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This is a really nice theory, but at least for me the lengthy looping experience also happens when I look at already finished .raw files. -marcel

Does the second stage oscillate if you take out the parts that cause it to sweep? How are you doing that modulation anyway? Best wishes John Woodgate OOO-Own Opinions Only J M Woodgate and Associates

Hi Bordodynov, Please don't be offended. I appreciate all the work you did, and can see it was a lot of work. My case: A simple reverse engineered PCB that I put into ltspice simulation. The PCB has

If you are really convinced that these are aspects of LTspice that can and should be improved, then (politely, of course) send your reasoning to Mike E. directly at the address found in Help =>About.

Vlad, First I want to say how much I appreciate your contribution to this forum and the excellent advice you have given all of us over many years. Likewise, I am grateful to Linear/Analog Devices for

Vlad wrote: I agree completely. For anything but a fairly trivial transient simulation, I always turn off marching waveforms, and never encounter the problem. However, before Mike improved the

Hello Dan While I can think of reasons one might want to do that, I also have to wonder about doing that in other simulators. At the same time, I also wonder what LTspice needs to do in order to

Thanks for that tip. Yes, it will sometimes stop the endless loop of painting to minimize the viewer window. That will allow the simulation to continue if it isn't already frozen. But once the

Hi Dan, I believe LTspice uses Windows 2-D graphics function calls for the Waveform Viewer. Almost all newish graphics cards or ICs accelerate these in hardware. If not Windows uses the CPU to do the

Dan, I mentioned this only because I have seen (sometimes) that when I switch back to LTspice, it proceeds unfrozen after the brief switch to task manager. That could have purely coincidental. But

No, it stays at 0% CPU usage in the task manager for as long as I am willing to wait. Dan

I am not alone then! However, for me it *only* happens when 'Mark Data Points' is on. (I don't do long simulations with marching waveforms as that increases wall-clock time by a factor of 2-3.) As

Just a hunch... what happens if you r-click on the task bar and start Task Manager. Then go back to LTspice. Does it unfreeze? ________________________________ Sent: Friday, January 4, 2019 1:39:18 PM

Thank you very much. I suppose for the RC-type oscillator, one can set the capacitor voltage. Best wishes John Woodgate OOO-Own Opinions Only J M Woodgate and Associates www.woodjohn.uk Rayleigh,

You have my sympathy, worth USD0.0001.? First, can you upload an .ASC and the other files required to run it to Files => Temp? That can help a very great deal.? Regarding 'stupid', a long transient

See osc.zip in TEMP folder. There is another way: set the initial current in the inductance. Bordodynov. 04.01.2019, 21:45, "John Woodgate jmw@... [LTspice]" : So don't hold out on us. How do

The latest version of XVII on Windows 10 still freezes. I have been able to reproduce one kind of freeze at will by starting a long transient simulation. Then I select various waveforms in the viewer.

So don't hold out on us. How do you kick the simulated 4069UB into oscillation? Best wishes John Woodgate OOO-Own Opinions Only J M Woodgate and Associates www.woodjohn.uk Rayleigh, Essex UK

True. Just call it an amplifier. -Craig [LTspice] <LTspice@... wrote:

Hello Andy. When you know and understand what you are doing - it is done easily. Bordodynov. 04.01.2019, 20:52, "Andy ai.egrps@... [LTspice]" <ltspice@...>: Winold wrote: "It will