LTSpice Automation
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From: JosephKK on 17 Feb 2010 22:59 On Wed, 17 Feb 2010 17:31:31 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: >On Wed, 17 Feb 2010 16:10:13 -0800, Joerg <invalid(a)invalid.invalid> >wrote: > >>Jim Thompson wrote: >>> On Wed, 17 Feb 2010 14:25:26 -0800, Joerg <invalid(a)invalid.invalid> >>> wrote: >>> >>>> Fred Bartoli wrote: >>>>> Fred Abse a écrit : >>>>>> On Wed, 17 Feb 2010 07:26:20 -0800, JosephKK wrote: >>>>>> >>>>>>> Geez, did everybody forget the three phase rectifier efficiency that >>>>>>> Fred Bartoli did for me? Note the stepped load on the right. >>>>>> T'warn't Fred Bartoli,t'was I :-) >>>>>> >>>>> Oh, I thought even I forgot about it :-) >>>>> >>>>> Well, I don't use much LTspice thanks to its poor GUI, so I couldn't >>>>> have done it... >>>>> >>>> You guys are spoiled, or too young. Back when I started the "GUI" of >>>> PSpice consisted of a rather small green CRT hanging off some CGA card. >>>> I had the deluxe edition, a CRT in nicotine-yellow :-) >>> >>> Sheeeesh! When I started using Spice I drew schematics on paper pads, >>> numbered the nodes, typed in the netlist and ran it under DOS. >>> >>> Aaron eased my pain by writing a pre/post version controller which >>> numbered all the .CIR and .DAT files so I could keep track of all the >>> changes. >>> >>> Data spewed forth from a tractor feed printer: >>> >>> .001 * >>> .002 * >>> .003 * >>> .004 * >>> >>> etc. Anyone else remember those days? >>> >> >>A friend of mine tried this with a Commodore daisy wheel printer, same >>that I used to have. It could do microstepping and he just used the dot. >>Which consequently wore out real fast ... >> >>My first forays in to computing was writing Fortran. Using a Juki punch >>card machine. > >Summer of 1961 I took a sequence of courses on the Institute's first >transistorized mainframe (IIRC IBM 709 ?), FAP (machine language) and >FORTRAN... lots of punched cards... don't drop your stack ;-) > > ...Jim Thompson I quickly got the habit of carrying them with three fresh rubber bands holding them together, in order. Plus small stacks in envelopes, and large stacks in boxes.
From: Joel Koltner on 18 Feb 2010 12:11 "Tim Williams" <tmoranwms(a)charter.net> wrote in message news:hlhqvs$cte$1(a)news.eternal-september.org... > I'm astonished that the book is only 1989, and not older! Those text-mode graphs persisted until the mid-'90s and perhaps even late-'90s at times -- particularly at schools where there's sometimes not the budget or personnel to upgrade the software. In the early '90s while I was an undergraduate, some of the grad students were still actively writing new software for PDP-11s...
From: Joerg on 18 Feb 2010 12:58 Jim Thompson wrote: > On Wed, 17 Feb 2010 17:37:57 -0800, Joerg <invalid(a)invalid.invalid> > wrote: > >> Jim Thompson wrote: >>> On Wed, 17 Feb 2010 16:51:58 -0800, Joerg <invalid(a)invalid.invalid> >>> wrote: >>> >>>> Fred Bartoli wrote: >>>>> Joerg a �crit : >>>>>> Fred Bartoli wrote: >>>>>>> Joerg a �crit : >>>>>>>> Fred Bartoli wrote: >>>>>>>>> Fred Abse a �crit : >>>>>>>>>> On Wed, 17 Feb 2010 07:26:20 -0800, JosephKK wrote: >>>>>>>>>> >>>>>>>>>>> Geez, did everybody forget the three phase rectifier efficiency >>>>>>>>>>> that Fred Bartoli did for me? Note the stepped load on the right. >>>>>>>>>> T'warn't Fred Bartoli,t'was I :-) >>>>>>>>>> >>>>>>>>> Oh, I thought even I forgot about it :-) >>>>>>>>> >>>>>>>>> Well, I don't use much LTspice thanks to its poor GUI, so I >>>>>>>>> couldn't have done it... >>>>>>>>> >>>>>>>> You guys are spoiled, or too young. Back when I started the "GUI" of >>>>>>>> PSpice consisted of a rather small green CRT hanging off some CGA >>>>>>>> card. I had the deluxe edition, a CRT in nicotine-yellow :-) >>>>>>>> >>>>>>> Well, I did lots of *real design* before committing spice, which >>>>>>> happened on the late, maybe 10 years ago... >>>>>>> >>>>>>> I often do complicated projects where many design options have to be >>>>>>> studied, and when the GUI stands in the way, it's a no-no. >>>>>>> >>>>>>> The small sensor I'm finishing right now is a good example. >>>>>>> As was also the PSU that powers the DUTs on testers used to wafer >>>>>>> test the INTEL and AMD CPUs. (Yep, all your nice CPUs are tested by >>>>>>> my design :-) >>>>>> I always knew that the Romans never completely subdued you guys and >>>>>> you'd come back :-) >>>>>> >>>>>> >>>>>>> When I did that (circa 2000) I estimated it would have taken 3 to 4 >>>>>>> more time on the design pass with another spice, not even speaking of >>>>>>> LTspice. >>>>>>> >>>>>> Much of my stuff can't even possibly be simulated. Like a lot of >>>>>> transducers. >>>>>> >>>>> Sure it can. Well, most of it. That's just a matter of model development >>>>> and will it pay back to do so or not. And when it's done, it's done :-) >>>>> >>>> We are doing that as I write this, or rather, a client does. But it has >>>> its limits. If you want to perfect it you may slip the time-to-market >>>> schedule too much. In the old days it was even worse, once we blew up a >>>> Pentium-I during a sim (back when those were just out and really >>>> expensive). The client wasn't exactly happy when that happened. >>>> >>>> >>>>> I usually have big time developing adequate models (well, less and less >>>>> since I now have plenty). Then, with realistic models you gain a lot of >>>>> insight and have much better designs with less bench work. >>>>> For ex. it's easier to measure components at high temp, use spice and >>>>> have it right first time, than discovering pbs when baking the proto, >>>>> even without saying that investigating at high temp is slow and painful. >>>>> >>>> If you design super small stuff with lots of electronics, yes. Poring >>>> over one of those right now, custom chips with a few hundred channels >>>> that must fit into a little less than 2.5mm diameter tube. Flip-chip >>>> bonding these will be fun. >>> I didn't do ANY simulation until around 1977-78. Prior to that was >>> all hand drawings and math solving; and bread-boarding... so that >>> covers all of my Motorola standard I/C products without a single >>> simulation. >>> >>> I still "think by hand", but I don't know how you can get by without a >>> simulator when you're talking literally thousands of transistors. >>> >> This one will have tens of thousands ... >> >> <bead of sweat dropping off forehead> > > Characterize, then convert the digital to behavioral models, then > it'll be easy ;-) > It's not digital, the digital parts are a piece of cake :-( -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: krw on 18 Feb 2010 18:55 On Wed, 17 Feb 2010 16:10:13 -0800, Joerg <invalid(a)invalid.invalid> wrote: >Jim Thompson wrote: >> On Wed, 17 Feb 2010 14:25:26 -0800, Joerg <invalid(a)invalid.invalid> >> wrote: >> >>> Fred Bartoli wrote: >>>> Fred Abse a �crit : >>>>> On Wed, 17 Feb 2010 07:26:20 -0800, JosephKK wrote: >>>>> >>>>>> Geez, did everybody forget the three phase rectifier efficiency that >>>>>> Fred Bartoli did for me? Note the stepped load on the right. >>>>> T'warn't Fred Bartoli,t'was I :-) >>>>> >>>> Oh, I thought even I forgot about it :-) >>>> >>>> Well, I don't use much LTspice thanks to its poor GUI, so I couldn't >>>> have done it... >>>> >>> You guys are spoiled, or too young. Back when I started the "GUI" of >>> PSpice consisted of a rather small green CRT hanging off some CGA card. >>> I had the deluxe edition, a CRT in nicotine-yellow :-) >> >> Sheeeesh! When I started using Spice I drew schematics on paper pads, >> numbered the nodes, typed in the netlist and ran it under DOS. >> >> Aaron eased my pain by writing a pre/post version controller which >> numbered all the .CIR and .DAT files so I could keep track of all the >> changes. >> >> Data spewed forth from a tractor feed printer: >> >> .001 * >> .002 * >> .003 * >> .004 * >> >> etc. Anyone else remember those days? >> > >A friend of mine tried this with a Commodore daisy wheel printer, same >that I used to have. It could do microstepping and he just used the dot. >Which consequently wore out real fast ... When I first started with IBM, we used communicating Selectrics and 2741s (a bullet-proofed Selectric sort of thing) for this. Overnight runs used a different simulator and chain printers. The printing was the same as above, though, and printouts were often a foot thick. >My first forays in to computing was writing Fortran. Using a Juki punch >card machine. We used IBM 029s in high school and college with a 360/75 (amazing beast) at the business end.
From: krw on 18 Feb 2010 18:57
On Wed, 17 Feb 2010 20:15:04 -0500, legg <legg(a)nospam.magma.ca> wrote: >On Wed, 17 Feb 2010 15:33:11 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: > >>On Wed, 17 Feb 2010 14:25:26 -0800, Joerg <invalid(a)invalid.invalid> >>wrote: >> >>>Fred Bartoli wrote: >>>> Fred Abse a �crit : >>>>> On Wed, 17 Feb 2010 07:26:20 -0800, JosephKK wrote: >>>>> >>>>>> Geez, did everybody forget the three phase rectifier efficiency that >>>>>> Fred Bartoli did for me? Note the stepped load on the right. >>>>> >>>>> T'warn't Fred Bartoli,t'was I :-) >>>>> >>>> >>>> Oh, I thought even I forgot about it :-) >>>> >>>> Well, I don't use much LTspice thanks to its poor GUI, so I couldn't >>>> have done it... >>>> >>> >>>You guys are spoiled, or too young. Back when I started the "GUI" of >>>PSpice consisted of a rather small green CRT hanging off some CGA card. >>>I had the deluxe edition, a CRT in nicotine-yellow :-) >> >>Sheeeesh! When I started using Spice I drew schematics on paper pads, >>numbered the nodes, typed in the netlist and ran it under DOS. >> >>Aaron eased my pain by writing a pre/post version controller which >>numbered all the .CIR and .DAT files so I could keep track of all the >>changes. >> >>Data spewed forth from a tractor feed printer: >> >>.001 * >>.002 * >>.003 * >>.004 * >> >>etc. Anyone else remember those days? >> >They were still torturing tech students that way in the 80s. Didn't everyone have PCs by then? |