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Thanks, but you should not have uploaded .RAW? and .LOG file. Now, I suppose you are looking at Figure 13 in the data sheet. If not, what are you looking at. I see the current in the voltage source Vs matches Figure 13 quite well, but shows as negative values. Please explain clearly what difference do you see between your simulation and the corresponding example in the application note.

I put it in temp file as you said /g/LTspice/files/Temp/BUK7S1R0-40H%20output%20characteristics.zip i meant AP note AN90034 wich is also in the .zip

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Also, which Application Note do you mean? The Nexperia web site lists several.

We can't help much unless you let us see more of what you are doing. Upload your .ASC file AND all the other files required to run the simulation, but not .RAW? and .LOG files or pictures,? in a ZIP archive to Files => Temp.

Go to the web page: /g/LTspice/topics. Click on Files in the list on the left. Then click on Temp. Then click on New Upload in the blue box at top left. Click on Upload File in the drop-down menu. Then send a message to tell us that you did that.

On 2025-03-11 12:10, matichvala6 via groups.io wrote:

I am having issue with simulating experia BUK7S1R0-40H PET LTspice model characteristics when simulating mosfet with exact same setup as it is in application note i get quite different results for example output characteristic or transfer characterisitc. Anyone know what could be the problem here ??

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We can't help much unless you let us see more of what you are doing. Upload your .ASC file AND all the other files required to run the simulation, but not .RAW? and .LOG files or pictures,? in a ZIP archive to Files => Temp.

Go to the web page: /g/LTspice/topics. Click on Files in the list on the left. Then click on Temp. Then click on New Upload in the blue box at top left. Click on Upload File in the drop-down menu. Then send a message to tell us that you did that.

I am having issue with simulating experia BUK7S1R0-40H PET LTspice model characteristics when simulating mosfet with exact same setup as it is in application note i get quite different results for example output characteristic or transfer characterisitc. Anyone know what could be the problem here ??

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That's a good clarification. Thanks. Andy.

A few days ago, John Woodgate wrote:

2. Drawing a wire with CTRL held down doesn't allow the wire to start and end off-grid. It's the same if I draw lines instead of wires. I can't find a 'Snap to grid' check box to untick.

After some thought, I think that you never could use the CTRL key, nor anything else, to make a wire not snap-to-grid.? I think wires and components can only snap-to-grid.

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Reading the Help instructions:

The graphical annotations to the schematic; lines, rectangles, circles, and arcs; snap by default to the same grid as the used for electrical contacts of wires and pins. Hold down the control key while positioning these to defeat this snap.

This is the only place I found where it talks about not snapping-to-grid, and note that it applies ONLY to lines, rectangles, circles, and arcs.? It does not apply to Wires. ?Note the distinction between Wires and Lines.? Lines (right-click < Draw > Line) are non-functional, whereas Wires (F3, or the "Wire" toolbar button) make electrical connections. ?I think the conclusion is that holding down CTRL never worked for drawing wires off-grid.? For wires, CTRL only toggles whether they can be drawn at an angle.

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It makes sense to me that Wires could never be made off-grid, because it could be challenging to connect anything to the off-grid end of a wire.? The schematic editor uses integers for location, and grid points are every 16 integer values - which means there are 15 chances to get it wrong and miss the end of a wire that is not on-grid.

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You can hand-edit your .asc schematic file and move a wire's starting or ending points, making them off-grid.? It works.? Once in the schematic file, LTspice accepts it and leaves it off-grid when saved again.

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Andy

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Yes, that's why I wrote 'near'. For colouring traces, there is no use for '0', so it comes in useful for '10', and the other two colours are fairly easy to generate in the Settings.

IIRC, Black represents 0 on resistors. (Colour blind, but not _that_ colour blind!)

My favourite R was Brn-Blk-Orn

Donald.

On 3/10/25 15:17, Andy I via groups.io wrote:

On Mon, Mar 10, 2025 at 03:01 PM, John Woodgate wrote:

I'd like the default colours to nearly follow the resistor colour code, ...

That is essentially what I used too.? But I diverged somewhat from the resistor colour code sequence to make them more visible.??It is interesting that you use a light grey background for better contrast.? I should try that.? Thanks for the tip.

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but with black as 10, pink as 11 and cyan as 12, so I've set it up that way.

Does this mean you re-use black?? Or are they different shades for 1 and 10?

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Andy

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IIRC, Black represents 0 on resistors. (Colour blind, but not _that_ colour blind!)

My favourite R was Brn-Blk-Orn

Donald.

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Now I have it the other way round, white for schematics (so they print out that way), and light grey for waveforms to get better colour contrast. I'd like the default colours to nearly follow the resistor colour code, but with black as 10, pink as 11 and cyan as 12, so I've set it up that way.

On Mon, Mar 10, 2025 at 05:00 AM, John Woodgate wrote:

.... I have to print to .JPG, ...

I don't have a Windows driver to print to JPG.? I can print to PDF, and can go from there to a JPG or GIF or PNG but it's cumbersome.

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I forgot to mention that I always use a white background on my LTspice screen (light grey for the schematic screen).? I never liked the default black background for waveforms, so it is the first thing I change whenever installing LTspice.

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Andy

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Well, the message seems to be an executive order, not to be disobeyed. Perhaps it could be re-worded, like 'If your question is about a specific schematic, it can't be answered unless you upload the schematic (.ASC file) for examination. If it is not about a specific schematic, press POST again'

On Mon, Mar 10, 2025 at 06:12 AM, John Woodgate wrote:

So I tried. You can't use the word 'schematic' in a question without uploading a schematic! This is not sensible. I worked round it by writing 'circuit diagram' instead. Three cheers for British English!

On 2025-03-10 12:56, John Woodgate wrote:

Thanks, Tony. I will try.

On 2025-03-10 12:50, Tony Casey wrote:

You have to start a discussion and title it "Feature Request, or similar.

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Regards,Tony

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As someone who has to often ask for schematics, I wish that this was the case. :-) Actually, when you create any Engineer Zone post with LTspice as the product, as soon as you click Post, a pop-up appears asking for any related files — i.e. schematics, symbols, etc — since the vase majority of cases require one for debugging. Obviously, feature requests like this, do not. When you close that pop-up, it does not reappear, assuming you got the message. It is only a message, not a hard stop, though it looks like one. You do not need to remove instances of “schematic”, simply click Post again. Essentially, that is what you did, but you also changed your post to read “circuit diagram”.

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mike

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Michael Stokowski
LTspice Team
Analog Devices Inc.