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  3. Need a solution to build pre-computed look-up table man...

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Need a solution to build pre-computed look-up table manually

circuit apprentice
circuit apprentice over 4 years ago

Hello.

Recently, I read 'Systematic Design of Analog CMOS Circuits', which describes how to apply pre-computed look-up table.

Look-up table is 4-D DCOp table e.g. ID(L, VGS, VDS, VSB) gm(L, VGS, VDS, VSB)...

The book provided look-up table generation tool, and that requires Spectre MATLAB toolbox.

Because I access Cadence through Unix server, and I cannot use MATLAB on the server, I cannot apply that method, so I decided to make look-up table manually.

The method I chose is that...

1. Turn on ADE-L, and run multiple DC parametric analyses at once.

2. Export them as .csv

3. Organize them manually.

(I am a cadence beginner...)

There are many problems I encounter, but the main is that...

Parametric Analyses suddenly comet to a halt without error.

No error message. No freezing. Just halt(pause and continue does not work).

I use multiple duplicated schematics to separate directories.

The fundamental problem which cannot be fixed is that I cannot run MATLAB on the server.

So, I should run simulations and export the results.

1. Is there any solution to fix random halt?

2. Is there a better solution for me?

Thank you!

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  • Andrew Beckett
    Andrew Beckett over 4 years ago

    Not sure what issue you're facing really, plus you didn't mention which version of the tools you are using. I'd suggest you use ADE Explorer/Assembler which have capacity (especially in the latest IC6.1.8/ICADVM20.1 versions) using LSCS for a very large number of sweep points. They also have an interface to MATLAB, and from my understanding of MATLAB licensing, there's no platform restriction - you just need to install it.

    I'm not aware of any "random halt" even with the obsolete ADE L tool.

    Andrew.

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  • circuit apprentice
    circuit apprentice over 4 years ago in reply to Andrew Beckett

    Thank you for your replying!

    I decided to use MATLAB, and now I think it is a better decision!

    It's great.

    Sangwon.

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