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Electronics Forum / CAD / September 2003HSpice to PSpice Library Converter Added to Webpage
An HSpice to PSpice CMOS Library Converter has been added to the Tool page of my website. (Courtesy of Brian Hirasuna of the Cadence PSpice Support Team.) ...Jim Thompson | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. > An HSpice to PSpice CMOS Library Converter has been added to the Tool > page of my website. (Courtesy of Brian Hirasuna of the Cadence PSpice > Support Team.) > > ...Jim Thompson they threw you a bone to draw your attention away from those bug reports you submitted? ;-) mike >> An HSpice to PSpice CMOS Library Converter has been added to the Tool >> page of my website. (Courtesy of Brian Hirasuna of the Cadence PSpice [quoted text clipped - 8 lines] > >mike No, no, Brian (and Charlie) are neat guys... the villain is Cadence, the cretin corporation. ...Jim Thompson | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. >No, no, Brian (and Charlie) are neat guys... the villain is Cadence, >the cretin corporation. Did you see their CEO Bingham(?) on CNBC Squawk Box this morning? Painful. Best regards, Spehro Pefhany  Signature"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com >>No, no, Brian (and Charlie) are neat guys... the villain is Cadence, >>the cretin corporation. [quoted text clipped - 4 lines] >Best regards, >Spehro Pefhany I watch FOX (actually listen, the set is *behind* me) all day long so I missed the CNBC thingy. Please elaborate. ...Jim Thompson | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. >I watch FOX (actually listen, the set is *behind* me) all day long so >I missed the CNBC thingy. Please elaborate. Oh, the interviewer (Mark Haines) had no idea what EDA software was, and the CEO pretty much left a mushy impression that it had a lot to do with manufacturing cell phones and PDAs. I really didn't hear words from the CEO that indicated a crisp focus on anything. Best regards, Spehro Pefhany Signature"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com > >I watch FOX (actually listen, the set is *behind* me) all day long so > >I missed the CNBC thingy. Please elaborate. [quoted text clipped - 6 lines] > Best regards, > Spehro Pefhany i wouldn't expect much from a big company CEO. except rising stock values. how some CEOs manage that without having strong product knowlege can only be explained by underlings who do know what's up. mike > An HSpice to PSpice CMOS Library Converter has been added to the Tool > page of my website. (Courtesy of Brian Hirasuna of the Cadence PSpice > Support Team.) > > ...Jim Thompson I miss my beloved HSpice.. maybe the next time I decide to buy a new car I will instead spend the cash on a single-seat license. ;-) SignatureGreg --The software said it requires Win2000 or better, so I installed Linux. >I miss my beloved HSpice.. maybe the next time I decide to buy a new >car I will instead spend the cash on a single-seat license. ;-) Why spend anything at all? LT Spice is a great simulator and it's free. :-/ -- "I believe history will be kind to me, since I intend to write it." - Winston Churchill >>I miss my beloved HSpice.. maybe the next time I decide to buy a new >>car I will instead spend the cash on a single-seat license. ;-) > > Why spend anything at all? LT Spice is a great simulator and it's > free. > :-/ That being the case, ask Jim why he pays for a seat of Pspice, including the yearly maintenence fees - there IS a reason. SignatureGreg --The software said it requires Win2000 or better, so I installed Linux. >>>I miss my beloved HSpice.. maybe the next time I decide to buy a new >>>car I will instead spend the cash on a single-seat license. ;-) [quoted text clipped - 5 lines] >That being the case, ask Jim why he pays for a seat of Pspice, including >the yearly maintenence fees - there IS a reason. Jim's very set in his ways, having used PS for some 80 years now, plus ISTR he doesn't have much regard for Mike Engleheart for some inexplicable reason. ;-) -- "I believe history will be kind to me, since I intend to write it." - Winston Churchill >>>>I miss my beloved HSpice.. maybe the next time I decide to buy a new >>>>car I will instead spend the cash on a single-seat license. ;-) [quoted text clipped - 9 lines] >ISTR he doesn't have much regard for Mike Engleheart for some >inexplicable reason. ;-) Not so. I've only used PSpice for about 17 years. Sheeeesh! My father is only 85 ;-) I like PSpice (at least with Schematics as a front-end) because it is butt-easy to use, is reliable, and has the industry-standard back-end... Probe. Drop by sometime and I'll show you what a *real* simulator is like. My beef with Mikey is not with LTSpice, but his incessant Kevin-like harping about the bugs in PSpice... like that will improve his seat count ?:-) ...Jim Thompson | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. >Not so. I've only used PSpice for about 17 years. Sheeeesh! My >father is only 85 ;-) My apologies. :-) >I like PSpice (at least with Schematics as a front-end) because it is >butt-easy to use, is reliable, and has the industry-standard >back-end... Probe. Which does what, exactly? You can drop something that looks rather like a probe onto nodes in LT and examine currents and voltages present. Isn't that the same thing? >Drop by sometime and I'll show you what a *real* simulator is like. Well, that's mighty neighbourly of you, Jim. However, as an English chap I expect certain standards as your guest. A properly-made cup of tea, for example (tea-pot, loose-leaf tea, semi-skimmed milk and a digestive biscuit). And that's before I get stuck into your legendary wine cellar... :-) >My beef with Mikey is not with LTSpice, but his incessant Kevin-like >harping about the bugs in PSpice... like that will improve his seat >count ?:-) The comparison with Kev is a little unkind, Jim. I'm sure Mike can at least be reasoned with. ;-> -- "I believe history will be kind to me, since I intend to write it." - Winston Churchill >>Not so. I've only used PSpice for about 17 years. Sheeeesh! My >>father is only 85 ;-) [quoted text clipped - 8 lines] >like a probe onto nodes in LT and examine currents and voltages >present. Isn't that the same thing? Ease of use. >>Drop by sometime and I'll show you what a *real* simulator is like. > [quoted text clipped - 3 lines] >digestive biscuit). And that's before I get stuck into your legendary >wine cellar... :-) What's tea? Oh, yes, that stuff you get in Chinese restaurants ;-) Actually we have several varieties of loose tea in the pantry... the wife drinks it on occasion. I drink coffee (black), wine and an occasional Drambuie, Sambuca or Jack Daniels. >>My beef with Mikey is not with LTSpice, but his incessant Kevin-like >>harping about the bugs in PSpice... like that will improve his seat >>count ?:-) > >The comparison with Kev is a little unkind, Jim. I'm sure Mike can at >least be reasoned with. ;-> Eh? ...Jim Thompson | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. Jim, > My beef with Mikey is not with LTSpice, but his incessant Kevin-like > harping about the bugs in PSpice... Yes, I've noticed you feel threatened whenever I identify a bug in PSpice, but not when someone else does, as if you feel threatened at the possibility that you've bet at the wrong horse. Perhaps you feel you can't join the LTspice crowd without looking stupid because you've bet against it. I've had a weak beef with you(but it always dies away pretty quickly) because I've felt that you are unjustly insultive to me. For example, you've accused me of not knowing how to even run PSpice, but it's you that has had trouble. For example, you sent a bench mark of an Xtal oscillator circuit to various SPICE people. LTspice immediately showed the correct solution that it has a 300MHz spurious oscillation. PSpice showed it faithfully oscillating at the XTal's 14MHz. While it was possible to cause LTspice to do the same simulation(except 3x faster) by setting the integration mode to Gear, it was extremely difficult to get the correct answer out of PSpice. I had to show youhow to run PSpice buy showing you how to watch the solution converge to the correct anser as the maximum allowed timestep was reduced. But, I don't harbor a resent toward you even though you've twice accussed me in this public forum that I don't know how to run PSpice, a patently stupid statement. > ... like that will improve his seat count ?:-) Jim, I'd never accuse you of being a socialist, in fact, you'd probably be an OK guy if you weren't so darn liberal. But where is your entrepreneurial spirit. Why would seat count interest me when it's a free simulator? If I thought selling licenses was the best means to develop the best SPICE program in the most profitable manner, then I'd run the biggest EDA/software company and do that. --Mike >Jim, [snip] >Jim, I'd never accuse you of being a socialist, in fact, you'd >probably be an OK guy if you weren't so darn liberal. But where is [quoted text clipped - 5 lines] > >--Mike Now *that's* a first. I've never been called a liberal before ;-) ...Jim Thompson | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. >>Jim, >> >[snip] >> >>Jim, I'd never accuse you of being a socialist, in fact, you'd >>probably be an OK guy if you weren't so darn liberal. [..] >>--Mike > >Now *that's* a first. I've never been called a liberal before ;-) ROTL! Mike, in the US "liberal" means "communist." Jim, in Europe, "liberal" means "fascist." (Oh, both meanings above as used by opponents of the respective ideologies; people who would describe themselves as "liberal" in the US would be describing themselves as "left-wing" in Europe and be opposed to "liberals" and conversely.) Regards Jens Key ID 0x09723C12, j.tingleff@ieee.org/jens_tingleff@yahoo.com Analogue filtering / HIPERLAN / Mdk Linux / odds and ends http://www.imaginet.fr/~jensting/ +44 1223 211 585 "I don't think you *can* dig your way off a planet.." D Adams >>> Jim, >>> [quoted text clipped - 12 lines] > > Jim, in Europe, "liberal" means "fascist." Cant say I agree with this in the slightest. The "Liberal" party in the UK is neither, and I have never associated that word with anything like the negatives that you suggest here. Cambridge online dictionary. Definition liberal (POLITICS) [Show phonetics] adjective (of a political party or a country) believing in or allowing more personal freedom and a development towards a fairer sharing of wealth and power within society Definition liberal (GENEROUS) [Show phonetics] adjective FORMAL giving or given in a generous way: He was very liberal with the wine. Definition liberal (SOCIETY) [Show phonetics] adjective respecting and allowing many different types of beliefs or behaviour: a liberal society/attitude Kevin Aylward salesEXTRACT@anasoft.co.uk http://www.anasoft.co.uk SuperSpice, a very affordable Mixed-Mode Windows Simulator with Schematic Capture, Waveform Display, FFT's and Filter Design. >>>> Jim, >>>> [quoted text clipped - 16 lines] >UK is neither, and I have never associated that word with anything like >the negatives that you suggest here. Kevin, 1) Quite, so. I was using "Europe" where I should have used "continental Europe". The Uk usage is indeed different from the continental usage. Somewhere in between, I would say ;-) 2) As for the words I used, please insert ";-)" liberally (sorry!) into my original message - if that makes it easier to accept. If not, don't. Regards Jens Key ID 0x09723C12, j.tingleff@ieee.org/jens_tingleff@yahoo.com Analogue filtering / HIPERLAN / Mdk Linux / odds and ends http://www.imaginet.fr/~jensting/ +44 1223 211 585 "I don't think you *can* dig your way off a planet.." D Adams >>Jim, >> [quoted text clipped - 11 lines] > >Now *that's* a first. I've never been called a liberal before I nearly fainted at this point! :-D -- "I believe history will be kind to me, since I intend to write it." - Winston Churchill >>>>>I miss my beloved HSpice.. maybe the next time I decide to buy a new >>>>>car I will instead spend the cash on a single-seat license. ;-) [quoted text clipped - 18 lines] > > Drop by sometime and I'll show you what a *real* simulator is like. A real simulator? I didn't know you own a seat of HSPICE ;-) > My beef with Mikey is not with LTSpice, but his incessant Kevin-like > harping about the bugs in PSpice... like that will improve his seat > count ?:-) I personally haven't used LTSpice for one simple reason - Linear Tech hasn't ported it to Linux. They could at least port their SPICE engine; that shouldn't be difficult at all, unless it is hopelessly intertwined with their GUI (which would be a hopelessly stupid mistake on their part). A command-line driven engine for Linux would be perfectly fine as far as I am concerned. SignatureGreg --The software said it requires Win2000 or better, so I installed Linux. >>>>>> I miss my beloved HSpice.. maybe the next time I decide >>>>>> to buy a new car I will instead spend the cash on a [quoted text clipped - 37 lines] > A command-line driven engine for Linux would be perfectly > fine as far as I am concerned. I've seen some very strange things with the proteus VSM simulator I use. Besides the (all-too-frequent) convergence problems, I've noticed that zener diodes do not like to bias like they should, and diode drop is not correct for the various types of bipolar devices. I'm not sure if it is just an issue with the stock library or a fault of the simulator (it says it is based from the Berkeley 3F5 core, which you'd think should be pretty good...) :) Mark, > ...I've seen some very strange things with the proteus VSM simulator > I use. Besides the (all-too-frequent) convergence problems, I've > noticed that zener diodes do not like to bias like they should... Make sure you specify Ibv. Berkeley SPICE defaults to 1mA but PSpice(and LTspice) defaults to 1e-10A. I see more PSpice-targeted models than Berkeley SPICE and this difference in anticipated default breakdown current effectively moves the zener voltage on unmodifed Berkeley sources. If you specify ibv, the model should breakdown similarly on all SPICE's, though the exact breakdown function used does differ between the PSpice and LTspice breakdown vs the Berkeley SPICE in the interest of handling a discontinuity in the Berkeley version. --Mike > Mark, > [quoted text clipped - 17 lines] > > --Mike Interesting, thanks for the heads-up. :) Greg. > I personally haven't used LTSpice for one simple reason - Linear Tech > hasn't ported it to Linux. They could at least port their SPICE engine; > that shouldn't be difficult at all, unless it is hopelessly intertwined > with their GUI (which would be a hopelessly stupid mistake on their > part). A command-line driven engine for Linux would be perfectly fine > as far as I am concerned. This is the relevant part of the FAQ from the help system regarding Linux/WINE: Q. Do you have a version of LTspice for Linux? A. Not a separate edition, but it does run under WINE. The program has been tested on Linux RedHat 8.0 with WINE version 20030219. Q. OK, I've never used WINE, how do I install that on my Linux box? A. 1. Check with www.winehq.com to find the current version of WINE for your system. At the time of this writing, for RedHat 8.0, this points to http://mecano.gme.usherb.ca/~vberon/wine 2. Copy the appropriate .rpm file to your machine and open it from nautilus. 3. Get the file swcadiii.exe from www.linear.com. In an xterm, execute "wine swcadiii.exe" to install LTspice. 4. There will now be a Linear Technology Logo on your gnome desktop. Double click it to start or type "wine scad3.exe" from an xterm to start the program. That's it! Q. The schematic fonts don't scale as smoothly under WINE as Windows. Why is that? A. WINE is doing the best best it can with the fonts it finds. It will do better if you tell it how to find the files arial.ttf and cour.ttf from your Windows system. Q. The PWL additional point editor doesn't look right under WINE? A. Try using the native Windows .dll from your Windows system. The command line to then invoke LTspice from WINE is: wine -dll commctrl,comctl32=n scad3.exe. Q. It seems LTspice is running slightly differently under WINE/Linux than windows. Why is that? A. LTspice detects whether or not it's running under WINE. If so, it works around a few WINE issues. You can force LTspice to think it's running under WINE with the command line switch -wine. You can force it to think it's not with the command line switch -nowine in case you're interesting in debugging WINE. Q. Under Windows, LTspice extends the virtual address space for waveform viewing to 64 bits. Does that work under WINE? A. Yes. It has been tested on waveform files over 5 Gigabytes in size. Q. Under Linux, does it support unlimited component count and depth of schematic hierarchy? A. Yes. Opps, no. The maximum depth of hierarchy is 64 levels but that limit is just there to allow detection of infinite subcircuit recursion. (Most "unlimited" SPICE's "limit" you to about 21 levels.) LTspice has no limit on node or component count either per page or for the entire circuit. Q. Does cross-probing while simulation work with those slick marching waveforms while running under Linux? A. Yes. Q. So from what version on is LTspice supported under WINE? A. 2.01g. --Mike > Greg. > [quoted text clipped - 7 lines] > This is the relevant part of the FAQ from the > help system regarding Linux/WINE: <snip FAQ> So, instead of having to run the substandard OS, I need only run an interface layer for the substandard OS.. cool... now, is their a FAQ for running it in batch mode? SignatureGreg --The software said it requires Win2000 or better, so I installed Linux. Greg, > > This is the relevant part of the FAQ from the > > help system regarding Linux/WINE: [quoted text clipped - 5 lines] > OS.. cool... now, is their a FAQ for > running it in batch mode? I think batch mode is mentioned in the help. I know it's been documented a few times in the users' group http://groups.yahoo.com/group/LTspice. Basically you just do "scad3.exe -b file.cir" The data will be in file.raw, and warnings, errors, and accounting information will be in file.log. When you run the LTspice executable in this manner, then it never becomes a MS Windows program, i.e., it never creates a window or starts the message pump. But I recommend just running it under WINE. The program is designed to work properly under WINE. There's no speed/performance penalty for simulation. There's a slight graphics speed penalty but, as LTspice uses direct screen writes, most of that penalty comes from the poorer graphics performance of the X Windows System, not WINE. However, the MS Windows help system doesn't work under WINE, you can get a .pdf of the help from http://LTspice.linear-tech.com/software/scad3.pdf. --Mike > Greg, <extra snippage> > But I recommend just running it under WINE. The > program is designed to work properly under WINE. [quoted text clipped - 3 lines] > penalty comes from the poorer graphics performance > of the X Windows System, not WINE. Of course, the performance penalty wouldn't be there if it was using the proper Xv calls and such ;-) SignatureGreg --The software said it requires Win2000 or better, so I installed Linux. > Greg. > [quoted text clipped - 7 lines] > This is the relevant part of the FAQ from the > help system regarding Linux/WINE: But it doesn't give anyone any warm fuzzies on linux knowing they have to use something derived from a total retard swiss cheez OS. > > Greg. > > [quoted text clipped - 11 lines] > knowing they have to use something derived from a total > retard swiss cheez OS. Then write your own software, and keep it strickly for Linux. SignatureMichael A. Terrell Central Florida >>>Greg. >>> [quoted text clipped - 13 lines] > > Then write your own software, and keep it strickly for Linux. That's what i'm doing. It's not so hard to write a spice from scratch. It takes more to figure out the parser and lexical analyser tools/methods. The actual guts of most numerical analysis programs is very easy. A lot of pictorial imagination helps in devising new algorithms. >That's what i'm doing. It's not so hard to write a spice >from scratch. It takes more to figure out the parser and >lexical analyser tools/methods. The actual guts of most >numerical analysis programs is very easy. A lot of pictorial >imagination helps in devising new algorithms. Hmmm. I'm looking forward to seeing what you come up with. My guess is that you don't have very much experience with circuit simulation if you consider the parser more of a problem than solving nonlinear equations, differential-algebraic equations, and sparse matrices... --Steve >>That's what i'm doing. It's not so hard to write a spice > [quoted text clipped - 8 lines] > you consider the parser more of a problem than solving nonlinear > equations, differential-algebraic equations, and sparse matrices... I've made optimizer programs that fit ladder LC filters and pulse shaping filters to fit a goal pulse response, optimizers for frequency and phase equalizers, etc. Also made curve fitting programs to fit gummel-poon and mosfet spice model parameters (DC and capacitance measurements). To do that, i had to implement my own transistor models, confirm that they agreed with pspice, then make the 4th-order runge-kutta analysis program to calculate the DC response in an assumed circuit. Goal convergence was done using mostly steepest descent or conjugate gradient methods. Spice literature is full of cruft on gaussian elimination and sparse matrices. The first is easily eliminated due to properties of the second. Ill conditioning is not in my vocabulary. Numerical mathematics is a walk in the park. However, spice clones are a low priority because with enough experience you only need simulation to verify some small circuit block you can't get grips of, or to verify a mathematically intense design such as a filter. Other areas of cad are more useful to me... In sci.electronics.cad Russell Shaw <rjshaw@iprimus.com.au> wrote: :>>That's what i'm doing. It's not so hard to write a spice :>>from scratch. It takes more to figure out the parser and :>>lexical analyser tools/methods. The actual guts of most :>>numerical analysis programs is very easy. A lot of pictorial :>>imagination helps in devising new algorithms. [ . . . . . . . .] : Numerical mathematics is a walk in the park. : However, spice clones are a low priority because with : enough experience you only need simulation to verify some : small circuit block you can't get grips of, or to verify : a mathematically intense design such as a filter. Other : areas of cad are more useful to me... It sounds like you know something about numerical work, or at least can spout the buzz-words correctly. Therefore my suggestion would be to join one of the existing free-software projects like tclspice, ngspice or Gnucap and help out with bringing those apps to the next level instead of re-inventing the wheel. <soapbox> One problem with the free software world is that there is a propensity amongst developers to start new projects rather than helping with pre-existing ones. This may be due to hubris, lack of knowledge about other projects, or something else. However, it leads to the problem that there are lots of similar packages out there which implement 4/5ths of a task, but are never finished. (Of course, there are plenty of wonderful -- fully featured -- free software projects too, so don't assume that all are like that.) Since a couple of fully-featured apps are better than lots of unfinished ones, why not join a pre-existing project if you want to make a contribution? </soapbox> Stuart > In sci.electronics.cad Russell Shaw <rjshaw@iprimus.com.au> wrote: > :> [quoted text clipped - 31 lines] > > </soapbox> There would be too much throwing out of code if i was to do the schematic editor in geda. It is *far* too modal. A keystroke to set a mode is needed before any little action, and the graphics was hopelessly slow last time i tried it (DRI on my new video card might help). It doesn't work well when a newbie comes along to a communal project and obsoletes half the code that was recently written. The library management in *every* commercial and free schematic editor i've seen is just complete crap. *Decent* hierarchial libraries and schematics are only available in software for many $$$, and even then, there's a ton of beauracratic bull in generating new library components in many cases. Many projects get abandoned half done because they're hobby efforts done by someone until they get interested in something else. The things *i* do are absolutely required for my own use, and could be released if it makes sense. I have saved a certain amount of time by tracing thru some existing drawing programs, but that was only to get a general idea of the techniques involved in drawing programs and how the graphics toolkits were used. The biggest problems with cad software are that they're written primarily by softwarers. And anyway, i've asked tough questions on the lists of some projects and the answers you get are few if any. The only way to get anywhere is to master the relevant toolkits (such as GTK2+, QT, etc) by writing something first, then you can anticipate the workings of other projects and improve them and trace bugs much easier, getting ideas along the way for your own code. Three different programs for the same thing is better than one, because more ideas are put into the separate projects that can be copied between each other and into other programs in completely different fields. That availability of ideas to look and copy is why open source is much better than closed source. No more vendor lock-in of proprietory cad formats. I find most open-source cad projects are still too immature and i wouldn't use any at this point. Russell, > > > I personally haven't used LTSpice for one simple > > > reason - Linear Tech hasn't ported it to Linux. [quoted text clipped - 6 lines] > knowing they have to use something derived from a total > retard swiss cheez OS. You might try it before dwelling on OS flame war issues. As I explained in my other post, there's no simulation speed penalty. The only performance penalty deals with the relatively poorer performance of X graphics verses the simpler MS Windows graphics. BTW, I believe LTspice is the only SPICE on Linux that uses a 64 bit address space for waveform data on 32 bit processors. The virtual memory extension I wrote for Windows was also ported to Linux/WINE. --Mike |
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