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Re: "Official" LTspice IV blog
--- In LTspice@..., "Tony Casey" <tony@...> wrote:
Hello Tony, Thanks for this link. I placed a link to it in our Links-section. Best regards, Helmut |
"Official" LTspice IV blog
I would venture to suggest that many people are unaware, as I was, that Linear Technology now has an official LTspice IV blog. This covers some of the frequently asked questions we get here, and is supported by several "Howto" videos.
Perhaps a link could be put on this group's homepage, although it runs the risk of simply adding to the list of resources people don't bother to use. Oh, you can find it here: Regards, Tony |
Re: I am using LTSpice for simulation of Buck and Buck-Boost converter. Is there a
--- In LTspice@..., "Michael" <friendofwisdom@...> wrote:
Hello, You can use the MEASURE-commands to find when the time when voltage reaches a certain value. Please take a look .MEASURE in the help pages of LTspice. There are some examples using .MEASURE in our Files section. Files > Tut > MEASURE Best regards, Helmut |
I am using LTSpice for simulation of Buck and Buck-Boost converter. Is there a
I am using LTSpice for simulation of Buck and Buck-Boost converter. Is there a way to find the 90 percent points of the output voltage curves I obtain as I want to calculate the time delay of the output voltage stabilising as I change the input voltage
Thankyou |
Re: Help with E and G parts
I found an ok solution. It is to use "B" parts, and terminate the wires that I would have used as inputs to the E parts with resistors and node names. I can address these node names in the window they give you for the B part; "V= blah". Not as intuitive to understand when someone studies my schematic, but it works.
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-Andy --- In LTspice@..., Jim Wagner <wagnejam99@...> wrote:
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Re: Help with E and G parts
Hi Andy -
Yes, you can have expressions. Actually, the Help will tell you a lot about this, including syntax and available functions. Look in the section on E parts. I find it a bit obtuse to get to but search around a bit. Jim Wagner Oregon Research Electronics On Aug 2, 2013, at 6:47 PM, a2n14d63y wrote: Hi All, [Non-text portions of this message have been removed] |
Help with E and G parts
Hi All,
I'm transitioning from Msim Pspice to LTspice. Is there any way to do the following: In Pspice, I could have an E or G part and have a math expression inside which could operate on the voltages of the input pins (e.g. V(%in2) was the voltage on the 2nd input pin). Is there a way to do that in LTspice? It seems to accept only expressions for the GAIN, applied to the voltage difference between the two input pins. I think I can accomplish that if I were to type directly into the netlist something like E 1 0 value=(blah) ...where "blah" is the expression for the voltage at the output. However, I'm working with a schematic, where my E part is a symbol, and I'm not sure how to tell LTspice how to take the expression "blah" I enter into its "value" line and enter it into the netlist as E 1 0 value=(blah) ...rather than E 1 0 c1 c2 <gain> Any thoughts? Thanks, Andy |
Re: Shot Noise Contributions From DC Currents
cbayona
No problems here;
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Win7 X64 Chrome browser, the latest version. At 03:21 PM 8/2/2013, you wrote:
When I try to download any of the files from I get a document not found message. Any ideas? --
Cecil - k5nwa < > < > Never take life seriously. Nobody gets out alive anyway. |
Re: Comparison between TI's Filterpro and LTSpice
Hello Jerry,
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The opamp's output was in the saturated region instead of the linear region. I tried his example with the additional negative supply voltage and discovered that the opamps oscillate. I have then used the 4 digit values for all the resistors as shown in the datasheet. Now it seems to be OK. Files > Temp > bandpass1750.asc Best regards, Helmut --- In LTspice@..., Jerry Lee Marcel <jerryleemarcel@...> wrote:
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Re: Comparison between TI's Filterpro and LTSpice
You must run an AC analysys to see the frequency response.
Your settings for transient analysis must be wrong - showing huge spikes at the output. Le 02/08/2013 11:08, resetpin a ¨¦crit :
[Non-text portions of this message have been removed] |
Re: Plans for more directories on search path? (I know, tired old subject)
Hello Andy,
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I agree with Alzie regarding the problem with the place of the symbols. They have to be in the folder of the the design or anywhere below lib\sym at the moment. One would not only need a path to the models. One would also need a path to the symbols to conveniently solve your "problem". Best regards, Helmut --- In LTspice@..., "a2n14d63y" <andydraudt@...> wrote:
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Re: Comparison between TI's Filterpro and LTSpice
Are you still having problems after replacing the opamp with the generic
type? Le 02/08/2013 11:08, resetpin a ¨¦crit :
[Non-text portions of this message have been removed] |
Re: Plans for more directories on search path? (I know, tired old subject)
Thanks Helmut,
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I'll write to Mike. Let's see, your solution (..speaker.lib) would require that the netlists of my models be placed in a .lib text file, yes? That would prohibit the viewing of the parts schematics by right-clicking on their symbol in the top level schematic, yes? If I'm wrong, please let me know! rgds, Andy --- In LTspice@..., alzie <alzie@...> wrote:
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Re: Shot Noise Contributions From DC Currents: Oops!
Hmm, I reworked my way through the files directory and it worked this time.
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--- In LTspice@..., "odarren" <odarren@...> wrote:
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Re: Shot Noise Contributions From DC Currents
When I try to download any of the files from I get a document not found message. Any ideas?
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--- In LTspice@..., "odarren" <odarren@...> wrote:
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Re: Plans for more directories on search path? (I know, tired old subject)
Hi Andy / Helmut
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Ive had a similar issue, example: I put my libs into: c:\users\username\LTspice4\lib My ckt sub dirs are just below c:\users\username\LTspice4 c:\users\username\LTspice4\cktname Then i use .include ..\lib\libname.lib up one dir and down into the lib dir for the lib files / search. That way i can have all of my models / subckts in one place. Doesnt for for symbols :-( they still want to be in the program files path. Al D. On 08/02/2013 03:32 PM, Helmut wrote:
If you don't need that everybody can run your designs out --
AC2CL I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success... Such emotions make a man forget food, sleep, friends, love, everything. - Nikola Tesla |
Re: Plans for more directories on search path? (I know, tired old subject)
--- In LTspice@..., "a2n14d63y" <andydraudt@...> wrote:
Hello Andy, If you don't need that everybody can run your designs out of the box, you could use an absolute path for your includes. .lib C:\mymodels\speaker\speaker1.lib I admit that this is not a really good solution. You could send an email to Mike with your wish. His email address is given in the Help -> About of the LTspice program. Best regards, Helmut |
Plans for more directories on search path? (I know, tired old subject)
Hi All,
I'm new and trying to migrate from Msim Pspice over to LTspice. My big problem is with part libraries and directory search paths. I do electro-mechanical-acoustic (thermal?) lumped element models using spice, and have many schematics I've made for parts (e.g. combustion model, speaker, alternator, nonlinear springs etc.). These get added to designs of larger systems. In Pspice I could put my models into a directory and tell the program where to look for those parts. This is convenient, since my system-level projects were in many different project directories, and it would be absurd to copy all my part schematic files (about 50 parts) into each project directory. It seems that is not possible in LTspice, and I'd have to dump all my parts into the "sub" directory of the LT install tree? So, my question is - are there plans to allow LTspice to address schematics stored in directories other than the current one or the LT install tree? Thanks! -Andy p.s. I want the parts to remain as schematics, rather than being just stored as netlists in a lib, because they need to be graphically presented and tweaked regularly. |
Re: How to change plot dimensions?
That did it! Thanks.
a simple 1e6*V(inoise)/1V*sqrt(1Hz) does make the plot 'dimensionless' with magnitudes in the expected range Small remaining point, if I try to shift the plot by adding, doesn't work as expected. for example, 1e6*V(inoise)/1V*sqrt(1Hz) and then 1e6*V(inoise)/1V*sqrt(1Hz)+10 does NOT shift the display upwards by 10 instead shifts upward by sqrt(sum(squares)), which makes sense, but doesn't do exactly what I expected. even adding parantheses to offset the calculation (1e6*V(inoise)/1V*sqrt(1Hz)) +10 still maintains the sqrt(sum) not a deal breaker, just interesting. --- helmutsennewald@... wrote: From: "Helmut" <helmutsennewald@...> To: LTspice@... Subject: [LTspice] Re: How to change plot dimensions? Date: Fri, 02 Aug 2013 14:49:49 -0000 --- In LTspice@..., Macy <macy@...> wrote:
Hello Macy, I didn't know how it works before. I tried and had luck. V(onoise)*sqrt(1Hz) Best regards, Helmut |
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