开云体育

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?

By the way, here's my .ASC file. Sadly, By the way, I'm including my .ASC version as an attachment. If that doesn't work in these posts, I'll just add it as text (but the darned word-wrapping will

Thanks, I took a look at that. But it uses a set Vbe, which I have to estimate beforehand and then measure and then re-edit into the .param and then re-run and then re-measure and ... I was wondering

--- polapart <sahawley@...> wrote: I couldn't find this model. Can you send it to me. --Mike __________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA

Jon, The .asc file below might get you started there. --Mike Version 4 SHEET 1 892 900 WIRE 320 576 320 528 WIRE 320 448 320 400 WIRE 320 304 320 240 WIRE 320 240 128 240 WIRE 128 240 128 256 WIRE 128

I am trying to run a Burr Brown Op Amp, the OPA336. The transient analysis "sort of" runs but LTSpice notes a couple of problems, most notably unrecognized parameters, jssw and vfb. The AC analysis

I'm interested in calculating iterative values for resistors. For example, an emitter resistor's value may be based on the emitter voltage divided by some current I need to have. However, the emitter

Wonderful! That works better than I'd hoped. Glad you added the extra code to make that happen during updating.

Jon, The selection dialogs for bipolars, jfets, diodes, and mosfets use the .model entries in the files ./lib/cmp/standard{.bjt,.jft,.dio,.mos} You can edit these with a text editor(or LTspice) to add