Trouble with PSPice MC analysis

  • Thread starter Oliver Friedrich
  • Start date
O

Oliver Friedrich

Guest
Hallo,

I want to have a delay line with tolerances. Idid it like this:

T_T1 N00188 0 OUT 0 T1_DELAY
..MODEL T1_DELAY TRN(Z0=50 TD=50n DEV/UNIFORM 10n)

These are my two netlist lines representing my line.
There are no errors during netlisting and simulation, everything works
fine. But the DEV doesn't seem to have any effect on the TD parameter, all
runs end up with exactly 50n.
1) Why does it not work this way, is there another way?
2) Are there model parameters where a tolerance specification is not
applicable?
3) Can I use a tolerance specification outside a .MODEL defintion at all?
I want to apply tolerance specifications into sources, is this feasible?


--
Regards

Oliver Friedrich

My email has no x!
 
On Tue, 1 Aug 2006 10:59:06 +0000 (UTC), Oliver Friedrich
<xoliver.friedrich@tzm.dex> wrote:

Hallo,

I want to have a delay line with tolerances. Idid it like this:

T_T1 N00188 0 OUT 0 T1_DELAY
.MODEL T1_DELAY TRN(Z0=50 TD=50n DEV/UNIFORM 10n)

These are my two netlist lines representing my line.
There are no errors during netlisting and simulation, everything works
fine. But the DEV doesn't seem to have any effect on the TD parameter, all
runs end up with exactly 50n.
1) Why does it not work this way, is there another way?
2) Are there model parameters where a tolerance specification is not
applicable?
3) Can I use a tolerance specification outside a .MODEL defintion at all?
I want to apply tolerance specifications into sources, is this feasible?
Click to expand...
What do you have in your .MC statement?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
Oliver Friedrich wrote:
Hallo,

I want to have a delay line with tolerances. Idid it like this:

T_T1 N00188 0 OUT 0 T1_DELAY
.MODEL T1_DELAY TRN(Z0=50 TD=50n DEV/UNIFORM 10n)

These are my two netlist lines representing my line.
There are no errors during netlisting and simulation, everything works
fine. But the DEV doesn't seem to have any effect on the TD parameter, all
runs end up with exactly 50n.
1) Why does it not work this way, is there another way?
2) Are there model parameters where a tolerance specification is not
applicable?
3) Can I use a tolerance specification outside a .MODEL defintion at all?
I want to apply tolerance specifications into sources, is this feasible?


Oliver,
Click to expand...
What version are you using. You will find that tolerance definitions
are NOT universal, i.e. they don't work on everything, just some things.
I am 99.9999% sure that tline length is not one of the things that
accept tolerances. You will need to do some sort of parametric analysis
to study length variances.

Charlie
 
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