How do you design these days?
in [Design]
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From: Joerg on 1 Jan 2010 18:57 Fred Bartoli wrote: > Joerg a �crit : >> Jim Thompson wrote: >>> On Fri, 01 Jan 2010 13:27:12 -0800, Joerg <invalid(a)invalid.invalid> >>> wrote: >>> >>>> Jim Thompson wrote: >>>>> On Fri, 01 Jan 2010 16:17:30 -0500, Phil Hobbs >>>>> <pcdhSpamMeSenseless(a)electrooptical.net> wrote: >>>>> >>>>>> On 1/1/2010 3:56 PM, Joerg wrote: >>>>>>> krw wrote: >>>>>>>> Why are pin numbers an issue? You never probe from the backside >>>>>>>> of a >>>>>>>> board? The spatial transform is pretty ingrained in me and I >>>>>>>> spent a >>>>>>>> decade doing processor design (no PCB stuff). >>>>>>> Until one fine day you have one of those Supertex high voltage >>>>>>> chips. >>>>>>> Some weirdness happens on the prototype boards, must be a software >>>>>>> issue. It's always software. Has to be. Hmm, let's see how that >>>>>>> looks on >>>>>>> the old breadboard. Grab probe, lemmee see, serial data out was, >>>>>>> uhm, >>>>>>> umpteenth pin from upper left ... POP ... *PHOOMP* >>>>>>> >>>>>> How dull your life would be without fireworks, though. ;) >>>>>> >>>>>> Cheers >>>>>> >>>>>> Phil Hobbs >>>>> Indeed! I haven't had a "fireworks" event since ~1980. >>>>> >>>> That's because you are designing chips with your computation >>>> machine. Having your hands inside a unit with a monstrous >>>> transformer that let's off an evil TUNGGGG when turned on is a >>>> different ballgame :-) >>> >>> (1) I don't go sticking my fingers where I can't see ;-) >>> >> >> Sometimes, man's got to do what man's got to do ... >> >> >>> (2) I designed discretes until around 1995, no flames. >>> >> >> Yeah, but probably no high voltage or power stuff. >> >> >>> (3) And no reports of flaming failures of systems with my chips, since >>> 1980... and the 1980 event wasn't even a final chip, it was a >>> breadboard... but it WAS a doozy ;-) >>> >> >> Nothing like a nice big spark once in a while :-) >> > > I just finished working on a 10MW IGBT bridge 12x 3.3kV/1500A IGBT modules. > We expected to have one set destroyed so that the customer stopped > touting his idiotic non solution, but those damned IGBT are, ahem, rugged. > Fortunately we finally saw the light (:-) and all is working as expected > without even the slightest firework. > > It's fun to see 1" dia cables jump due to 15kA pulses though, but the > first time your psychological security distance is, well, somewhat > laaaarge :-) > Shazam! I've never worked on anything this big. Did you equip one of the French nuclear power stations with switch gear? Or maybe the drive train of a TGV? -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Joerg on 1 Jan 2010 18:58 Michael A. Terrell wrote: > Joerg wrote: >> Wish we had such flea markets up here near Sacramento. But it's mostly a >> city of bureaucrats :-( > > > Where they buy & sell old politicians? ;-) > No, where they move them from a plush chair into a plum job :-) -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Jim Thompson on 1 Jan 2010 19:14 On Fri, 01 Jan 2010 15:56:13 -0800, Joerg <invalid(a)invalid.invalid> wrote: >Jim Thompson wrote: [snip] >> >> GenRad sales department, to this day, claim I rigged the Kaboom (and >> traveling flame front :-) to keep them from hanging around my lab. >> > >How did you do the flame front? Oh wait, in this day and age maybe one >should not divulge ... Imagine a western movie... and the dynamite fuse... the "fuse", in my case, was a line cord ;-) ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | "You cannot help the poor by destroying the rich. You cannot strengthen the weak by weakening the strong. You cannot bring about prosperity by discouraging thrift. You cannot lift the wage earner up by pulling the wage payer down. You cannot further the brotherhood of man by inciting class hatred. You cannot build character and courage by taking away people's initiative and independence. You cannot help people permanently by doing for them, what they could and should do for themselves." -Abraham Lincoln
From: Michael A. Terrell on 1 Jan 2010 19:33 Joerg wrote: > > Michael A. Terrell wrote: > > Joerg wrote: > >> Wish we had such flea markets up here near Sacramento. But it's mostly a > >> city of bureaucrats :-( > > > > > > Where they buy & sell old politicians? ;-) > > > > No, where they move them from a plush chair into a plum job :-) They were supposed to go to the cat food plant. -- Greed is the root of all eBay.
From: Joerg on 1 Jan 2010 19:36
Michael A. Terrell wrote: > Joerg wrote: >> Michael A. Terrell wrote: >>> Joerg wrote: >>>> Wish we had such flea markets up here near Sacramento. But it's mostly a >>>> city of bureaucrats :-( >>> >>> Where they buy & sell old politicians? ;-) >>> >> No, where they move them from a plush chair into a plum job :-) > > > They were supposed to go to the cat food plant. > No, no! Or do you want all the cats in the US to get sick? -- SCNR, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM. |