Nice LTspice tutorial

Started by m II in sci.electronics.design6 years ago 1 reply

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 A nicely put together tutorial for a very helpful...

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 A nicely put together tutorial for a very helpful tool: http://denethor.wlu.ca/ltspice/ LTspice and manuals may be found here: http://www.linear.com/designtools/software/#LTspice It's a Windows program, but runs well on Linux,, using Wine. The latest version of LTspice was released June 21 2011 mike ...


PSpice and LTSpice

Started by petrus bitbyter in sci.electronics.design8 years ago 8 replies

Lately I got a PSpice listing that differs wildly from the LTSpice listings used by LTSpice. Anyone knows a way to convert from PSpice to...

Lately I got a PSpice listing that differs wildly from the LTSpice listings used by LTSpice. Anyone knows a way to convert from PSpice to LTSpice? petrus bitbyter


Strange LTspice Problem

Started by Jim Thompson in sci.electronics.design4 years ago 8 replies

Strange LTspice Problem... Received LTspice schematic (.ASC) from customer), all .ASY symbols in the same directory. Open schematic with...

Strange LTspice Problem... Received LTspice schematic (.ASC) from customer), all .ASY symbols in the same directory. Open schematic with LTspice, can't see any of the symbols. Clue: Doesn't balk and say can't find symbol... Any ideas? (I can't get a post to take on the LTspice list, so I've sent an E-mail to Helmut, as well as this post.) ...


SPICE help, please

Started by Robert Baer in sci.electronics.design6 years ago 37 replies

OK, the below listing is accepted by TopSpice (a DOS version) as well as LTspice (if the .OPTION card is commented out. LTspice takes a...

OK, the below listing is accepted by TopSpice (a DOS version) as well as LTspice (if the .OPTION card is commented out. LTspice takes a while to give a "result" (no curves in plot pane). I do not see how one can do an X.. in LTspice so i reverted to TopSpice. Q#1: How do i get this to work either version)? Q#2: How could one do this in "plain" LTspice? CODATRON EMULATION IN TES...


LTSpice simulator of my oscillator is far from reality; bad models?

Started by Clifford Heath in sci.electronics.design4 years ago 25 replies

Folk, Thanks to some good help here in the past, I have a nice clean oscillator (for my new fox transmitters), but I'm having trouble with...

Folk, Thanks to some good help here in the past, I have a nice clean oscillator (for my new fox transmitters), but I'm having trouble with the LTSpice simulation at higher frequencies. I'm assuming that the Intersil Spice model for the CA3046 is bad, and I know JT has a better one. Anyhow, I have two questions about the attached LTSpice schematic. 1) When I set it to 30MHz, LTSpice ...


Dumb LTSpice question - subckt model

Started by Anonymous in sci.electronics.design3 years ago 12 replies

I've never used a mfr model that was a subckt before; I've always added the .MODEL to the LTSpice library file, or edited an existing...

I've never used a mfr model that was a subckt before; I've always added the .MODEL to the LTSpice library file, or edited an existing device. This Vishay MOSFET has a more complex model though, and she ain't loadin' Jim. LTSpice says it can't find the model for M1. I even tried putting the definition right in the .asc, still no joy. I followed the LTSpice help info, as best I could. A...


LTspice XVII

Started by JM in sci.electronics.design1 year ago 8 replies

I just stumbled across LTspice XVII today - I never realised there had been any development post LTspice IV. Very glad to see some long...

I just stumbled across LTspice XVII today - I never realised there had been any development post LTspice IV. Very glad to see some long awaited improvements to the UI, especially the floating windows support. Give it a try!


LTspice, a great program, but that UI!

Started by rickman in sci.electronics.design8 months ago 133 replies

Every time I want to do something with LTspice I have to fight the UI something wicked. Doing anything relating to commands is pure...

Every time I want to do something with LTspice I have to fight the UI something wicked. Doing anything relating to commands is pure torture. I eventually figured out how to do what I wanted, but it is amazing how poor not only the UI is, but the documentation. I have learned programming languages by reading the manuals. But I can't decipher the .MEAS statement in LTspice along with m...


LTspice Loafing?

Started by rickman in sci.electronics.design7 months ago 64 replies

I was running some simulations on LTspice and it is not even using 5% of my CPU. Nothing else is topping it and the entire computer is pretty...

I was running some simulations on LTspice and it is not even using 5% of my CPU. Nothing else is topping it and the entire computer is pretty much at idle. What could be limiting the speed? One of the main reasons I bought a laptop with an i7 processor was to speed simulations. Is this wasted on LTspice or am I doing something wrong? -- Rick C


LtSpice something, strange happenings.

Started by Jamie in sci.electronics.design5 years ago 6 replies

I don't use Ltspice or any spice that much however, last night I pulled something out of my old sketch books and plotted it to LTspice, with a...

I don't use Ltspice or any spice that much however, last night I pulled something out of my old sketch books and plotted it to LTspice, with a little change with values to be used for a specific task. I noticed something strange. As you hover over the nodes, it is convenient to look at the lower left corner to get information about that node. Things like voltage, current etc. However, wi...


S-parameter curves in LTspice

Started by Jeroen Belleman in sci.electronics.design3 years ago 18 replies

Call me dense, but after many years of using LTspice, during which many times I inserted return-loss bridges into my circuits to measure S11,...

Call me dense, but after many years of using LTspice, during which many times I inserted return-loss bridges into my circuits to measure S11, someone pointed out to me that LTspice has a directive for that. Just insert ".net V1 v(out)" somewhere into the schematic, and an S11 trace will become available. I'm still missing some of the finer points however: The resulting S11 only makes se...


Wurth LTSpice Book

Started by JM in sci.electronics.design4 years ago 1 reply

There seem to be a lot of LTSpice users here, so I thought I'd mention that Wurth have recently published an LTSpice Applications Handbook. If...

There seem to be a lot of LTSpice users here, so I thought I'd mention that Wurth have recently published an LTSpice Applications Handbook. If you use Wurth parts I'm sure your local FAE will be happy to give you a copy. Details are here: http://we-online.com/web/en/electronic_components/produkte_pb/fachbuecher/Trilogie_1.php John


Running Multiple LTspice simulations

Started by Anonymous in sci.electronics.design4 years ago 8 replies

Is it possible to run multiple LTspice simulations simultaneously? These co= mputers have multiple processors and I don't know how optimized for...

Is it possible to run multiple LTspice simulations simultaneously? These co= mputers have multiple processors and I don't know how optimized for paralle= l processing LTspice is. I wonder if there would be much of a penalty for r= unning two simulations at the same time. Thanks


SUBCKT Declarations in LTspice?

Started by Jim Thompson in sci.electronics.design7 years ago 5 replies

Sent also directly to Helmut Sennewald... I have a whole chip design, relatively simple, simulates in 75 seconds in PSpice, that my customer...

Sent also directly to Helmut Sennewald... I have a whole chip design, relatively simple, simulates in 75 seconds in PSpice, that my customer would like made into a subcircuit for LTspice. Needless to say, this contains lots of CMOS, poly resistors and capacitors, and PNP's; from X-FAB process XC-06. Will LTspice accept .MODEL statements within .SUBCKT declarations? If so, it should ...


ltspice -- body effect and other matters

Started by Michael Robinson in sci.electronics.design7 years ago 11 replies

I need to be able to model a mosfet with values of L, W, Vth, Kprime, lamba and gamma, and I'm trying to figure out how to do this with...

I need to be able to model a mosfet with values of L, W, Vth, Kprime, lamba and gamma, and I'm trying to figure out how to do this with LTSpice. Looking at ltspice mosfet models, they don't have a separate value for K. They have Cgs, W and L. K is a function of Cgs, W, L, and electron mobility. So I could sort of kluge my own mosfet model by choosing Cgs so that K comes out just right. ...


LTSpice Simulation Hanging

Started by Tim Wescott in sci.electronics.design2 years ago 17 replies

LTSpice files not included because -- it's files, not file. So, I have a fairly complicated circuit in LTSpice. I'm playing some tricks on...

LTSpice files not included because -- it's files, not file. So, I have a fairly complicated circuit in LTSpice. I'm playing some tricks on an LT3757A -- basically I need an externally settable voltage output, so I'm hijacking the FBX line and driving it from an op-amp summing circuit. Everything was fine until I put that op-amp in there, but I suspect that I've just made the circuit t...


LTspice Symbols

Started by Jim Thompson in sci.electronics.design3 years ago 1 reply

Having attended an LTspice seminar yesterday in Arizona, and lunching with Mike Engelhardt (*), I learned a number of tricks... Main trick I...

Having attended an LTspice seminar yesterday in Arizona, and lunching with Mike Engelhardt (*), I learned a number of tricks... Main trick I learned is that it is trivial to make auto-generated symbols... so I will be gradually updating my Device Models & Subcircuits Page to include LTspice symbols (.asy) 8-) (Roughly 1/3 are done today... be aware that you will have to adjust model call...


LTspice E-mail Address List Hacked?

Started by Jim Thompson in sci.electronics.design5 years ago 5 replies

I don't know if the LTspice List has been hacked but I'm suddenly barraged with spam, like ~100 E-mails per day... sent to an address I use only...

I don't know if the LTspice List has been hacked but I'm suddenly barraged with spam, like ~100 E-mails per day... sent to an address I use only for LTspice. So I changed my address. (Easy for me, I maintain ~200 different E-mail addresses just to cope with such situations :-) (All junk sent from googlegroups... just what you'd expect :-) ...Ji...


How to use John Chan L in LtSpice?

Started by Maynard A. Philbrook Jr. in sci.electronics.design3 years ago 9 replies

How do I use John chan L model on the form in Ltspice? I can't seem to find a way to instruct LTspice to use it over the standard? ...

How do I use John chan L model on the form in Ltspice? I can't seem to find a way to instruct LTspice to use it over the standard? I looked for a model card to use but I don't see it what I was looking for? All it shows is how to do it in at the text file level, I want to do it on the form? Or do I need to write an include file for that specific L? If so, then I assume when ...


LTspice heads up

Started by Jim Thompson in sci.electronics.design2 years ago 20 replies

LTspice heads up... Latest LTspice sync release over-wrote many text-based subcircuits with encrypted versions. So back up all the...

LTspice heads up... Latest LTspice sync release over-wrote many text-based subcircuits with encrypted versions. So back up all the text-based ones before they disappear. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signa...