On Sat, 25 Aug 2012 19:47:01 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Sat, 25 Aug 2012 18:19:02 -0700, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Sat, 25 Aug 2012 17:57:38 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Sat, 25 Aug 2012 17:44:16 -0700, John Larkin >>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>> >>>>On Sat, 25 Aug 2012 15:09:16 -0700, Jim Thompson >>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>> >>>>>On Sat, 25 Aug 2012 10:31:03 -0700, John Larkin >>>>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>>>> >>>>>>On Sat, 25 Aug 2012 10:14:48 -0700, Jim Thompson >>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>> >>>>>>>On Sat, 25 Aug 2012 10:03:49 -0700, John Larkin >>>>>>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>>>>>> >>>>>>>>On Sat, 25 Aug 2012 09:40:54 -0700, Jim Thompson >>>>>>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>>>>>> >>>>>>>>>On Sat, 25 Aug 2012 09:34:54 -0700, John Larkin >>>>>>>>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>The mounting holes on PC motherboards: are they usually connected to >>>>>>>>>>the PCB ground plane? >>>>>>>>> >>>>>>>>>depends. Are you wearing them like you should ?:-) >>>>>>>>> >>>>>>>>> ...Jim Thompson >>>>>>>> >>>>>>>>You never actually say anything with content any more. You don't even >>>>>>>>discuss circuits in any intelligent way. You've become a useless old >>>>>>>>hen. >>>>>>> >>>>>>>And your WORKING circuits are WHERE ?:-) >>>>>>> >>>>>>> ...Jim Thompson >>>>>> >>>>>>A few are here: >>>>>> >>>>>>http://www.highlandtechnology.com/index.shtml >>>>>> >>>>>> >>>>>>Any your fast current source is where? You can't do it! >>>>>> >>>>>>I rather liked the mosfet-bipolar cascode with Ib correction, but you >>>>>>didn't. What did you find wrong with it? I mean, aside from the fact >>>>>>that I invented it. Are you claiming that this *won't* work? >>>>>> >>>>>>https://dl.dropbox.com/u/53724080/Circuits/Isrc_Ib_2.JPG >>>>>> >>>>>> >>>>>>But I have a couple of better, cuter circuits by now. Show us your >>>>>>approach, and then I'll post a couple more of mine. >>>>>> >>>>>>You never say anything substantive about electronics lately. You can't >>>>>>invent circuits any more. Go back to sci.electronics.basics where >>>>>>amateurs belong. >>>>> >>>>>Show some LTspice .ASC files that can be checked. Then people will >>>>>believe your claims. >>>>> >>>> >>>>That's silly. If you can't look at a circuit and understand it, and >>>>decide how well it will work, and you need a simulator to do your >>>>thinking for you, then you are an amateur. I wouldn't Spice anything >>>>this simple. >>>> >>>>Good grief, you *don't* understand my circuit! >>> >>>You _do_ know how to make people snicker behind your back. >>> >>>Show us your final solution already... >> >>That's it. Anybody half competant should be able to write in the parts >>values, immediately, without even needing a calculator. It's not worth >>simulating because the low frequency behavior is obvious and the GHz >>bits don't sim usefully because the transistor models aren't there. >> >>Why don't you design a fast current source? Because you can't! >> >>You *don't* understand my circuit! > >WHERE did you SHOW a WORKING circuit ?? You didn't.I've posted a bunch of current source circuits. They all work.> >I design sub-nanosecond stuff on-chip all the time, so shove your >snarky crap up your ass. > >You're a shit "designer"... all NO-SHOW. > > ...Jim ThompsonSo show something of your own. You can't. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
pc motherboard grounds
Started by ●August 25, 2012
Reply by ●August 26, 20122012-08-26
Reply by ●August 26, 20122012-08-26
On 2012-08-26, SoothSayer <SaySooth@TheMonastery.org> wrote:> On Sat, 25 Aug 2012 18:50:27 -0700, Jeff Liebermann <jeffl@cruzio.com> > wrote: > >> The idea is to prevent >>ground loops and keep the noise level down. > > That is because the spec allows several different vendor devices to end > up on your backplane, dingledorf. > > They are also hot swap capable. > > Again, it is an entirely different concept than a PC is.USB, PCIe, SAS, and SATA are all hot swappable, also all the external connectors (I've never had trouble hot swapping PS/2 peripherals despite what the rules say) -- ⚂⚃ 100% natural --- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net ---
Reply by ●August 26, 20122012-08-26
miso wrote:> > Sooth Sayer is probably another sock puppet for Always Wrong. You can > change your handle, but the asshole stench always comes through.No 'probably' to it: THE DIMBULB SCORECARD A Monkey <AMonkey@notyourbeastofburdon.org> Abbey Somebody <abnormal@castlefrankenstein.org> All InTheChi <Hostyle@magicregion.org> AM <thisthatandtheother@beherenow.org> AnimalMagic <AnimalMagic@petersbackyard.org> Archimedes' Lever <OneBigLever@InfiniteSeries.Org> AtTheEndofMyRope <AtTheEndofMyRope@AtTheEndofMyRope.org> AwlSome Auger <AwlSomeAuger@BuyOneGetOneFree.org> BaltoTopDog <Balto@gnomealaskaiscold.org> BarnCat <BarnCat@keepingthevermindownatthebarattheendoftheuniverse.org> 10 Bart! <B@rt_The_Sheriff_Is_A_Nig**!.org> BigBalls <BiggestBallsOfAll@thebigbarattheendoftheuniverse.org> BillyPilgrim <BillyPilgrim@thebigbarattheendoftheuniverse.org> BlindBaby <BlindMelonChitlin@wellnevergetthatonethealbumcover.org> Booong... Bum, Bum, Bum, Bum... 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Floyd <Heywood@thebarattheendofthemonolith.org> 30 DreadKnot <DreadKnot@GodandHisWrath.org> Dread Pirate Roberts <DreadPirateRoberts@iamnotlefthanded.org> DrParnassus <DrParnassus@hereforlongtime.org> Duke <DukeNukem@girlsgirlsgirls.org> Duke Nukem FatBytestard <FatBytestard@somewheronyourharddrive.org> FigureItOut <LocusPocus@magicregion.org> FullMettleJacket <GettingCloserToMyHome@somewherenearthewhitelight.org> FunkyPunk FieldEffectTrollsistor <FunkShunPoignter@yermomma.org> FunkyPunk FieldEffectTrollsistor <FunkShunPointer@yermomma.org> 40 George Orr <GergoOrr@thebarattheendoftheuniverse.org> GoldIntermetallicEmbrittlement <GoldIntermetallicEmbrittlement@youdontknowjack.org> GotchaDumbfuck! <BigGrins@inyourdreams.org> Hattori Hanzo <OutintheSnow@billsbackyard.org> HectorZeroni <hectorzeroni@holeyplaces.org> Hellequin <Hellequin@yourpipesaremypipes.org> Herbert John \Jackie\" Gleason" <BufordTJustice@Texarkanacops.gov> HiggsField <higgdfield@whutthableapduyoukno.org> IAmTheSlime <TheSlimeFromYourVideo@oozingacrossyourlivingroomfloor.org> ItchyGato <Itchygato@catswithcritters.org> 50 ItsASecretDummy <secretasianman@thebarattheendoftheuniverse.org> Jupiter Jaq <JupiterJaq@BuyOneGetOneFree.org> Kai <kai@thebarattheendoftheuniverse.org> Klinger <Justtheguywhofillsinthepotholes@justnorthofsouthkorea.org> LargeMarge <LargeMarge@thetentwoposition.org> Lewis Redmond <LewisRedmond@abettermanthanyou.org> life imitates life <pasticcio@thebarattheendoftheuniverse.org> Lil Red Riding In The Hood <lilredridinginthehood@grandmashouseattheendoftheuniverse.org> lurch <lurch@yourangcousinitslibrary.org> MadManMoon <TheWholePlanetIsMine@hereandnow.org> 60 MakeNoAttemptToAdjustYourSet <DoNotAttemptToAdjustYourSet@anytime.org> MarkDatter@disdatanddeudder.org MassiveProng@thebarattheendoftheuniverse.org <MassiveProng@thebarattheendoftheuniverse.org> MeowSayTongue <MeowSayTongue@thebarattheendoftheuniverse.org> MettleBeerStolid <MettleBeerStolid@somewherenearthewaterpipe.org> Mortimer Brewster Mr.Eko <ekointhedirt@lostisland.org> Mr. Haney <mrhaney@thebarattheendofthefarmroad.org> MrTallyman <MrTallyman@BananaCountersRUs.org> My Name Is Tsu How Do You Do <Tsu@hereforlongtime.org> 70 Mycelium <myceliumgrows@underyourshrooms.org> Mycelium <mycelium@thematrixattheendofthemushroomstem.org> Naomi Price <NaomiPrice@guesswhatisforsale.org> Neanderthal <dance@gottafindawomanrighton.org> Notably Stationed <NotableStation@inlife.org> Numer0 Un0 <Numer0Un0@abettermanthanyou.org> Nunya <jack_shephard@cox.net> OutsideObserver <Stand And Deliver@thebarattheendoftheuniverse.org> Pasticcio Perenis <Perenis@hereforlongtime.org> 80 Pieyed Piper <pieyedPiper@thebongshopattheendoftheuniverse.org> Phat Bytestard <PhatBytestard@getinmahharddrive.org> PowderedToastMan <PowderedToastMan@YouEeediot.org> Pueblo Dancer <Kachina@AllHopiIsLost.org> RoyLFuchs <RoyLFuchs@urfargingicehole.org> scorpius <scorpius@thewormholethatemptiesontheothersideoftheuniverse.org> SkyPilot <somewhere@theedgeofspace.org> SomeKindOfWonderful <SomeKindOfWonderful@allthegirlsintheworldbeware.org> Son of a Sea Cook <NotaBrewster@thebarattheendoftheuniverse.org> SoothSayer <SaySooth@TheMonastery.org> 90 Spurious Response <SpuriousResponse@cleansignal.org> StickThatInYourPipeAndSmokeIt <Zarathustra@thusspoke.org> Sum Ting Wong <SumTingWong@thebarattheendoftheVenusianLightnigBolt.org> Sum Ting Wong <SumTingWong@thebarattheendoftheVenusianLightnigBoltmonolith.org> SuspendedInGaffa <suspendedingaffa@kateshouse.org> The Great Attractor <SuperM@ssiveBlackHoleAtTheCenterOfTheMilkyWayGalaxy.org> TheJoker <LeonardooftheLarcenousLaugh@thebarattheendoftheuniverse.org> The Keeper of the Key to The Locks <TheLoner@thebarattheendoftheuniverse.org> The Last Mimsy <mimsy@TheOtherSideoftheLookingGlass.org> The Loner <TheLoner@thebarattheendoftheuniverse.org> 100 The_Giant_Rat_of_Sumatra <GeorgeTirebiter@drmemory.org> George Leroy Tirebiter TheGlimmerMan <justaglimmer@thebarattheendoftheuniverse.org> TheKraken <ReachUpandSuckYouDowntotheDepths@yup.org> TheQuickBrownFox <thequickbrownfox@overthelazydog.org> TralfamadoranJetPilot <BillyPilgrim@thebigbarattheendoftheuniverse.org> TunnelRat <TunnelRat@yourpipesaremypipes.org> TutAmongUs@thebarattheendoftheuniverse.org <TutAmongUs@thebarattheendoftheuniverse.org> Tutankhamun UltimatePatriot <UltimatePatriot@thebestcountry.org> 110 UnKempt <UnKempt@HoardersRUs.org> UpGrade <UpGrade@thebarattheendoftheuniverse.org> UpYerNose <UpYerNose@witarubbahose.org> ValleyGirl <LuvYerNailz@LikeIWouldGiveIt.Comeon> VelCrowPhly <VelCrowPhly@thetiethatbindsUall.org> VioletaPachydermata <PurpleElephant@thebarattheendoftheuniverse.org> WallyWallWhackr <wallywallwhackr@thematrixattheendofthemushroomstem.org> WarmUnderbelly <WarmUnderbellyOfAmerica@thebarattheendoftheuniverse.org> WoolyBully <WoolyBully@arcticicemasses.org> Zarathustra 120 100WattDarkSucker <100WattDarkSucker@thebigbarattheendoftheuniverse.org>
Reply by ●August 26, 20122012-08-26
On 26 Aug 2012 04:57:37 GMT, Jasen Betts <jasen@xnet.co.nz> wrote:>The machine screws and standoffs come with the case.They also come with motherboards, jackass.
Reply by ●August 26, 20122012-08-26
On 26 Aug 2012 05:15:08 GMT, Jasen Betts <jasen@xnet.co.nz> wrote:>On 2012-08-26, SoothSayer <SaySooth@TheMonastery.org> wrote: >> On Sat, 25 Aug 2012 18:50:27 -0700, Jeff Liebermann <jeffl@cruzio.com> >> wrote: >> >>> The idea is to prevent >>>ground loops and keep the noise level down. >> >> That is because the spec allows several different vendor devices to end >> up on your backplane, dingledorf. >> >> They are also hot swap capable. >> >> Again, it is an entirely different concept than a PC is. > >USB, PCIe, SAS, and SATA are all hot swappable,No shit. Peripheral connection is yet one more reason why there will ALWAYS be a connection between the MOBO ground and the case and the shells of all of those peripheral interconnects you speak of. So, nothing has changed idiot. Hooking up a USB cable to a "ground-make-first" connection is entirely different than hooking up a PC/104 device into a back plane. There are only about 100 more connections being made. And no, idiot, SATA was NOT hot swappable SAS is OOTB, and eSATA is, but SATA is NOT. To use SATA as a hot swap, there has to be a device (drive controller/hot swap bay, etc.) in between the device and the computer's SATA port.>also all the external connectors (I've never had trouble hot swapping >PS/2 peripherals despite what the rules say)
Reply by ●August 26, 20122012-08-26
On Sun, 26 Aug 2012 02:46:46 -0400, "Michael A. Terrell" <mike.terrell@earthlink.net> wrote:> No 'probably' to it:Christ, what a fucking retarded pussy you are. Never a contributory post, just stupid horseshit. That is all you can muster, loser. More proof that all your claimed "knowledge" about PCs is essentially nothing more than user class one level stupidity. The only thing you are "good at" is showing this group how much of a retarded little punk you are.
Reply by ●August 26, 20122012-08-26
On Sun, 26 Aug 2012 01:06:09 -0700, SoothSayer <SaySooth@TheMonastery.org> wrote:>On Sun, 26 Aug 2012 02:46:46 -0400, "Michael A. Terrell" ><mike.terrell@earthlink.net> wrote: > >> No 'probably' to it: > > Christ, what a fucking retarded pussy you are.He answered a question, factually, Nymbecile.> Never a contributory post, just stupid horseshit.Any conversation where you are involved is, by its nature, stupid horseshit.> That is all you can muster, loser.You're here. He wanted a loser like you to understand, DimBulb.> More proof that all your claimed "knowledge" about PCs is essentially >nothing more than user class one level stupidity.Where is that "spec" that says that PC mounting holes have to be grounded, again, AlwaysWrong?> The only thing you are "good at" is showing this group how much of a >retarded little punk you are.Can't stand the competition, Dimmie?
Reply by ●August 26, 20122012-08-26
On Sat, 25 Aug 2012 21:58:02 -0700, John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:>On Sat, 25 Aug 2012 19:47:01 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Sat, 25 Aug 2012 18:19:02 -0700, John Larkin >><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>[snip]>> >>WHERE did you SHOW a WORKING circuit ?? You didn't. > >I've posted a bunch of current source circuits. They all work.In previous posts you said that the ones you attempted for your 1V/ns ramp oscillated??> >> >>I design sub-nanosecond stuff on-chip all the time, so shove your >>snarky crap up your ass. >> >>You're a shit "designer"... all NO-SHOW. >> >> ...Jim Thompson > >So show something of your own. > >You can't.Show us the ramp device that _doesn't_ oscillate. And learn how to appropriately snip. Or is your whole object to see your name constantly in print ?:-) ...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 | I love to cook with wine. Sometimes I even put it in the food.
Reply by ●August 26, 20122012-08-26
John Larkin wrote:> > > The mounting holes on PC motherboards: are they usually connected to > the PCB ground plane? > > >Me thinks so.
Reply by ●August 26, 20122012-08-26
On Sun, 26 Aug 2012 08:01:35 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Sat, 25 Aug 2012 21:58:02 -0700, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Sat, 25 Aug 2012 19:47:01 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Sat, 25 Aug 2012 18:19:02 -0700, John Larkin >>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>> >[snip] >>> >>>WHERE did you SHOW a WORKING circuit ?? You didn't. >> >>I've posted a bunch of current source circuits. They all work. > >In previous posts you said that the ones you attempted for your 1V/ns >ramp oscillated??It depends on the PNP transistor and the value of the base resistor. A BCX71 oscillates at around 80 MHz, and the hotter RF parts much higher. It has nothing to do with the opamp gain/phase as you suggested; the oscillation is local to the transistor. 100 ohms in the base fixes it for pretty much all cases.> >> >>> >>>I design sub-nanosecond stuff on-chip all the time, so shove your >>>snarky crap up your ass. >>> >>>You're a shit "designer"... all NO-SHOW. >>> >>> ...Jim Thompson >> >>So show something of your own. >> >>You can't. > >Show us the ramp device that _doesn't_ oscillate.As noted, the proper base/gate resistor fixes it, as it does for most emitter-follower type circuits. Not many people appreciate how much emitter follower configs (low-z in the base, hi-z in the emitter) like to oscillate. I always include a base resistor in things like this, and sometimes tune it on the PC board as needed. If there's no Miller issue (as might matter for a fast linear ramp) I just make it big, 330 ohms or whatever, from the start and don't worry about it. I have dozens of products with nanosecond-scale ramp circuits in them. They all work. I just thought I'd discuss a couple of new ideas. New ideas seem to offend you. You'd poison a brainstorming session.> >And learn how to appropriately snip. Or is your whole object to see >your name constantly in print ?:-) > > ...Jim ThompsonDesign and post a fast-ramp current source that's better than any of mine. Or even functional. But you can't. You don't post circuits any more. Just fuzzy-stuff personality whining. Sad. I have a couple of new ones, and I'll post one soon, which it's guaranteed you'll whine about with zero content. After lunch in the Mission maybe. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators