[SI-LIST] Simple H-Spice Question
- From: "gsletch" <gsletch@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 07 Feb 2005 23:23:09 -0000
I am trying to simulate a simple lossless transmission line driving a
resistive load, no reflections, etc. I know the Z0, the line length,
the risetime and the TD. I want to have control over the number of
T-Line segments...This is an academic prob. and I am a newbie at
H-Spice...
I am using the lossless transmission line model for H-Spice:
T1 100 0 180 Z0 = 70.7 TD = 7070p L = 10c
I found in the manuals where you can add to the end of the above line
the following: "model lumps=10 L=10c" and it will allow you to control
the number of T-line segments....
The way I understand it, the simulator basically takes the initial
info. and figures out the total L and C, the correct number of
segments and the subsequent values of L and C at that segment number,
but you can override this with "model lumps=10 L=10c".
I can't get it to work with or without the "model lumps=10 L=10c". Am
I doing something wrong? This is such a simple problem...I must be
missing something incredibly obvious...
LCLINE
* Main program
T1 100 0 180 Z0 = 70.7 TD = 7070p L = 10c
* Dummy Resistor for end of line open
RT 180 0 100meg
* Excitation
* Falling Edge Vstart Vend delay Tr Tf PW Period
VIN 90 0 PULSE (1 0 0PS .2NS .2NS 20NS 40NS)
* Source Resistance
RS 90 100 70.7
*
.OPTIONS POST=2 PROBE TNOM=25 DELMAX=2PS RMIN=1E-12 BRIEF NOMOD
.TRAN 100PS 8NS
.WIDTH OUT=80
.PLOT TRAN V(180) V(100) (0. ,1. )
.PRINT TRAN V(180) V(100)
.END LCLINE
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
