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How to fix this: { *Error* eval: undefined function } on cadence IC5.1.4.1

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KimPhan

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Hi everybody,
I do simulation on cadence IC5.1.4.1 with PDK BiCMOS 180nm but when I want to see the operating point of bjt,
it shows me like this:

Capture.PNG

Can anybody help me to solve this error?
Thank you very much.
 

Thank for your attention,
This is the CDF parameter

2.PNG

Is it OK with your requirement?
 

Show me CDF of Cell not Lib.

Confirm model description of BJT.

Is BJT a subckt ?
If so, it has to be inline sub circuit.
Code: 
inline subckt gpdk090_npn (C B E)
parameters area=1 
gpdk090_npn (C B E)  gpdk090_npn_x area=area
model gpdk090_npn_x bjt type=npn is=cis*(1-2m/26m*pis_mc)*3.26E-16 va=cvaf*60 bf=cbeta*100 ise=cis*3.2E-16
+                      br=cbeta*6 nc=2 ikr=1m rc=10 vje=0.7  rb=1000 re=1 var=cvaf*5
+                      cjc=ccj*0.05e-12 fc=0.5 cje=ccj*0.07e-12 kf=0.1f ikf=0.5m
+                      tr=ctf*200e-12 tf=ctf*10e-12 itf=0.03 vtf=1 xtf=2 mvt0=1.41*2m
ends gpdk090_npn

What parameters do you want to show ?
 
Last edited:

pancho_hideboo said:
Show me CDF of Cell not Lib.

Confirm model description of BJT.

Is BJT a subckt ?
If so, it has to be inline sub circuit.
Code: 
inline subckt gpdk090_npn (C B E)
parameters area=1 
gpdk090_npn (C B E)  gpdk090_npn_x area=area
model gpdk090_npn_x bjt type=npn is=cis*(1-2m/26m*pis_mc)*3.26E-16 va=cvaf*60 bf=cbeta*100 ise=cis*3.2E-16
+                      br=cbeta*6 nc=2 ikr=1m rc=10 vje=0.7  rb=1000 re=1 var=cvaf*5
+                      cjc=ccj*0.05e-12 fc=0.5 cje=ccj*0.07e-12 kf=0.1f ikf=0.5m
+                      tr=ctf*200e-12 tf=ctf*10e-12 itf=0.03 vtf=1 xtf=2 mvt0=1.41*2m
ends gpdk090_npn

What parameters do you want to show ?
Click to expand...


Here is the CDF of cell in 3 mode: effective, user, base
1.1.PNG1.2.PNG2.PNG3.1.PNG3.2.PNG

I tried to change CDF of cell or lib many times, but it still didn't work.

Actually I want to know everything about BJT like ic, ie, vbe, vce, ft,... through the print command in
analog environment.
But just show some typical specifications like ic, vce, vcesat, ft on the schematic.
In the PDK, just bjt npn have this problem.
I dont know how to fix this problem with your code.
Please give me some details to fix it?
Thank you.
 

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Confirm model description of BJT.

Is BJT a subckt ?
If so, it has to be inline sub circuit.

And try "Schematic>Edit>Component Display".
 

pancho_hideboo said:
Confirm model description of BJT.

Is BJT a subckt ?
If so, it has to be inline sub circuit.

And try "Schematic>Edit>Component Display".
Click to expand...


Sorry for that.
It is a component in the PDK BiCMOS 180nm, not a subckt.
 

KimPhan said:
Sorry for that.
It is a component in the PDK BiCMOS 180nm, not a subckt.
Click to expand...
No.
Generally models of PDK are described as subcircuit especially for RF device.
Confirm model description.

And try "Schematic>Edit>Component Display".
 

pancho_hideboo said:
No.
Generally models of PDK are described as subcircuit especially for RF device.
Confirm model description.

And try "Schematic>Edit>Component Display".
Click to expand...


This is about the security problem. So I can just show you some lines of the model description below:

Code dot - [expand]
1
2
3
4
5
6
7
8
9
10
11
12
13

subckt ln122_hicum (3 2 1 9)
parameters temprise=0 l=10.16e-6 postlayout=0 rth_flag=0 
*.PARAM
+ rth_flag_final = min( rth_flag+rth_flag_global, 1)
+ eml = l*1e6 
+ el = l*1e6
+ ef = 1
+ emw = 1.5e-07*1e6
+ sqrt_el = sqrt(m*ef*el)
+ sqrt_ew = sqrt(emw)
+ sqrt_em_area = sqrt(m*ef*emw*el)
.........
ends ln122_hicum

I think I can not edit the model description.
And I try to schematic-edit-Component Display and I set like this but it didn't work.
aaa.PNG

So what shoud I do now to fix this?
 
Last edited by a moderator:

As I suspect, it is not inline subcircuit.
You can not annotate anything.

Can you understand "inline subcircuit" ?

Change it to inline subcircuit.

KimPhan said:
I think I can not edit the model description.
Click to expand...
Copy model files.

KimPhan said:
And I try to schematic-edit-Component Display and I set like this but it didn't work.
Click to expand...
You don't select any instance.
 
Last edited:

pancho_hideboo said:
As I suspect, it is not inline subcircuit.
You can not annotate anything.

Can you understand "inline subcircuit" ?

Change it to inline subcircuit.

Copy model files.

You don't select any instance.
Click to expand...


I changed all subckt to inline subckt in the model description as you said and
then I tried to edit_component display and i choose the component on the schematic
like the picture I attached. As result, it still didn't work as expected.
ffff.PNG

In the PDK, only this npn device have this problem. I did with fet in PDK and it was OK.
 

Show me your inline subcircuit description.
Can you understand inline subcircuit correctly ?
 
Last edited:

pancho_hideboo said:
Show me your inline subcircuit description.
Can you understand inline subcircuit correctly ?
Click to expand...

I just replaced all subckt to inline subckt like this:

inline subckt ln122_hicum (3 2 1 9)
parameters temprise=0 l=10.16e-6 postlayout=0 rth_flag=0
*.PARAM
+ rth_flag_final = min( rth_flag+rth_flag_global, 1)
+ eml = l*1e6
+ el = l*1e6
+ ef = 1
+ emw = 1.5e-07*1e6
+ sqrt_el = sqrt(m*ef*el)
+ sqrt_ew = sqrt(emw)
+ sqrt_em_area = sqrt(m*ef*emw*el)

ends ln122_hicum

I am not specialize in this. Can you tell me some details.
Thank you.
 

You show only header.
Show me all contents.
There is no BJT device description.
 
Last edited:

pancho_hideboo said:
You show only header.
Show me all contents.
There is no BJT device description.
Click to expand...

I am so sorry to rely your comment slowly.
Please send me your email and I will send you
the model description file.
Thank you so much.
 

I don't see anything to say what the "annotation texts"
are. You can dig into the symbol view and see their
literal form. Compare those texts' construction to ones
that -do- annotate properly. Is there a difference?
That might lead you somewhere.

Now you can look for (I forget which branch of the
menu tree) Annotate>Design Defaults and this ought
to change those texts to the geometric properties
of the transistor. Does this work? It had better. If it
fails similarly then I'd guess that the CDF stuff that
maps those texts' functions' arguments is busted.

I don't see any mention that you tried to avail
yourself of the sourcing foundry's applications
engineers, who ought to know the library contents
better than we do (esp. since you do not mention
the foundry). But then I see "gpdk..." which may
mean this PDK is really just an illusion from a pool
of contributors, none of whom have any responsibility
to help you. Still, gpdk affiliated discussion boards
may be a more likely source of help (or, at least,
confirmation that you're not alone in this problem).

The last possibility that comes to mind is that the
function is, as it says, simply undefined (or, you are
missing some -other- definition / declaration). Look
to your install procedure and any special instructions
about where to put things and environment variables
that have to be set consistently with that. Look also
to your CDS.log file starting from the top for errors
and warnings about stuff-not-found.
 
Surely see https://www.edaboard.com/showthread.php?t=371576#4

Code: 
inline subckt ln121_hicum (3 2 1 9)
//q 3 2 1 9 mdn_hicum trise=temprise
ln121_hicum (3 2 1 9) mdn_hicum trise=temprise
ends ln121_hicum

inline subckt ln122_hicum (3 2 1 9)
//q 3 2 1 9 mdn_hicum trise=temprise
ln122_hicum (3 2 1 9) mdn_hicum trise=temprise
ends ln122_hicum

inline subckt ln232_hicum (3 2 1 9)
//q 3 2 1 9 mdn_hicum trise=temprise
ln232_hicum (3 2 1 9) mdn_hicum trise=temprise
ends ln232_hicum

inline subckt mn121_hicum (3 2 1 9 )
//q 3 2 1 9 mdn_hicum trise=temprise
mn121_hicum (3 2 1 9) mdn_hicum trise=temprise
ends mn121_hicum 

inline subckt mn122_hicum (3 2 1 9 )
//q 3 2 1 9 mdn_hicum trise=temprise
mn122_hicum (3 2 1 9) mdn_hicum trise=temprise
ends mn122_hicum 

inline subckt mn232_hicum (3 2 1 9 )
//q 3 2 1 9 mdn_hicum trise=temprise
mn232_hicum (3 2 1 9) mdn_hicum trise=temprise
ends mn232_hicum
 
Last edited:
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