Thank you @Ludus Tonalis, why I did the current measurement is because it was a btl amp, en measuring only one half does give not the effect of this, maybe it does with two resistors and measure on the midle of them.
Now I now how that ,four works, thanks.
kees
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Wouldn't you just make L1 and L2 and tie the undotted end of L1 to the dotted end of L2?
Then connect the other ends to your circuit.
tommost
Hi all
What means deffcon in ltspice, when this happens I get a strange run in nS I think oscillation is the case here?
I get also no currents, nowhere only voltages when i do alternate, then it does run, but strange because voltages
are present the jef has to let see current, it has seen the voltages who do work properly.
pic fft is output chaos, it is not the first time i get trouble with the 64 bit version of LTspice, but maybe I do something wrong, this amp did work a while ago, and did nothing to change parts, so it has still have to work properly, so maybe something to learn here.
thanks
What means deffcon in ltspice, when this happens I get a strange run in nS I think oscillation is the case here?
I get also no currents, nowhere only voltages when i do alternate, then it does run, but strange because voltages
are present the jef has to let see current, it has seen the voltages who do work properly.
pic fft is output chaos, it is not the first time i get trouble with the 64 bit version of LTspice, but maybe I do something wrong, this amp did work a while ago, and did nothing to change parts, so it has still have to work properly, so maybe something to learn here.
thanks
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Defcon means the simulation is having trouble converging, that's why it slows down. It can be caused by many factors, often due to bad models.
tommost
Wel I have discover that when I do reset to default, it works again, so the set to gear, or alternat whataver can be give trouble.
Thw writer of this program did use defcon name he did read from the militairy? cute hehe, happenly he did not program a atomic bomb in it.
regards and thanks for help.
Thw writer of this program did use defcon name he did read from the militairy? cute hehe, happenly he did not program a atomic bomb in it.
regards and thanks for help.
Sometimes it can be hard to get the cursor away from the node voltage to the branch current, especially if the traces between components are short.
You can always run the simulation, right click on the waveform pane, select Add Traces from the dialog box, this will present you with a list of the node voltages and branch currents. Just select the one you want.
tommost
Wel I can not probe the mosfets from the library, al the other does work also the resistors and diodes.
I have never had this problem in al the years, and the circuits I mention about did always work, never problems, but after the last update, nothing does right it seems, the sk270 jfet for example from the standart models did not work anymore, no current flowing through it.
regards
I never heard of this problem, and I did LTSpice seminars for years... At this point I would uninstall and reinstall.
tommost
Make a behavioral voltage source (bv) equal to the difference between the 2 nodes you want to measure, label the output something you'll recall like OH_BEHAVE, and then run the simulation. Click on the waveform pane, then the View menu, then FFT, and you should see V(OH_BEHAVE) as a plottable choice.
tommost
Glad to help. LTSPICE is a marvelously capable program. During my tenure at Linear Tech I probably did about 2 or 3 LTSPICE seminars a year (not nearly as many as Mike E or as good but still a lot) and almost every time I learned something from the seminar attendees!
tommost
Alternatively, just use waveform arithmetric.
Suppose you have two nodes labelled out+ and out-. Perform a .tran simulation, right click on the waveform window, click View then FFT as normal. The dialogue box "Select Waveforms to include in FFT" opens. Note that Waveforms is in the plural.
Click on V(out+) to highight and select it. Then Control-Click V(out-) to additionally highlight and select it. Both voltages should now be selected. Click on OK.
A new dialogue box "Select Visible Waveforms" opens with the two selected waveforms showing. Alt-Double-Click on either of them and the Expression Editor opens. Adjust the displayed expression so that it reads V(out+,out-) and click on OK twice to display the FFT of the edited expression.
Note that you can only include a voltage or current in the final edited expression if it was pre-selected in the first "Select Waveforms to include in FFT" dialogue box.
Nice! I never did that before. This is what I meant by learning something new about LTSPICE all the time.
One of the features that often drew "oohs and ahhs" at seminars was schematic cleanup. When drafting you can draw lines right through a component and as soon as you leave drafting mode the short will get cleaned up & disappear. A lot of people never knew that.
tommost
Yes, and it works the other way round, too. If you place a component on a line that was drawn earlier, the bit of line under the component disappears.
...Yes, that's what I read in a how-to posted on one US University's EE website, with the directive as posted above . . . . but it doesn't yield the results that a real-world inductor does. I know, I had one in circuit on my bench.