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thanks Helmut, its running ok with models downloaded from duncanamps.com thanks a lot guille --- Helmut Sennewald <helmutsennewald@...> wrote:

Reinier, Yes, the thing I have in mind would do that. Below is a list prepared for someone else who asked about this offline: I've in mind to model GBW, AOL, slew limit, voltage and current noise and

<helmutsennewald@y...> wrote: LTSpice. netlist.

wrote: symbol

LMC6484A.sub. with 6484a.sub http://docs.yahoo.com/info/terms/

Andre, No this isn't possible in LTspice. It's pretty hard to implement. What you can do, to help with your confidence in the solution from a .ac analysis, is to do a .step set of runs that varies

Hi Mike,

Yes, I was able to reduce gmin to 1e-11, though. Apparently so, now the MOSFET's leak more. BTW, the model, since it uses current sources, should probably be run with the "Add GMIN across current

--- In LTspice@..., Panama Mike <panamatex@y...> wrote: > Helmut, > > > [...]I have read in a book? that .TRAN analysis > > always does converge better. > > > > Hello Mike, is that

I wrote: but meant: [...] I suggest either removing vfb=... from the models or just ignoring the error message and then asking TI/Burr-Brown why the error is in the model. --Mike

Helmut, The .tran solution is always more believable than the .op solution. SPICE programs are prone to "false convergence", a numerical situation in which the error-based checks accept an answer

Steve, Thanks for the link. OK, here's the story. Jssw is a perimeter-based bulk leakage current parameter. The MOSFET models in the the macro model are written such that the bulk leakage is dominated

Hello Steve, the magic trick for the convergence problem in .AC analysis is the latest 'gnin parallel current source' feature. That was the only way I found to get convergence in .AC analysis for this

with Hello Bill, you will find the symbol in the "misc" directory. A short description follows: 1. Load the triode symbol into your schematic. 2. Replace the value 'triode' with the model name used in

kaplounovski wrote: Try leaving model blank and using value = lmc6484a without the .sub Good Luck Jim Stockton

Hello, I'm trying to use the National LMC6484A opamp model in LTSpice. I've downloaded their model and placed it into ..&#92;LTC&#92;SWCADIII&#92;lib&#92;sub directory under the name LMC6484A.sub.

Please post any replies to this question to the list. I'm interested in vacuum tube modeling. Thanks, Bill --- guille_bonh <guille_bonh@...> wrote:

I'd appreciate any help on modeling valves. For example, I copy what I have for the triode 12AX7A: * 12AX7A Triode PSpice Model 8/96, Rev. 1.0 (fp) * *

--- polapart <sahawley@m...> wrote: I couldn't find this model. Can you send it to me. --Mike Here's the link to the TI page. Thanks http://focus.ti.com/docs/prod/productfolder.jhtml?