Simulation Warnings in agilent ads

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dpa2007

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Hello everyone,
i currently simulate a digital block diagram model in ADS and i get these warnigs:
Number of nodes with only one device attached (topology corrected): 25
Number of nodes with no DC path to ground (topology corrected): 8
Click to expand...
but i don't have any "floating pin" in my circuit.
could anyone help me, figure out the simulation problem?
thanks in advanced.
 
Hello,thank you for your reply.
here is my netlist and log file
 

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  • netlist.txt
    20.4 KB · Views: 308


I think there is no problem since they are internal nodes in provided model which we can't access except for "_net548" and "_net540".
"_net548" and "_net540" are connected to "Open Circuit Type OutSelector".

 
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thank you very much for the answer.i just saw your reply post.so there is no need to worry about these warnings?
 

pancho_hideboo said:
Yes, you don't have to worry about them at all.
Click to expand...

my problem was that i was able to implement and simulate simple (or more advanced) circuits and block diagrams but that one was (still is...) a bigger trouble.
thanks again.
 

i made some changes in the design.
i don't get any warnings.
but i get an error:
Redefinition of `LOpower_dBm'
is this error telling me that this variable is defined more than one times?
 

hello i am attaching the netlist.
is better to provide the design?
or is it equivalent?:?:
thanks in advanced.
 

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  • netlist1.txt
    6.3 KB · Views: 95

dpa2007 said:
hello i am attaching the netlist.
Click to expand...
This is not ADS Format Netlist.
This is SPICE Format Netlist.

Why do you show SPICE Format Netlist ?

Simply "LOpower_dBm" is defined at two places. And they are not pass parameters of Subcircuit.

Your problem is very trivial.
I can find duplicate or unnecessary parameter's definitions other than "LOpower_dBm" in your netlist.
Carefully check all your schematics.
 
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i am a new user.
sorry for the spice netlist.
how can i find the ads netlist?
i'm going to delete the duplicate entries.

edit:
i found how to get the ads netlist
 

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you're right,
i believe this one is the correct one.

i made some other changes(replace the one converter) and now i am getting errors for the Tstep and other time parameters which i had change also.
so i believe i must correct them.
i also used transient analysis in cosim blocks and not the envelope, which is now deactivated.
 

Attachments

  • netlist.cnex.txt
    6.1 KB · Views: 74
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dpa2007 said:
you're right,
i believe this one is the correct one.
Click to expand...
Not correct at all.
Attached "netlist.cnex.txt" is a SPICE Format Netlist.
Surely read contents of link in my append.

What on earth do you want to mean ?
Have your all problems been able to resolved ?
 
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pancho_hideboo said:
Not correct at all.
Attached "netlist.cnex.txt" is a SPICE Format Netlist.
Surely read contents of link in my append.

What on earth do you want to mean ?
Have your all problems been able to resolved ?
Click to expand...

hello pancho,thanks again for helping.

in my design i had to used an upconverter and a downconverter.
when i used the component SDC_AMFA and SDC_AMUFA as cosimulation for up and down converters i get the error message with the dublicate variable:LOpower_dBm.
when i used only the SDC_AMFA this error eliminated and i get errors about the timings like TStep.

i get the netlist_new.txt,that i am currently attached, from the netlist.log file in project folder.is this the correct and not the other from menu:
Tools>Netlist Export>Create ADS FrontEnd Netlist?
 

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  • netlist_new.txt
    18.2 KB · Views: 84

What is your native language ?
It is very difficult and tired to read and understand your poor sentences.

Surely read documents.

dpa2007 said:
Tools>Netlist Export>Create ADS FrontEnd Netlist?
Click to expand...
This is a SPICE Format Netlist.
Again surely read documents.

dpa2007 said:
i get the error message with the dublicate variable:LOpower_dBm.
when i used only the SDC_AMFA this error eliminated and i get errors about the timings like TStep.
Click to expand...
Your problems are very easy and trivial.

You use "global parameter definition" in your schematics.
Do you understand this ?
Carefully check all schematics.
 
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volker_muehlhaus said:
What makes you think that netlist_new.txt from post #13 is a SPICE netlist?
Click to expand...
It is ADS Format Netlist.

You can't understand a meaning of my append.
Surely read my append of "#14" as reply for "#13".
dpa2007 said:
Tools>Netlist Export>Create ADS FrontEnd Netlist?
Click to expand...
This command is for netlisting a SPICE Format Netlist.

Many people wrongly use this command for netlisting ADS Format Netlists.
See The Designer's Guide Community Forum - ADS2009 Harmonic Balance.
 

Again surely read my append in "#14".

volker_muehlhaus said:
No. I just wanted to tell you to read the questions and look at the file before posting answers what the file is.
Click to expand...
Of course, I looked file. So I can write following in "#14".
If I don't see "netlist_new.txt‎", I can't know that global parameter definition" is used.
pancho_hideboo said:
You use "global parameter definition" in your schematics.
Do you understand this ?
Click to expand...

Rather I tell you surely to read all appends and not to append valueless comments.
I don't mention "netlist_new.txt‎" in "#14" at all.

I explained "Tools>Netlist Export>Create ADS FrontEnd Netlist" is for SPICE Format Netlisting not ADS Format Netlisting.
 
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thank you again for the advice Pancho,
i am going to read again,more carefully the links.
sorry for the unwanted information that i posted.

---------- Post added at 17:00 ---------- Previous post was at 16:51 ----------
Hello Pancho,thanks again.
yes i can understand you are telling me.
but i am a new user in ads a not very familiar with simulations with analog and digital parts.
I'm going to check again all schematics.
 

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