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Re: Warning: Multiple definitions of model ...

 

Tim wrote, "... The only way to observe the cat is to place the observer in the box and then the state of the system (its reality) is completely different because it is a different reality.? The observers quantum state is coupled with the cat in QFT."

But then the problem would be that if the poison is released, the observer dies too.? And then, since the observer did not observe the dead cat, is the cat still both dead and alive, until someone else opens the box?

What this has to do with reality (um, real reality?), I haven't a clue.? ;-)

Andy
Re: Filters (Butterworth, Chebychev etc.)

 

Tony wrote, "I didn't have any trouble downloading Filt.zip - must be something in your Firefox setup. ..."

I think the problem is that the LTwiki website uses http: (not secure https:) in many places.? That was a problem for the main LTwiki webpages too.? Currently, for me, the main LTwiki webpage (for information about LTspice) now uses https:, but the branches for Vlad's and Bordodynov's files still do not.? I don't use Firefox, but I guess Firefox (depending on its settings) might prevent you from downloading anything with an http: URL.? Google Chrome complains mightily, but if you are persistent and ignore all its warnings about it, you can get it to download from http: URLs.? Bit of a PITA.

Andy
Re: Warning: Multiple definitions of model ...

 

Sean Carrol tries to explain this here, at about 30 minutes in:????
Great bubblegum for the brain there.? I think he is saying position is a special limit that produces our classical interpretation of reality. Maybe reality is where the limit takes us into a linear region of the solution space, very much like the way LTspice linearizes our circuits to solve the differentials

Just keeping on topic here.? :-)

Tim

?
Re: Warning: Multiple definitions of model ...

 

¿ªÔÆÌåÓý

Perhaps this is why we sometimes refer to a "dead and alive place"? The doesn't mention quantum mechanics.

--
Regards,
Tony


On 12/07/2023 13:15, John Woodgate wrote:

Well, that is a sort of opposite to the cat. It's real, but so far inexplicable.

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)


On 2023-07-12 12:06, mhx@... wrote:
On Tue, Jul 11, 2023 at 07:43 PM, eewiz wrote:


And there lies "the (philosophical) flaw."

Nothing in this universe is instantaneous.
Analyses that assume any sort of instantaneousness are simply flawed to start  with.

[..]

Like quantum entanglement?

-marcel

Re: Warning: Multiple definitions of model ...

 

¿ªÔÆÌåÓý

I can't really comment on QSPICE as I haven't tried it. It's not clear how I can. I signed up for access to the beta test, but heard nothing more. I haven't joined the user group, either. But I'm not alone there - only 183 people have, so far. Nevertheless, good luck to them. Having competition is good.

As far as the need for speed is concerned: obviously it's not a bad thing, but people obsess too much about it. With crappy models that barely converge, the underlying speed of the simulator is irrelevant, anyway. I suspect people waste more time on fixing mistakes and not simulating the right thing than they can ever gain by using a faster PC or simulator.

Please - no more compliments. I must be hard enough to live with already. ? But, thanks.

--
Regards,
Tony


On 12/07/2023 12:27, Francesco wrote:

Tony, I'm with you almost 100%! The only questionable point may be QSPICE. I'm often conflicted between keeping LTspice as the only one, and invest time only there, or trying to spend some effort in checking QSPICE. I think it has some strength against LTspice, but honestly, do we really need it? I think someone like you should take part in the evaluation of this new tool, in case even to decide it does not make sense to shift on it. But I agree, if you feel good with LTspice (as I do), why should you move from it? Nevertheless, the higher speed and some other features of QSPICE are attracting. I think it is still in a preliminary phase, probably too early for one like you to invest time in it. Just thoughts.

My compliments for your wonderful English! I like reading your posts even for learning some language usage! Thanks for teaching.
Re: Loss simulation problem

 

¿ªÔÆÌåÓý

Yes, the apologies should be mine. It was clear that English probably wasn't your first language - I wouldn't attempt anything in Hungarian. But sometimes I can't resist.

Thanks for your upload, but please, next time use zip only, as per the instructions on the homepage. The reason we ask for zip is that every computer can access them? without installing and using additional utilities.

I tried your schematic, and I can plot the dissipation of both MOSFETs, Q1 and U1. Please check your settings against Save_Defaults. This is what I got: Waveforms.

--
Regards,
Tony


On 12/07/2023 12:55, Csizmadia Mikl?s wrote:

You are right. I apologize, I am writing from Hungary. My English is, um... But you get the point (:

Even if I put the cursor on the semiconductor, it doesn't turn into a thermometer.

I checked the setting, and it's okay.

The example file you can find here: /g/LTspice/files/Temp/3878_temp_test.rar
Re: Warning: Multiple definitions of model ...

 

You have to think about it the other way around.? One doesn't open the box and observe the cat.? The only way to observe the cat is to place the observer in the box and then the state of the system (its reality) is completely different because it is a different reality.? The observers quantum state is coupled with the cat in QFT.
Re: Warning: Multiple definitions of model ...

 

¿ªÔÆÌåÓý

Well, that is a sort of opposite to the cat. It's real, but so far inexplicable.

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)


On 2023-07-12 12:06, mhx@... wrote:

On Tue, Jul 11, 2023 at 07:43 PM, eewiz wrote:


And there lies "the (philosophical) flaw."

Nothing in this universe is instantaneous.
Analyses that assume any sort of instantaneousness are simply flawed to start  with.

[..]

Like quantum entanglement?

-marcel

Re: Warning: Multiple definitions of model ...

 

On Tue, Jul 11, 2023 at 07:43 PM, eewiz wrote:

And there lies "the (philosophical) flaw."

Nothing in this universe is instantaneous.
Analyses that assume any sort of instantaneousness are simply flawed to start with.
[..]

Like quantum entanglement?

-marcel
Re: Loss simulation problem

 

You are right. I apologize, I am writing from Hungary. My English is, um... But you get the point (:

Even if I put the cursor on the semiconductor, it doesn't turn into a thermometer.

I checked the setting, and it's okay.

The example file you can find here: /g/LTspice/files/Temp/3878_temp_test.rar
Re: Warning: Multiple definitions of model ...

 

Tony, I'm with you almost 100%! The only questionable point may be QSPICE. I'm often conflicted between keeping LTspice as the only one, and invest time only there, or trying to spend some effort in checking QSPICE. I think it has some strength against LTspice, but honestly, do we really need it? I think someone like you should take part in the evaluation of this new tool, in case even to decide it does not make sense to shift on it. But I agree, if you feel good with LTspice (as I do), why should you move from it? Nevertheless, the higher speed and some other features of QSPICE are attracting. I think it is still in a preliminary phase, probably too early for one like you to invest time in it. Just thoughts.

My compliments for your wonderful English! I like reading your posts even for learning some language usage! Thanks for teaching.
Regards
Francesco
Re: Loss simulation problem

 

¿ªÔÆÌåÓý

I'm always losing transistors, too. I have no idea why - maybe I'm just forgetful. ?

I think you probably mean power dissipation.

If the thermometer doesn't appear, can you still plot currents of the transistor? If you can't plot currents either, check that:

Control Panel > Save Defaults > Save Device Currents

.. is checked.

If it is, perhaps you can upload a troublesome schematic where you can't plot dissipation?

--
Regards,
Tony


On 12/07/2023 11:33, Csizmadia Mikl?s wrote:

is it only me who finds it strange (or does it not work )that the loss of transistors cannot be simulated? I can't see the little thermometer. Does this function not work for you either?
Loss simulation problem

 

Dear all,
?
is it only me who finds it strange (or does it not work )that the loss of transistors cannot be simulated? I can't see the little thermometer. Does this function not work for you either?
Re: Filters (Butterworth, Chebychev etc.)

 

¿ªÔÆÌåÓý

Thanks for uploading the file. As said, I got it meanwhile. And thanks for pointing out LTSPIC¡¯s builtin filter functions.

¡ª
Christoph


Am 12.07.2023 um 10:36 schrieb Tony Casey <tony@...>:

I didn't have any trouble downloading Filt.zip - must be something in your Firefox setup. Perhaps you are using the HTTPS Everywhere add-in? You can disable the "https only" option, or temporarily disable the add-in.

If you still can't download it, I have placed it in Files > Temp, Filt.zip.

Don't forget, there are also 2nd order filter functions in the LTspice pre-installed libraries:

Place Component (F2) > SpecialFunctions

--
Regards,
Tony



On 12/07/2023 09:08, Christoph wrote:
I would like to apply filters to a signal of discrete sample points and watch the effect of order, gain and other characteristics.
Found this page:


Firefox refuses to download the files (e.g. Filt.zip at the bottom of the page) since the links aren¡¯t secured. Any alternatives?
Re: Filters (Butterworth, Chebychev etc.)

 

¿ªÔÆÌåÓý

I didn't have any trouble downloading Filt.zip - must be something in your Firefox setup. Perhaps you are using the HTTPS Everywhere add-in? You can disable the "https only" option, or temporarily disable the add-in.

If you still can't download it, I have placed it in Files > Temp, Filt.zip.

Don't forget, there are also 2nd order filter functions in the LTspice pre-installed libraries:

Place Component (F2) > SpecialFunctions

--
Regards,
Tony



On 12/07/2023 09:08, Christoph wrote:

I would like to apply filters to a signal of discrete sample points and watch the effect of order, gain and other characteristics.
Found this page:


Firefox refuses to download the files (e.g. Filt.zip at the bottom of the page) since the links aren¡¯t secured. Any alternatives?
Re: Filters (Butterworth, Chebychev etc.)

 

¿ªÔÆÌåÓý

Now got one of these filters into my circuit. Anyone familiar with these models??
How do I have to set the parameters for a low pass filter, of, say, corner freq. = 100Hz?

´Ü¾±²Ô=&±ô³Ù;-1,0,0+..¡Þ&²µ³Ù; ¦¸ Input impedance. There are three possible settings:
  • Zin=-1 ? zero-impedance input (voltage source)
  • Zin=0 ? high-impedance input (current source)
  • Zin>0 ? µ÷´Ü¾±²Ô°¨¦¸
´Ü´Ç³Ü³Ù=&±ô³Ù;0,0+..¡Þ&²µ³Ù; ¦¸ Output impedance. There are two possible settings:
  • Zout=0 ? high-impedance output (floating)
  • Zout>0 ? µ÷´Ü´Ç³Ü³Ù°¨¦¸ output
Only one of the impedances can be zero at a time!
fp1, fs1, fp2, fs2 Hz Corner frequencies for the passband and stopband, defaults <500,400,2k,2.5k>
BWp, BWs, fc Hz Alternate frequency settings: passband bandwidth, stopband bandwidth, and center frequency, defaults are calculated based on the corner frequencies and, based on those, <1.5k,2.1k,1k>
As dB Stopband attenuation, default 40
Asc dB Frequency-scaling attenuation. If Asc=0, N>0 the passband is optimized. Default 3.0103
N=<0:1:32>
N=<0:2:64>		 - Order of the filter, its value represents the order after the frequency transformations. For lowpass and highpass the maximum order is 32 and can take odd and even values. For bandpass and bandstop it's 64, but only even values are valid. If N=0 and Asc>0, the minimum order is determined based on the values of the frequencies and attenuations. Default 13
sim s Total .TRAN simulation time, default 1
Rpar, Rser ¦¸ LTspice's specific for inductors and capacitors, common for both (i.e. setting Rser means inductors and capacitors, together, will have it set, same for Rpar), defaults <1g,0>

¡ª
Christoph

Am 12.07.2023 um 09:39 schrieb Christoph <kuku@...>:



Am 12.07.2023 um 09:08 schrieb Christoph <kuku@...>:

I would like to apply filters to a signal of discrete sample points and watch the effect of order, gain and other characteristics.
Found this page:


Firefox refuses to download the files (e.g. Filt.zip at the bottom of the page) since the links aren¡¯t secured. Any alternatives?


OK, I managed to download the Filt.zip file using?

$?wget


¡ª
Christoph
Re: Filters (Butterworth, Chebychev etc.)

 

¿ªÔÆÌåÓý



Am 12.07.2023 um 09:08 schrieb Christoph <kuku@...>:

I would like to apply filters to a signal of discrete sample points and watch the effect of order, gain and other characteristics.
Found this page:


Firefox refuses to download the files (e.g. Filt.zip at the bottom of the page) since the links aren¡¯t secured. Any alternatives?


OK, I managed to download the Filt.zip file using?

$?wget


¡ª
Christoph
Re: Warning: Multiple definitions of model ...

 

¿ªÔÆÌåÓý

Of course I agree: it's the mathematics that accepts instantaneous change, leading to a paradoxical result. Just like the mathematics accepts the paradoxical result? 'simultaneously alive and dead', but the real world doesn't.

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)


On 2023-07-12 07:43, eewiz wrote:

Hello All

John Woodgate wrote:
Consider a theoretical square wave, varying between -1 and 1 with instantaneous transitions.
And there lies "the (philosophical) flaw."

Nothing in this universe is instantaneous.
Analyses that assume any sort of instantaneousness are simply flawed to start with.
If you disagree, perhaps I could sell you an instantaneous perpetual motion machine.

All for now
Filters (Butterworth, Chebychev etc.)

 

¿ªÔÆÌåÓý

I would like to apply filters to a signal of discrete sample points and watch the effect of order, gain and other characteristics.
Found this page:


Firefox refuses to download the files (e.g. Filt.zip at the bottom of the page) since the links aren¡¯t secured. Any alternatives?

¡ª
Christoph
Re: Warning: Multiple definitions of model ...

 

¿ªÔÆÌåÓý

Hello All

John Woodgate wrote:
Consider a theoretical square wave, varying between -1 and 1 with instantaneous transitions.
And there lies "the (philosophical) flaw."

Nothing in this universe is instantaneous.
Analyses that assume any sort of instantaneousness are simply flawed to start with.
If you disagree, perhaps I could sell you an instantaneous perpetual motion machine.

All for now
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