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.csv output in spectre

Yea Chul

Dear all

my product is "Spectre Circuit Simulator" with product version 19.1

1. my first question is below

i saw old question about exporting .csv output 

and one of your managers said there is the way of exporting csv format data using Veriloag-A 

could u let me know the way or example about creating csv format using Verilog-A???

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2. my second question is below

i saw the way of getting csv format using "faultfmt" in SPECTRE manual

but i cannot find example related to this statement 
how to use this one in SPECTRE input

Thanks in advance

Parents
    1. I don't have an example model to write CSV. You could also use ViVA to plot the signals as usual and then export them to CSV
    2. This is an option of the transient analysis, but it's specifically to do with fault simulation. You can't use it for other things, so I don't believe it has any relevance to your needs.

    Andrew

  • in reply to Andrew Beckett

    thank your for your kind reply

  • in reply to Yea Chul

    Dear Yea,

    If you are willing to run your simulations in Assembler or Explorer, you can add an output which is an expression that will save one or more waveforms to a csv file following the completion of the simulation using the SKILL function. As an example, I defined an output to print the signal "/vout" between 10 ns and 100 ns with a time step of 10 ns to file "vout.csv" following a transient simulation as follows:

    awvSaveToCSV(getData("/vout" ?result "tran") "vout.csv" ?from 1e-08 ?to 2e-07 ?step 1e-08)

    When the simulation completed, the attached file was written to my working directory. I had to add the ".txt" extension to upload the file to this Forum,

    Shawn

    Fullscreen vout.csv.txt Download 
    vout (interpolated wth step=1e-08) X,vout (interpolated wth step=1e-08) Y
1e-08,-2.224202826891835e-09
2e-08,-4.44840565378367e-09
3e-08,-6.672608480675505e-09
4e-08,-8.896811307567339e-09
5e-08,-1.112101413445917e-08
5.999999999999999e-08,-1.334521696135101e-08
6.999999999999999e-08,-1.556941978824284e-08
7.999999999999999e-08,-1.779362261513467e-08
8.999999999999999e-08,-2.001782544202651e-08
9.999999999999998e-08,-2.224202826891834e-08
1.1e-07,-2.446623109581018e-08
1.2e-07,-2.669043392270202e-08
1.3e-07,-2.891463674959385e-08
1.4e-07,-3.113883957648569e-08
1.5e-07,-3.336304240337752e-08
1.6e-07,-3.558724523026936e-08
1.7e-07,-3.78114480571612e-08
1.800000000000001e-07,-4.003565088405303e-08
1.900000000000001e-07,-4.225985371094487e-08

  • in reply to ShawnLogan

    Hi Shawn,

    Thanks for mentioning this wonderful function. How do you control number notation? For example, 3GHz is written as 3000000000, not 3e9.

    Haitao

  • in reply to HTTb

    Haitao,

    The only way to do this is to pass ?precision 9 - which means that for numbers that need more than 9 digits it will use floating point format. That may not be what you want... the underlying function has some means of changing the number notation, but this isn't exposed as an argument you can control (and I don't know what the options are even then). Probably a good enhancement request - you might want to contact customer support.

    The ocnPrint function does have ?numberNotation and ?precision - but it's not exactly designed to produce CSV.

    Andrew

  • in reply to Andrew Beckett

    Hi Andrew,

    Sure, I will definitely do that. In the meantime, what is the default precision level? It is not mentioned in the manual.

    Haitao

  • in reply to HTTb

    It looks like it would automatically change to scientific notation a number is very small. Below is an example.

    273603251806.78,7.811330748972679e-20

  • in reply to HTTb
    HTTb said:
    It looks like it would automatically change to scientific notation a number is very small. Below is an example

    Of course. What would you expect it to do? It would be bad to display small numbers as 0...

  • in reply to Andrew Beckett

    Well, as an engineer, seeing is believing Slight smile

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