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Re: unknown parameter "wavefile"
John Woodgate
In message <94F7017DC15C44F7B9AF4FC9DE557E9E@KeithPC>, dated Wed, 21 Sep
2011, Keith Kawate <kkawate@...> writes: When trying to import a .wav file into a current or voltage source, IAccording to the Help, you can use 'wavefile' with I or V sources, B is not mentioned. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK When I point to a star, please look at the star, not my finger. The star will be more interesting. |
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Re: Monte Carlo beta and temp on 2N3904
Ganesan
The example MonteCarlo.asc suggests
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"mc(val, tol) is a function that uses a random number generator to return a value between val-tol*val and val+tol*val" It doesn't say what the distribution of "Val" would be (Gaussian, Uniform, Poisson,etc.)? Also no word on how the First Guess is made? Would different simulations result in different First Guesses? (If I run the simulation 10 times do i get 10 time the number of random samples or do i get 10 repetitions) Is there a comprehensive help anywhere on Monte Carlo Analysis? (Wiki and Help or nonos.) cheers AG On 9/21/2011 1:47 AM, Tony Casey wrote:
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Re: power bjt models
Thanks.
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--- In LTspice@..., Ganesan <dg1@...> wrote:
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Re: THAT VCA
Ganesan
Thanks to everyone.. It is a Chrome browser problem as John suspected.
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Cheers AG. On 9/21/2011 4:03 PM, John Woodgate wrote:
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Re: Half Bridge IRF7317 or Si4500BDY
Tony Casey
--- In LTspice@..., "pascalrenard85" <pascalrenard85@...> wrote:
Yes, Digikey have them both in stock. # IRF7317PBFCT-ND # SI4500BDY-T1-E3CT-ND (It always helps if you phrase a question unambiguously.) Regards, Tony |
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Re: THAT VCA
John Woodgate
In message <4E7A1C86.2080100@...>, dated Wed, 21 Sep 2011, Ganesan <dg1@...> writes:
Maybe I am not as abrasive as some?Nil carborundum!(;-) -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK When I point to a star, please look at the star, not my finger. The star will be more interesting. |
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Re: Monte Carlo beta and temp on 2N3904
Thanks Tony!
Your information worked perfectly. I guess the lesson here is never assign a constant to a "Monte Carlo" variable. Thanks again, AH ________________________________ From: Tony Casey <tony@...> To: LTspice@... Sent: Tuesday, September 20, 2011 11:47 PM Subject: [LTspice] Re: Monte Carlo beta and temp on 2N3904 ? --- In LTspice@..., Analog Hack <analoghack@...> wrote: Hello AH. You have successfully generated a Monte Carlo variable bf, but you don't reference it in your .model statement - bf is fixed at 300. Normally, curly braces are involved with parameters that are varied at run time, like this: .model 2N3904 NPN(bf={bf}) A a search of the Files section will reveal more information and several working examples. This should always be the first place you look for examples - there is a staggering number there. You might note, there is also an example supplied in the \Examples directory of the LTspice installation. It has also been discussed many times here - you could also check the message archive. Note, in your example, LTspice will complain about multiple instances of the same model, since the 2N3904 is already in standard.bjt. Using a different name is a good idea. Regards, Tony [Non-text portions of this message have been removed] |
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Re: struggling
Tony Casey
--- In LTspice@..., "ian.ballard@..." <ian.ballard@...> wrote:
Hello Ian, I think this question has been asked before, possibly in a round about kind of way. I'm afraid I'm not smart enough to have worked out whether LTspice has a way of indicating operation beyond the ratings of a device specified like this, e.g. diodes. I haven't found one. But then, you shouldn't be relying on this kind of feature. For starters, just because you're not running outside the maximum envelope of a device doesn't automatically mean you're within safe limits. Too much depends of the specifics of the application and the environmental conditions. In short, it comes down to the engineer to conduct due diligence. That's one of the (more important) things we get paid for. Regards, Tony |
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Re: THAT VCA
John Woodgate
In message <j5d5m9+b3qi@...>, dated Wed, 21 Sep 2011, Rick <sawreyrw@...> writes:
... unless AG's mouse click resulted in 'Internet Explorer is unable...'. Which can be caused by many things. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK When I point to a star, please look at the star, not my finger. The star will be more interesting. |
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Re: unknown parameter "wavefile"
--- In LTspice@..., "Keith Kawate" <kkawate@...> wrote:
Hello Keith, I have difficulties to read the wave-command above, because of "strange" characters. Maybe you have used a rare language code for text on your PC. Please try the example coming with LTspice. Does it work? C:\Program Files\LTC\LTspiceIV\Examples\Educational\waveout.asc C:\Program Files\LTC\LTspiceIV\Examples\Educational\wavein.asc Best regards, Helmut |
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Re: THAT VCA
Many thanks!
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--- In LTspice@..., "Helmut" <helmutsennewald@...> wrote:
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Re: THAT VCA
--- In LTspice@..., Ganesan <dg1@...> wrote:
Hello AG, Yes, the path has been correct. Only paths to directories are stable over time. One has to scroll down on this web-page to find the file. Direct paths to files are useless, because Yahoo can change these paths a minute later. Best regards, Helmut
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unknown parameter "wavefile"
When trying to import a .wav file into a current or voltage source, I get the SPICE error msg: Unknown parameter ¡°wavefile¡± in line: ¡°b1 0 n001 wavefile=<filename>¡± chan=0¡±. I updated my LTspice IV and still
get this error msg. Has anyone else encountered this problem and found a solution? [Non-text portions of this message have been removed] |
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Re: THAT VCA
Ganesan
I did click and couldn't find it... Hence the question? Maybe I am not
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as abrasive as some? On 9/21/2011 12:08 PM, Rick wrote:
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Re: THAT VCA
Ganesan
Helmut ,
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Is this the right path? Cheers AG On 9/21/2011 9:08 AM, Helmut wrote:
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Re: New Member and Updated Help File
Even Linear Technology provides a direct link to Twitter on the LTspice download page. That's pretty much the wild west of exposure.
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With a suitable disclaimer in the menu popup, it shouldn't be an obstacle to kicking the door open on an entire branch of documentation. That Wicki provides the missing elements that will jump start all the new user's eventually. Mike should reconsider. Tim --- In LTspice@..., Jim Wagner <wagnerj@...> wrote:
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Re: THAT VCA
Hello Jerry,
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I have uploaded an example with the 2180A. Files > Lib > 2180A_THAT_test.zip Best regards, Helmut --- In LTspice@..., "Helmut" <helmutsennewald@...> wrote:
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Re: Regarding Delay Element simulation
--- In LTspice@..., "dinesh" <dinsul1986@...> wrote:
Dinesh, Hera are my suggestions 1) Take an Electronics / circuit theory course 2) Take a semiconductor device course 3) learn to copy an existing schematics correctly 4) Tie Nwells (back gate of PMOS to the highest potential) 5) Try specifying device lengths in suitable units (say nm) - I think you have some 180 meter long gates 6) Work through some of the LTspice tutorials (learn the tool) 7) develop a few simple circuits OR if you just want to fix this schematic 8) add suitable AS, PS, AD, PD values to the device, i believe the defaults are zero for Ltspice using the default models, so as a consequence the Cgs and Cgd are also zero. You and Figure out what this means for the delay. Now please leave, because I find it personally very offensive that I am contributing to you getting a better grade than another hard working student who is really learning analog design. |
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Re: Regarding Delay Element simulation
I couldn't figure out ,what those output waveforms trying to say?ActuallyThis is beyond the scope of this email list, which is about LTspice, not about circuit design. You have a problem understanding circuit design, or how to use the circuits you are given. Ask your teacher for help. However, I will note a few things. 1. It looks unusual to me that the supply voltage is +1.8V yet you have +6V to VBIAS_P. Are you turning the upper PFET off, and why? What is the supply voltage reaching the diff-amp? 2. The PFETs are upside down. Their source pins should be up. Many MOSFETs are symmetrical so it might not make a difference electrically. 3. Based on the signal names and the name you gave to the schematic, when look at this schematic I think differential inputs and differential outputs. So why are you not driving it with a differential input signal? 4. Are you sure the input signal amplitudes should be 0V/+1V? 5. The outputs are clearly asymmetrical, a tip that something may be wrong. One swings <70mV, the other 130mV. That doesn't look right. And why are their amplitudes this small? Maybe the outputs are from capacitive coupling. Please do the needful and do your own homework. If you can't figure it out, then you seriously need to consider another field of study. Andy |
thutches
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