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From: Joel Koltner on 18 Apr 2008 12:50 "Joerg" <notthisjoergsch(a)removethispacbell.net> wrote in message news:0SSNj.2092$7Z2.69(a)newssvr12.news.prodigy.net... > Errr, well, those sure sound like ivory tower statements. For some reason > all the phenolic I ever used has never smelled. Maybe you're missing those receptors in your nose? :-) I've found that phenolic has a much stronger smell than FR-4... not necessarily all that "malodorous" vs. any other common board materials, but definitely a lot more noticeable. > Sometimes I wish that professors had more nose-to-the-grindstone industry > work under the belt. I mean real design work where cost is a big factor. > Otherwise they are going to tell students they should use Rogers for just > about everything ... Yep, that is a problem. Have you been to something like IEEE's MTT-S recently? It really is a different world, and unfortunately the same part of our culture that now says you need a BSEE to be an oscilloscope salesman is, I think, what has made it much more difficult for working engineers to enter academia. Becoming a EE professor is now seen as a career in and of itself, rather to the preclusion of of being a "practicing" engineer where you have significant cost constraints. ---Joel
From: Joel Koltner on 18 Apr 2008 13:05 "David L. Jones" <altzone(a)gmail.com> wrote in message news:b60473de-efdf-458a-aae3-ebc5ea85b9e6(a)a1g2000hsb.googlegroups.com... > 5) Hit the "add subnet jumper" feature and it finishes the tracks and > does all the pin swaps for you and updates the schematic. Sounds like a really nice feature, David -- thanks for the tip.
From: Joerg on 18 Apr 2008 13:10 Joel Koltner wrote: > "Joerg" <notthisjoergsch(a)removethispacbell.net> wrote in message > news:0SSNj.2092$7Z2.69(a)newssvr12.news.prodigy.net... >> Errr, well, those sure sound like ivory tower statements. For some reason >> all the phenolic I ever used has never smelled. > > Maybe you're missing those receptors in your nose? :-) I've found that > phenolic has a much stronger smell than FR-4... not necessarily all that > "malodorous" vs. any other common board materials, but definitely a lot more > noticeable. > Possibly :-) Just went over to the lab and took a sniff. The really old dark versions might have a wee scent but the newer more light boards don't. The shepherd looked at me quite puzzled when I sniffed the boards. So she took a sniff as well but walked away upon dicovering that it ain't edible. If there were a stench she'd have sneezed. >> Sometimes I wish that professors had more nose-to-the-grindstone industry >> work under the belt. I mean real design work where cost is a big factor. >> Otherwise they are going to tell students they should use Rogers for just >> about everything ... > > Yep, that is a problem. Have you been to something like IEEE's MTT-S > recently? It really is a different world, and unfortunately the same part of > our culture that now says you need a BSEE to be an oscilloscope salesman is, I > think, what has made it much more difficult for working engineers to enter > academia. Becoming a EE professor is now seen as a career in and of itself, > rather to the preclusion of of being a "practicing" engineer where you have > significant cost constraints. > IEEE also needs step onto the real world of engineering, and soon. Else member retention will become a problem. I'd be interested in teaching once I retire but the bureaucratic hurdles are so high that it might have to be in a more private setting, without academic institutions, colleges or schools involved. I am not going to spend thousands on a teaching credential just to appease some bureaucrat. And the students must be motivated, otherwise I won't do it. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Chuck Harris on 18 Apr 2008 14:05 Joerg wrote: > > I'd be interested in teaching once I retire but the bureaucratic hurdles > are so high that it might have to be in a more private setting, without > academic institutions, colleges or schools involved. I am not going to > spend thousands on a teaching credential just to appease some > bureaucrat. And the students must be motivated, otherwise I won't do it. Teaching doesn't require much in the way of credentials for university level. Getting on the tenure track is an entirely different matter. If you want to teach, head off to see the dean of your local university/community college, and ask what they need. Not much money, but it still can be a very satisfying experience. -Chuck
From: qrk on 18 Apr 2008 14:10
On Thu, 17 Apr 2008 17:52:38 -0700, "Joel Koltner" <zapwireDASHgroups(a)yahoo.com> wrote: >"Joerg" <notthisjoergsch(a)removethispacbell.net> wrote in message >news:ZjRNj.9697$2g1.9469(a)nlpi068.nbdc.sbc.com... >> Not anymore. Part of my daily bread is earned salvaging designs where >> someone thought "Oh, it's just slow stuff". But it ain't grampa's old SN7400 >> anymore, today's logic chips are fast. > >OK, ok, good point. Doesn't someone now have a logic family that's purposely >been slowed down due to this "problem?" > [snippage] You can control edge rates (drive current) on FPGAs, at least the Xilinx families we use. Amazing how simple you can make a DDR2 memory interface to a FPGA with a little thought. We get by with no terminations with beautiful looking signals. That saves a lot of power and board area. --- Mark |