara is now hiring Circuit Design
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d****y
发帖数: 76 | 5 A reputable IC design company is now hiring Circuit Design Engineer with the
focus on transistor level circuit design. Please find the detailed job
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like you to join us as soon as you can.
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practice, procedures of green card application will be initiated once you
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d****y
发帖数: 76 | 8 A reputable IC design company is now hiring Circuit Design Engineer with the
focus on transistor level circuit design. Please find the detailed job
description at the end of this message. If you are well qualified, we would
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d****y
发帖数: 76 | 9 A reputable IC design company is now hiring Circuit Design Engineer with the
focus on transistor level circuit design. Please find the detailed job
description at the end of this message. If you are well qualified, we would
like you to join us as soon as you can. For those who are still in the
middle of degree program, we hope you will graduate at the end of this year,
and internship starting immediately is offered and preferred. It can also
be coordinated if you schedule to graduate in May 2012... 阅读全帖 |
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I***a
发帖数: 704 | 10 你不能直接把那个电流源的行为在spice里描述下啊， |
|
b********k
发帖数: 427 | 11 我用的是PWL电流源，在运行到时间t的时候，根据t时刻电压的结果，算出t时刻之后的
电流源的值。所以并不能一开始就定义好所有时刻的值。
Thanks anyway. |
|
l*******r
发帖数: 270 | 12 可以用DC吧，然后time=xx, save dc operatation points.
之后可以用这个inital condition run transient
时刻
下一 |
|
a******e
发帖数: 331 | 13 Yes. You can in HSPICE use
.OP xxxns
and for the initial condition file, change the value to your value
.ic ....
and in new HSPICE file,
.inc "initialcondition"
.trans ..... |
|
b********k
发帖数: 427 | 14 谢谢建议！
你说这个方法我试过，用save和load命令保存和加载dc op。
不过这个只是dc op，其实在tran仿真的一个时间点电路的状态跟dc的状态并不太一样，
tran中更多的是瞬时的状态。
所以如果下次仿真前先用initial condition，得到的初始状态跟上次仿真结束时的状态
还不太一样。 |
|
b********k
发帖数: 427 | 15 多谢！
.OP xxxns 这个命令比较好用，但是得到的OP的值好像并不能加载到HSPICE仿真中。
.inc 好像只能是include netlist吧，op命令保存的dp文件不是netlist的格式的。如果
你用inc命令来装载dp文件成功过，还请你明示，谢谢。
.ic 用来设置初始值，但是对于BJT只有vbe，bce两个参数。用这两个参数来完全设置
BJT的状态是不够的，也就是说对于给定的vbe和bce，BJT电路结构内部的其他原件的状
态是不确定的。
OP命令得到的是dp文件，我得到的关于BJT的dp文件格式如下：
subckt
element 0:q1
model 0:BJT
ib 5.8821736535p
ic 52.4261389381p
vbe 392.2462191601m
vce 6.6666661775
vbc -6.2744199583
vs ... 阅读全帖 |
|
l********g
发帖数: 68 | 16 帮朋友转到版上,感兴趣的请直接和他联系。
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l********g
发帖数: 68 | 17 Posted job opennings several weeks ago. Three opennings have been filled and
there are still several left. Please send your resume to sramcache@yahoo.
com ASAP if you are interested.
The employer sponsors H1B, and starts green card process immediately after
you join us in full time based on current policy.
Position Title: Junior Circuit Design Engineer (0-4 years experience)
Description/
Qualifications: RESPONSIBILITIES:
- High performance, low power custom circuit design in Digital-IP.
- Design... 阅读全帖 |
|
d****y
发帖数: 76 | 18 【 以下文字转载自 JobMarket 讨论区 】
发信人: dooffy (dooffy), 信区: JobMarket
标 题: Opening of Circuit Design Engineer position at a Silicon Valley company
发信站: BBS 未名空间站 (Thu Nov 10 15:49:32 2011, 美东)
A reputable IC design company is now hiring Circuit Design Engineer with the
focus on transistor level circuit design. Please find the detailed job
description at the end of this message. If you are well qualified, we would
like you to join us as soon as you can. For those who are still in the
middle of degree pr... 阅读全帖 |
|
