Interesting TIA design
in [Design]
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From: Fred Bartoli on 29 Oct 2009 05:53 John Larkin a �crit : > On Wed, 28 Oct 2009 14:53:37 -0700, Joerg <invalid(a)invalid.invalid> > wrote: > >> John Larkin wrote: >>> On Wed, 28 Oct 2009 13:04:58 -0700, Joerg <invalid(a)invalid.invalid> >>> wrote: >>> >>>> John Larkin wrote: >>>>> On Wed, 28 Oct 2009 12:52:24 -0400, Phil Hobbs >>>>> <pcdhSpamMeSenseless(a)electrooptical.net> wrote: >>>>> >>>>>> John Devereux wrote: >>>>>>> Phil Hobbs <pcdhSpamMeSenseless(a)electrooptical.net> writes: >>>>>>> >>>>>>>> Jan Panteltje wrote: >>>>>>>>> On a sunny day (Tue, 27 Oct 2009 17:45:49 -0700 (PDT)) it happened Tim >>>>>>>>> Williams <tmoranwms(a)gmail.com> wrote in >>>>>>>>> <3e89ba34-8f94-452a-bc7c-5eb86e00f912(a)k26g2000vbp.googlegroups.com>: >>>>>>> [...] >>>>>>> >>>>>>>>>> When I wanted to do a complete layout of this circuit, I did it on a >>>>>>>>>> full sheet of newsprint. Old crummy stuff, it ain't vellum, but it >>>>>>>>>> was on hand. Then I put it on the computer (in A4 size sections). >>>>>>>>>> >>>>>>>>>> http://myweb.msoe.edu/williamstm/Images/EV_Paper_Draft.jpg >>>>>>>>>> >>>>>>>>>> Tim >>>>>>>>> Yep, >>>>>>>>> ftp://panteltje.com/pub/fdc-1.jpg >>>>>>>>> ftp://panteltje.com/pub/fdc-2.jpg >>>>>>>>> Note the date (top right). >>>>>>>>> >>>>>>>> Wow, an ancient manuscript. Didn't they have ruled vellum in those >>>>>>>> days? Of course then you wouldn't be able to trace the prehistory of >>>>>>>> the MS by looking at the incomplete erasing. ;) >>>>>>>> Cheers >>>>>>>> >>>>>>>> Phil Hobbs >>>>>>>> (Proud owner of a lifetime supply of Clearprint) >>>>>>> So where in this benighted continent - i.e. Europe - can I obtain this >>>>>>> miraculous parchment? Anyone know? A3 or A4 would be nice! >>>>>>> >>>>>>> John Larkin guarantees it will increase my IQ by 10 points and allow me >>>>>>> to become a Real Engineer at last. >>>>>>> >>>>>>> (I tried printing out a faint squared pattern on my laserjet and it's not >>>>>>> bad. But I feel I am missing out on the true experience). >>>>>>> >>>>>> Dunno. But first class vellum is beautiful--you can erase something 10 >>>>>> times and it looks like you got it right the first time. (Which might >>>>>> have something to do with the apparent IQ increase.) ;) If you aren't >>>>>> allergic to inches, the good stuff is 1000H 1010 with the blue fadeout grid. >>>>>> >>>>>> Their international dealer list is at >>>>>> http://www.clearprintpapercompany.com/media/dealers/international_dealers.html >>>>>> There's one in Germany and one in Italy. >>>>>> >>>>>> Cheers >>>>>> >>>>>> Phil Hobbs >>>>> This >>>>> >>>>> ftp://jjlarkin.lmi.net/FilterBoard.jpg >>>>> >>>>> becomes this: >>>>> >>>>> ftp://jjlarkin.lmi.net/Filter1.jpg >>>>> >>>> Easy on the solder paste there, guys ... :-) >>>> >>>> [...] >>> Engineering unit, hand soldered. >>> >> Ok, yeah, mine also end up with those large blobs of solder when done by >> Weller. The Kester No-Clean 15mils is the smallest diameter solder with >> decent behavior that I could find. Does anyone know smaller stuff? > > The problem with no-clean solder is that it's so hard to clean. > That's why it's named that way. You can't clean it... -- Thanks, Fred.
From: Glen Walpert on 29 Oct 2009 09:18 On Thu, 29 Oct 2009 10:53:26 +0100, Fred Bartoli <" "> wrote: >John Larkin a �crit : >> On Wed, 28 Oct 2009 14:53:37 -0700, Joerg <invalid(a)invalid.invalid> >> wrote: >> >>> John Larkin wrote: >>>> On Wed, 28 Oct 2009 13:04:58 -0700, Joerg <invalid(a)invalid.invalid> >>>> wrote: >>>> >>>>> John Larkin wrote: >>>>>> On Wed, 28 Oct 2009 12:52:24 -0400, Phil Hobbs >>>>>> <pcdhSpamMeSenseless(a)electrooptical.net> wrote: >>>>>> >>>>>>> John Devereux wrote: >>>>>>>> Phil Hobbs <pcdhSpamMeSenseless(a)electrooptical.net> writes: >>>>>>>> >>>>>>>>> Jan Panteltje wrote: >>>>>>>>>> On a sunny day (Tue, 27 Oct 2009 17:45:49 -0700 (PDT)) it happened Tim >>>>>>>>>> Williams <tmoranwms(a)gmail.com> wrote in >>>>>>>>>> <3e89ba34-8f94-452a-bc7c-5eb86e00f912(a)k26g2000vbp.googlegroups.com>: >>>>>>>> [...] >>>>>>>> >>>>>>>>>>> When I wanted to do a complete layout of this circuit, I did it on a >>>>>>>>>>> full sheet of newsprint. Old crummy stuff, it ain't vellum, but it >>>>>>>>>>> was on hand. Then I put it on the computer (in A4 size sections). >>>>>>>>>>> >>>>>>>>>>> http://myweb.msoe.edu/williamstm/Images/EV_Paper_Draft.jpg >>>>>>>>>>> >>>>>>>>>>> Tim >>>>>>>>>> Yep, >>>>>>>>>> ftp://panteltje.com/pub/fdc-1.jpg >>>>>>>>>> ftp://panteltje.com/pub/fdc-2.jpg >>>>>>>>>> Note the date (top right). >>>>>>>>>> >>>>>>>>> Wow, an ancient manuscript. Didn't they have ruled vellum in those >>>>>>>>> days? Of course then you wouldn't be able to trace the prehistory of >>>>>>>>> the MS by looking at the incomplete erasing. ;) >>>>>>>>> Cheers >>>>>>>>> >>>>>>>>> Phil Hobbs >>>>>>>>> (Proud owner of a lifetime supply of Clearprint) >>>>>>>> So where in this benighted continent - i.e. Europe - can I obtain this >>>>>>>> miraculous parchment? Anyone know? A3 or A4 would be nice! >>>>>>>> >>>>>>>> John Larkin guarantees it will increase my IQ by 10 points and allow me >>>>>>>> to become a Real Engineer at last. >>>>>>>> >>>>>>>> (I tried printing out a faint squared pattern on my laserjet and it's not >>>>>>>> bad. But I feel I am missing out on the true experience). >>>>>>>> >>>>>>> Dunno. But first class vellum is beautiful--you can erase something 10 >>>>>>> times and it looks like you got it right the first time. (Which might >>>>>>> have something to do with the apparent IQ increase.) ;) If you aren't >>>>>>> allergic to inches, the good stuff is 1000H 1010 with the blue fadeout grid. >>>>>>> >>>>>>> Their international dealer list is at >>>>>>> http://www.clearprintpapercompany.com/media/dealers/international_dealers.html >>>>>>> There's one in Germany and one in Italy. >>>>>>> >>>>>>> Cheers >>>>>>> >>>>>>> Phil Hobbs >>>>>> This >>>>>> >>>>>> ftp://jjlarkin.lmi.net/FilterBoard.jpg >>>>>> >>>>>> becomes this: >>>>>> >>>>>> ftp://jjlarkin.lmi.net/Filter1.jpg >>>>>> >>>>> Easy on the solder paste there, guys ... :-) >>>>> >>>>> [...] >>>> Engineering unit, hand soldered. >>>> >>> Ok, yeah, mine also end up with those large blobs of solder when done by >>> Weller. The Kester No-Clean 15mils is the smallest diameter solder with >>> decent behavior that I could find. Does anyone know smaller stuff? >> >> The problem with no-clean solder is that it's so hard to clean. >> > >That's why it's named that way. You can't clean it... Not really true, there have been numerous articles published on cleaning no-clean with aqueous cleaners, it is done routinely. No-clean flux is so named because when it is processed exactly right (automation required) there are no highly reactive components left in the flux residue. When not cleaned it is suitable for non-critical consumer stuff expected to operate in benign environments only; for all other applications, especially anything that must withstand any moisture, or when used for manual soldering (where complete deactivation cannot be achieved), it *must* be cleaned for any kind of reliability.
From: Joerg on 29 Oct 2009 14:00 John Larkin wrote: > On Wed, 28 Oct 2009 19:26:47 -0500, krw <krw(a)att.bizzzzzzzzzzz> wrote: > [...] >> Good explanation (though I think I would have used a disco strobe as >> an example ;). Don't teach her about "delta cycles" until she has the >> basics down. > > I won't, because I have no idea what a delta cycle is. > It's a bicycle: http://www.deltacycle.com/BeltDrive_Bike#at [...] -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: krw on 29 Oct 2009 19:31 On Thu, 29 Oct 2009 11:00:46 -0700, Joerg <invalid(a)invalid.invalid> wrote: >John Larkin wrote: >> On Wed, 28 Oct 2009 19:26:47 -0500, krw <krw(a)att.bizzzzzzzzzzz> wrote: >> > >[...] > >>> Good explanation (though I think I would have used a disco strobe as >>> an example ;). Don't teach her about "delta cycles" until she has the >>> basics down. >> >> I won't, because I have no idea what a delta cycle is. >> > >It's a bicycle: >http://www.deltacycle.com/BeltDrive_Bike#at ;-) It's really VHDL's way of keeping everything from happening at once, while letting it happen at the same time. ;-)
From: John Larkin on 29 Oct 2009 19:35
On Thu, 29 Oct 2009 18:31:28 -0500, krw <krw(a)att.bizzzzzzzzzzz> wrote: >On Thu, 29 Oct 2009 11:00:46 -0700, Joerg <invalid(a)invalid.invalid> >wrote: > >>John Larkin wrote: >>> On Wed, 28 Oct 2009 19:26:47 -0500, krw <krw(a)att.bizzzzzzzzzzz> wrote: >>> >> >>[...] >> >>>> Good explanation (though I think I would have used a disco strobe as >>>> an example ;). Don't teach her about "delta cycles" until she has the >>>> basics down. >>> >>> I won't, because I have no idea what a delta cycle is. >>> >> >>It's a bicycle: > >>http://www.deltacycle.com/BeltDrive_Bike#at > >;-) > >It's really VHDL's way of keeping everything from happening at once, >while letting it happen at the same time. ;-) Clock skew is nature's way... John |