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The .savestate directive? was introduced in version 24.1.0. I have existing files that worked with this directive. Now, when I try to run any transient simulation I get this error "argument not

You can always create an auxiliary behavioral voltage/current source with the desired expression and get the FFT of that output.

Is that*with* the incorrectly inserted curlies? Sent: Thursday, May 01, 2025 1:10 PM To: [email protected] Subject: EXTERNAL: Re: [LTspice] Possible g;itch in stepping parameters What I mean is you

What I mean is you would expect the parameters to just work. Latest LTspice produces this .meas result: Measurement: nc step ? ?{nCells} 1 ? ?35.8704181146 2 ? ?50.4427754736 3 ? ?84.071292456

.step voc=45 tnom = 27 temp = 27 method = modified trap .step voc=75 Measurement: nc ? step??? ncells ???? 1??? 35.8704 ???? 2??? 50.4428 ???? 3??? 84.0713 Measurement: nc2 ?

"Exactly as you expect ...". That's a tough one to define.? Care to elaborate, which way would be the "expected" one? Andy

Hi Dave, This works exactly as you expect in latest LTspice. Best Regards, Mathias

Hi And thanks all. I try Andy's procedure : - CTRL Click,..., ALT Double click and it works. Nice ! And thanks again. Bernard

It's a right-click. But it works only when the expression you want does not include any other node voltages or currents that were not already part of the FFT.? If you start with V(n001) and try

I guess I misremembered. -- This email has been checked for viruses by AVG antivirus software. www.avg.com

I don't recall if it's left or right click, but click on the fft label for the node your measuring and enter your own expression in the evaluator.

I tried that, and it did not work for me.? I plotted both V(n001,n007) and V(n001)-V(n007) in the waveform viewer, and then went to the FFT menu, but still got only the list of individual voltages

The easiest way to do that, is this: * Start with the FFT menu (View > FFT). * Highlight all of the node voltages or element currents that you wish to be used in your FFT formula.? (Hint: Use

If you plot V(n001)-V(n007)first, you can then get its FFT. -- This email has been checked for viruses by AVG antivirus software. www.avg.com

Hi all I use currently the FFT of single voltage or current and I would like to do the same with expressions like : V(n001)-V(n007) or other valid numerical expressions for instance in a current

With trap integration and the alternate solver the crossover voltage can be reduced to 70 V and it is barley able to run to completion. Plotting the voltage across the inductor shows the instability.

That should be crossover voltage. With a low crossover voltage the peak current through B1 is very high (500 W / crossover voltage) before the current starts to drop towards zero at the zero crossing

The required capacitance depends upon the crossover power setting of B1. If the crossover is increased to 50 then only 1 uF is needed. If the crossover is increased to 100 then no capacitance is

Eaglesea Adding a 100uf cap across B1 gets the simulation to run. I think the problem is an oscillation caused by putting a current source in series with an inductor. Dan

Interesting! Andy