#500 Bug with "ngbehavior=ltps"

[Jan Seeger]

Hello! I'm terribly new at using ngspice, so this might be a user error on my part.

However, I think I've found a bug in compatibility behavior when using the "ngbehavior=ltps" option.

I've attached a sample circuit that defines a resistor model called "R_NOISELESS". The ltspice compatibility option seems to translate this into r_noisy, which isn't a parameter for the ngspice resistor model. When using the pspice compatibility setting, the file loads successfully. When renaming the resistor model to "TEST", the model works with ngbehavior=ltpsa.

I'm using ngspice-32 on Gentoo linux.

Expected behavior:

ngspice 1 -> set ngbehavior=ltpsa
ngspice 2 -> source test.cir

Circuit: Bug circuit
ngspice 3 ->

Actual behavior:

ngspice 1 -> set ngbehavior=ltpsa
ngspice 2 -> source test.cir
Error on line 4 :
r1 1 2 r_noisy=0 8k
unknown parameter (r_noisy)
    Simulation interrupted due to error!

ngspice 1 -> set ngbehavior=psa
ngspice 2 -> source test.cir
ngspice 3 ->

[Holger Vogt]

It is a bug. I will take care.

Number 500: congratulations!

Holger

[Jan Seeger]

Lovely! I'll test it next week!

On July 10, 2020 6:00:39 PM GMT+02:00, Holger Vogt h_vogt@users.sourceforge.net wrote:

• status: open-accepted --> closed-fixed
• Comment:

A fix is uploaded to branch pre-master.

---

** [bugs:#500] Bug with "ngbehavior=ltps"**

Status: closed-fixed
Group: v1.0 (example)
Labels: compatibility
Created: Fri Jul 10, 2020 09:43 AM UTC by Jan Seeger
Last Updated: Fri Jul 10, 2020 09:54 AM UTC
Owner: Holger Vogt
Attachments:

-
test.cir
(88 Bytes; application/octet-stream)

Hello! I'm terribly new at using ngspice, so this might be a user error
on my part.

However, I think I've found a bug in compatibility behavior when using
the "ngbehavior=ltps" option.

I've attached a sample circuit that defines a resistor model called
"R_NOISELESS". The ltspice compatibility option seems to translate this
into r_noisy, which isn't a parameter for the ngspice resistor model.
When using the pspice compatibility setting, the file loads
successfully. When renaming the resistor model to "TEST", the model
works with ngbehavior=ltpsa.

I'm using ngspice-32 on Gentoo linux.

Expected behavior:

ngspice 1 -> set ngbehavior=ltpsa
ngspice 2 -> source test.cir

Circuit: Bug circuit
ngspice 3 ->

Actual behavior:

ngspice 1 -> set ngbehavior=ltpsa
ngspice 2 -> source test.cir
Error on line 4 :
r1 1 2 r_noisy=0 8k
unknown parameter (r_noisy)
Simulation interrupted due to error!

ngspice 1 -> set ngbehavior=psa
ngspice 2 -> source test.cir
ngspice 3 ->

---

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[Holger Vogt]

A fix is uploaded to branch pre-master.