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Le ven. 7 févr. 2025 à 11:12, John Woodgate a écrit : > > I am basically looking for how to optimize (calculate) the value of RS to > obtain a minimum output ripple r2.

There is hardly any current in your 7.5 V Zener because there is only about 5 V DC across it. Is that what you intend? Disconnecting the Zener makes almost no difference to the voltage at node 2. --

In Stretch mode, a selected component, or a block of components, can be moved while all its connections are kept. This is sometimes called 'rubber-banding'. Try selecting a component and moving it

Yes, that's what I meant; I put 'output number',? instead of 'output/input ratio'.

Hello, See my diagram " Stabilisateur Zener.asc " Everything is written in comments in this diagram. I would like to know if the smoothing of the sinus current is indeed in the indicated ratio. Your

Hi, I installed LTspice64 ver 24.0.12 for Windows. Compared to the old LTspiceIV in the on top menu I can see "Duplicate mode, "Move mode" and "Stretch mode". How is the last mode (i.e. stretch mode)

Actually, it does not.? If you still see "This is ground", then you are not seeing that schematic in the right context! I think there are two ways that can happen: (1) If you opened the schematic

Bear in mind that FETs can have huge variation from part to part.? For example, looking at onsemi's datasheet, they show a 12:1 variation in transconductance between typical and minimum, and the

Adding a couple more observations -- John Woodgate wrote: What John wrote above, might be misunderstood.? Setting the source's amplitude makes a big difference to the output amplitude.? But it makes

Paul, Although I think it is a wise choice to "downgrade" to an older version of LTspice at this time, as you did, I also want to point out that the differences between the two plots are only a small

By the way, nonlinear ferrite bead models are somewhat rare.? It is hard enough giving them the right characteristics vs. frequency.? To add nonlinearity (vs. current) on top of that, would be

Your best bet, at the moment, is to dump 24.1 and revert back to 24.0.12. It's usually wise to hang back on "upgrades" if you're doing critical work and haven't any issues with the version you're

As John noted, SPICE's .AC analysis is strictly linear.? It will not show any change versus either DC bias, or AC amplitude.? To see those changes in simulation, it must be a .TRANsient analysis,

Well, now, your.ASC doesn't work because you haven't uploaded the symbol BSS84z, and if it needs a model to go with it, that needs to be uploaded as well.

LTspice can't simulate .png files! Please upload your files (.asc and any models&libs&... that aren't included in the LTspice installation) all zipped (.zip, please) together to the Temp directory so

" I'm afraid you're not going to be the only person inconvenienced. LTspice 24.1 has broken all schematics that use: 74HC.lib 74HCT.lib 74HC_v.lib 74HCT_v.lib CD4000.lib CD4000_v.lib 74LVC1G.lib" Has

I'd be happy just to get Vds - Id? at various Vgs to sorta correspond to the Diodes Inc datasheet ATM

I'm suitably reprimanded Messrs Woodgate & Casey.? Mea culpa, mea culpa, mea Maxima Culpa! I've put my test jig and results in Files & Phots At the moment, I'm just trying to get Vds - Id sorta OK at

Re your 'other question', you need to use .TRAN simulation instead of .AC,? which, as I tried to explain, doesn't work with actual voltages and currents, only ratios. It also assumes linearity, so

Hi Andy, I got it working using the ctrl right-click and did change Prefix to X and put the subckt name in correctly and the simulation worked. I will read later tonight how to post a picture of the