Re: LTspice XVII error work around
#Time-step-too-small
"Time step too small" errors have plagued SPICE users for half a century.? It is not easy to predict when they will happen, and can be even harder to eliminate them. Download the LTspice FAQ file (
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Andy I
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#158795
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Re: LTspice XVII error work around
#Time-step-too-small
Such errors are difficult to resolve. In this particular case, where an ADI schematic won't run. I suggest a report to ADI's Engineer Zone. It should run in XVII, unless ADI say it won't.
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John Woodgate
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#158794
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LTspice XVII error work around
#Time-step-too-small
I had downloaded the MAX44241 Spice model and Ltspice schematic from Analog's website. For some reason I get the following error message. " Analysis: Time step too small; initial timepoint; trouble
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greenlamps99@...
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#158793
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Re: Frequency dependent common mode inductor
From https://ltwiki.org/index.php?title=B_sources_(complete_reference): Bxxx n1 n2 V=<expression> Bxxx n1 n2 I=<expression> [Rpar=<value>] *[Cpar=<value>] + [[ic=<value>] tripdv=<value>]
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mhx@...
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#158792
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Re: Frequency dependent common mode inductor
I guess so. LTspice comes with lots of models for them from Schaffner and W¨¹rth. Do you have a part number for yours? F2 > [Contrib] > Schaffner > EMI F2 > [Contrib] > Wurth > EMC-Components >
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Tony Casey
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#158791
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Re: Frequency dependent common mode inductor
Yes, as a piece of circuit or a subcircuit. But the data you have is all expressed in series component terms, whereas the circuit needs, at least,? parallel resistance and capacitance elements, which
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John Woodgate
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#158790
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Frequency dependent common mode inductor
is it possible to build a "Frequency dependent common mode inductor" in LTspice? f Ls Cs Rs [HZ] [uH] [pF] [ohm] 50 2040.3 4966800000 0.11861 100 2023.6 1251600000 0.13833 500 1997.3 50727000 0.47052
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F.an
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#158789
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Re: Monitor simulation percent completion from python
The expanded netlist returned few weeks ago in 24.1.3. It shows the components with their parameters immediately at the start of the simulation in the log file. But not the timing related parameters.
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@HermanVos
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#158788
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Re: Create symbols.
OOHH, thanks, I'll look into them.... Let's see if I can associate the symbol of an existing OP with the model I'm interested in, which is the MCP65R46.
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j.bernabe1@...
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#158787
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Re: .MEAS Failure
FYI, that is not what I suggested.? Leave the Start and Stop (or Left and Right) values alone.? Let LTspice figure them out on its own.? Change the text in the "Quantity Plotted" box.? THAT is the
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Andy I
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#158786
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Re: Create symbols.
There are two no, three things you should do: * Verify that the comparator model's subcircuit has the same number of pins in the same order: In+ In- V+ V- OUT. * Change (edit) the name next to the
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Andy I
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#158785
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Re: Create symbols.
"Help topics" is the same as pressing F1. Once the Help window opens up, there SHOULD be a column of contents on the left, and the main body on the right.? If you don't see the part on the left, then
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Andy I
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#158784
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Re: Issues running LTspice as a batch service
This is only a guess here.? But I suspect you have defined User folders for your symbols and models, which reside in one of your account's folders, perhaps under its "Documents" folder or "AppData"
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Andy I
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#158783
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Edited
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Issues running LTspice as a batch service
I have a python program kicking off LTspice as a background windows process with the following command. process = await asyncio. create_subprocess_exec ( LTSPICE_PATH , "-b" , "-run" , solverFlag ,
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Jeff Kayzerman
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#158782
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Re: Ltspice alternative for AD797
From the ADI data sheet: 110 MHz gain bandwidth (G = 1000) 8 MHz bandwidth (G = 10)
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John Woodgate
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#158781
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Re: .MEAS Failure
Having just installed V24.1.4, I noticed that: .option measdgt=x ..appears to have been disabled, and doesn't appear to do anything now - the .MEAS time points are now always double precision. The log
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Tony Casey
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#158780
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Re: intuition behind a solution to crashing time domain simulation
#Time-step-too-small
Or it suggests that there is a problem with THAT circuit when combined with a very wide-bandwidth op-amp like the AD797 (not 757). The simple circuits I tried for the AD797 ran OK. The fact that your
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Andy I
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#158779
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Re: Ltspice alternative for AD797
Have you tried the product selection guides, which most IC vendors and many distributors offer on their websites? There probably is a reason.? It might be worth investigating why.? High-bandwidth
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Andy I
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#158778
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Re: Monitor simulation percent completion from python
I don't remember with certainty if this is true - but I believe the .TRAN command has numbers when you look at the expanded netlist.? In other words, the formulas have been evaluated.? That is true
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Andy I
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#158777
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Re: Estimating Base spreading resistance for a bipolar transistor via LTspice
When temperature increases, the current resulting from the reverse-biased gate-drain junction increases exponentially, so yes, noise increases with temperature.
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Jerry Lee Marcel
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#158776
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