LTspice XVII Co-exist with LTspice IV?
Can LTspice XVII Co-exist with LTspice IV on the same machine without conflicts?
...Jim Thompson
Web Site: <>
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Re: I'm ready to give up LTC all toghether.
I also do not understand why the characters do not have the required parameters. Many people come to rake because of this. Since LtspiceIV in the near future will not be updated (if ever updated), then you yourself can change the characters of A-type. I advise you to make a reserve of symbols changed. Then you will simply use logic gates. I think the default is to make the output levels 5V and td = 5ns, Trise = 2.5 ns.
Bordodynov.
15.08.2016, 16:13, "Gunoi Nare gunoiar@... [LTspice]" <ltspice@...>:
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Yes, Helmut, i saw it.
However, I was looking for a definition of Trise etc. that really does not exist in the help file..
From what level to what level is the simulator considering the rise of a signal?
Is Trise a .parameter , a key word or what?. How do you handle it' s substitutions.
i guess you understand .
BTW. If you leave unused pins of the gate just floating, how do you simulate latch-up conditions?
I belive that the digital lib has a lot to desire. Some standard values had to be plugged in the symbols so they would be imediattely usable. If the user needs to tweak them, so be it.
Is there a way for me to modify the lib so the components would have already some dummy values?
One more time, thank you.
g
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From: "helmutsennewald@... [LTspice]" <LTspice@...>
To: LTspice@...
Sent: Monday, August 15, 2016 9:29 AM
Subject: Re: [LTspice] Re: I'm ready to give up LTC all toghether.
Hello G.,
There is a more general description in the Help, but not exactly an example with your case.
Help -> LTspice XVII-> LTspice -> Dot Commands -> .PARAM
Best regards,
Helmut
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Re: I'm ready to give up LTC all toghether.
Hello,
>?BTW. If you leave unused pins of the gate just floating, how do you simulate latch-up conditions?
I guess you haven't heard about the idea of the digital A-devices. These devices should be as fast as possible in the simulation and only add small complexity. Unused pins should be left open. This allows the compiler to reduce a five-input AND to a two input AND when you only apply two signals.?
When you want simulate latchup, you have to create and a add subcircuit with a ?SCR structure. Before you waste time on that, you have to characterize the latchup behavior of the target IC.
Best regards, Helmut ?
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Re: I'm ready to give up LTC all toghether.
If you ever think that you have found something FREE, THINK AGAIN G
From: "iamrogerholden@... [LTspice]"
To: LTspice@...
Sent: Monday, August 15, 2016 10:11 AM
Subject: [LTspice] Re: I'm ready to give up LTC all toghether.
?
Don't do down one of the most brilliant pieces of freeware ever!
If you want exhaustive help files and training try paying lot's and lot's of $$$$ for a product.? As for myself and am sure many many others we don't have $$$$$ and rely on people such as those at Lt to give away there hard work for free for the benefit of others.? I think as you use it will grow on you...good luck :)
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Re: I'm ready to give up LTC all toghether.
Don't do down one of the most brilliant pieces of freeware ever!
If you want exhaustive help files and training try paying lot's and lot's of $$$$ for a product.? As for myself and am sure many many others we don't have $$$$$ and rely on people such as those at Lt to give away there hard work for free for the benefit of others.? I think as you use it will grow on you...good luck :)
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Re: I'm ready to give up LTC all toghether.
Yes, Helmut, i saw it. However, I was looking for a definition of Trise etc. that really does not exist in the help file.. From what level to what level is the simulator considering the rise of a signal?
Is Trise a .parameter , a key word or what?. How do you handle it' s substitutions. i guess you understand .
BTW. If you leave unused pins of the gate just floating, how do you simulate latch-up conditions?
I belive that the digital lib has a lot to desire. Some standard values had to be plugged in the symbols so they would be imediattely usable. If the user needs to tweak them, so be it.
Is there a way for me to modify the lib so the components would have already some dummy values?
One more time, thank you. g
From: "helmutsennewald@... [LTspice]"
To: LTspice@...
Sent: Monday, August 15, 2016 9:29 AM
Subject: Re: [LTspice] Re: I'm ready to give up LTC all toghether.
?
Hello G.,
There is a more general description in the Help, but not exactly an example with your case.?
Help -> LTspice XVII-> LTspice -> Dot Commands -> .PARAM
Best regards, Helmut
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Re: I'm ready to give up LTC all toghether.
Hello G.,
There is a more general description in the Help, but not exactly an example with your case.?
Help -> LTspice XVII-> LTspice -> Dot Commands -> .PARAM
Best regards, Helmut
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Re: LTspice XVII binary log files
Hello,
The log file is in ASCII text as usual.? Both files, the log-file and the raw-file are 100% the same as in LTspiceIV.?
You can change the raw-file format to ASCII in the Control Panel as usual. Tools->Control Panel->Compression
Best regards, Helmut
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Re: LTspice XVII binary log files
You might try doing a search of recent messages - this topic has been covered recently.
My recollection is that the log files are not binary (what use would that be?), but do now contain null characters (or similar) that confuse Notepad (easily done).
What happens if you open the log file from wihtin LTspice (Ctrl-L)?
Regards,
Tony
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Re: I'm ready to give up LTC all toghether.
G,
Calm down for five minutes and consider all those who had to design circuits without circuit simulators and nice assemblers to write machine code for them.
Dave N
From: LTspice@... [mailto:LTspice@...]
Sent: 15 August 2016 12:26
To: LTspice@...
Subject: [LTspice] I'm ready to give up LTC all toghether.
I'mready to give up LTC all toghether.
The only think that made me use ltC components was the simulator. These guys in their plush officess have no idea how important the simulato ris for their bussines. Otherwise they would had put some more muscle behind Mike.
i uploaded Draft 1.asc. I can not believe that such a simple think robbed me of an hour from my real work.
G.
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Re: I'm ready to give up LTC all toghether.
Thank you Helmut. Could you please point me to the place in the simulator help file that decribes what you have just done?
G. BTW. The program is newer guilty. The Programmer/Technical Writer, yes! G.
From: "helmutsennewald@... [LTspice]"
To: LTspice@...
Sent: Monday, August 15, 2016 9:04 AM
Subject: [LTspice] Re: I'm ready to give up LTC all toghether.
?
Hello, Since when is a program guilty when the user don"t know the syntax of parameter substitution. Do it right, then it will work.
trise={TRISE} vhigh={VHIGH}
See also my uploaded example Draft1_ok.asc.
Best regards, Helmut
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LTspice XVII binary log files
Hi,
I'm trying out LTspice XVII, and found that the log files are now binary. Is there any way to get text files instead?
Thanks
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Re: I'm ready to give up LTC all toghether.
Hello, Since when is a program guilty when the user don"t know the syntax of parameter substitution. Do it right, then it will work.
trise={TRISE} vhigh={VHIGH}
See also my uploaded example Draft1_ok.asc.
Best regards, Helmut
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Calculation of the inductance of the amplitude of the first harmonic voltage and current amplitude
Hello. See file Meas_Lx.asc in TEMP folder. It is considered an inductance (large signal), as I have shown in the example? From a plot of inductance on the current amplitude is seen maximum!
Bordodynov.
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I'm ready to give up LTC all toghether.
I'mready to give up LTC all toghether. The only think that made me use ltC components was the simulator. These guys in their plush officess have no idea how important the simulato ris for their bussines. Otherwise they would had put some more muscle behind Mike. i uploaded Draft 1.asc. I can not believe that such a simple think robbed me of an hour from my real work. G.
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Re: Analog Devices to buy LT!
hkah@... [LTspice] schrieb: found in LTspice XVII Help/Introduction/Software Installation:
Windows XP users can run LTspice IV, which is still be available in observance of Linear Technology Corporation's zero obsolence tradition.
1] LTspice IV is no longer updated. We will see. I don't think parallel updates won't hold for long. Thank you all. - H.
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"I need to BRF91 LTSPice
model...
"
On the presumption that you misspelt the part name (that doesn't
help when searching) and you actually mean BFR91, you might find
this helpful:
.MODEL? BFR91A?? NPN(
+????????????? IS = 1.32873E-015
+????????????? BF = 1.02000E+002
+????????????? NF = 1.00025E+000
+???????????? VAF = 5.19033E+001
+???????????? IKF = 8.15511E+000
+???????????? ISE = 1.39029E-014
+????????????? NE = 1.51292E+000
+????????????? BR = 1.76953E+001
+????????????? NR = 9.94038E-001
+???????????? VAR = 3.28032E+000
+???????????? IKR = 1.00000E+001
+???????????? ISC = 1.04297E-015
+????????????? NC = 1.18993E+000
+????????????? RB = 1.00000E+001
+???????????? IRB = 1.00000E-006
+???????????? RBM = 1.00000E+001
+????????????? RE = 7.63636E-001
+????????????? RC = 9.00000E+000
+????????????? EG = 1.11000E+000
+???????????? XTI = 3.00000E+000
+???????????? CJE = 2.03216E-012
+???????????? VJE = 6.00000E-001
+???????????? MJE = 2.90076E-001
+????????????? TF = 6.55790E-012
+???????????? XTF = 3.89752E+001
+???????????? VTF = 1.09308E+001
+???????????? ITF = 5.21078E-001
+???????????? CJC = 1.00353E-012
+???????????? VJC = 3.40808E-001
+???????????? MJC = 1.94223E-001)
Note: these are only the parameters of the bare die, which may be
adequate many purposes. This is the Philips (NXP) model, last
updated in 1992. As far as I can tell, the old 3 legged "T-pack"
BFR91 has not been available for some years, but the same die is
still available as the BFR93A in a more useful SOT-23 package, and
others. If you are doing serious RF simulation, you will need to
add the package parasitics. You can find the subcircuit for
BFR93A, which also includes the above model, on the NXP website:
Regards,
Tony
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Hello.
I have a model (subckt) transistor ne85619(2SC5006).
Bordodynov.
15.08.2016, 09:28, "ali_electronic_2006@... [LTspice]" <ltspice@...>:
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Hello
I need to BRF91 Ltspice model...
I found this topic:
Third-party Model
Third-party Model
Third-party Models This section explains the basics to adding a third-party model to LTspice IV.
View on ltwiki.org
Preview by Yahoo
but I can't find all parameters in its datasheet!
thanks
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Re: Piece-wise voltage signals
This is a math question, not about simulation, but someone may give you a hint on how to do it. One way would be to use Fourier analysis, but it would not give you a usable result, indeed no usable result may exist. ? With best wishes DESIGN IT IN! OOO ¨C Own Opinions Only J M Woodgate and Associates Rayleigh England ? Sylvae in aeternum manent. ?
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From: LTspice@... [mailto:LTspice@...]
Sent: Monday, August 15, 2016 8:55 AM
To: LTspice@...
Subject: [LTspice] Piece-wise voltage signals? ? Hi guys,
First of all, congratulations on your recent milestone! I think I must have been very close to the exact 60000th member.. I have used LTSpice all the way through my education as an alternative to the prescribed SIMetrix (mostly due to running into their free node limit), and despite the steep learning curve, have found it an absolute joy to use and show off to my peers. So this is just a brief expression of appreciation to the developers, I don't understand how/if you make any money out of this and would be happy to contribute via a paypal donation (if such an option exists).
On to my question; I've been successfully create a custom signal for simulation using Excel to generate the points to a PWL file. What follows is a brief description of the signal (not that important, feel free to skip it).
The signal has a ramp up to a maximum voltage for the first section, then after a short delay drops sharply to a low voltage and holds for a short delay, then charges exponentially to a an intermediate voltage and holds for a short delay, then finally drops sharply to the low voltage again. The signal has a relatively long dead time in-between starting and repeating itself?
What I'd like to do, is write an exact formula for the above. So far I can write a formula for each single section and make that repeat itself, but I'm at a loss as to how to piece it all together.
Any ideas?
Thanks ? ?
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Re: Piece-wise voltage signals
Hi.
Use the series connection of voltage sources. What formulas are as many voltage sources. Use a non-linear voltage-dependent sources - B.
Bordodynov.
15.08.2016, 11:15, "spangenbergjack@... [LTspice]" <ltspice@...>:
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Hi guys,
First of all, congratulations on your recent milestone! I think I must have been very close to the exact 60000th member.. I have used LTSpice all the way through my education as an alternative to the prescribed SIMetrix (mostly due to running into their free node limit), and despite the steep learning curve, have found it an absolute joy to use and show off to my peers. So this is just a brief expression of appreciation to the developers, I don't understand how/if you make any money out of this and would be happy to contribute via a paypal donation (if such an option exists).
On to my question; I've been successfully create a custom signal for simulation using Excel to generate the points to a PWL file. What follows is a brief description of the signal (not that important, feel free to skip it).
The signal has a ramp up to a maximum voltage for the first section, then after a short delay drops sharply to a low voltage and holds for a short delay, then charges exponentially to a an intermediate voltage and holds for a short delay, then finally drops sharply to the low voltage again. The signal has a relatively long dead time in-between starting and repeating itself
What I'd like to do, is write an exact formula for the above. So far I can write a formula for each single section and make that repeat itself, but I'm at a loss as to how to piece it all together.
Any ideas?
Thanks
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Tony Casey