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Which university produces good analog EEs?

Discussion in 'Electronic Design' started by Joerg, Sep 25, 2007.

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  1. krw

    krw Guest

    You'd better have a 50% gross margin, in that business. At the cost
    of the fab and the support people (forgetting inventory and the
    inevitable losers), it's a necessity. China doesn't seem to have
    economics as its first priority, as US companies must.
     
  2. krw

    krw Guest

    Yes, on chips this is no problem but no company has marketed those
    individually at a decent price. Meaning the sub-10uA references are
    usually not very suitable for mass production because you can't have a
    reference in there that costs more than all the rest of the board. So we
    have to use tricks such as pulsing and storing.

    One reason why POR/BOR circuits contain precise references is that the
    chips they are on need it elsewhere as well. For example, a uC with an
    ADC on board. The often touted "cheat reference" consisting of four
    equal resistors hung onto the rail doesn't cut the mustard.
    We didn't have much luck with UCLA so far. They didn't understand my
    module specs and couldn't even solder. Had to let them go. Europe would
    be an option but the immigration procedure is a real hassle. Plus there
    will be an expensive international move required unless you catch them
    right after their degree. Europe doesn't have such an extreme shortage
    of analog guys because larger companies there are often foolish. Some of
    them consider anyone over 40 a geezer that needs to be replaced by a
    kid. The consequences are very visible, for example with NXP's web site.
    [/QUOTE]

    Oh yeah, the lack of soldering skills. That would require the student
    to have actually built something. These younguns just know how to
    program. You've seen the posts where a pic uP is the solutions to any
    task, not a state machine comprised of memory elements and
    combinational logic.
    [/QUOTE]
    For the vast majority of applications, a uC is the right solution,
    certainly over the discrete implementation you suggest.
     
  3. John Larkin

    John Larkin Guest

    From commies to neocons, in one generation!

    John
     
  4. Nah, they're just as greedy, opportunistic and short-sighted, just
    with lower costs and a different environment. Warms the cockles of
    your heart, it does.


    Best regards,
    Spehro Pefhany
     
  5. Joerg

    Joerg Guest

    Neat! I wonder what the achievable loop bandwidth would be ...


    I guess many of us wonder about that. I remember dropping a tool into my
    2nd shortwave power amp. BADABANG! 5kV on the plates and an oil-cooled
    transformer the size of a shoe box. It could push all the gusto of a
    230V/16A circuit into the HV node if needed. The amp before that was
    built when I head no money for luxuries such as transformers so I rigged
    up a tripler from 230VAC to around 900VDC. Tons of caps, lots of power.
    Of course, German power plugs are not keyed ... One day one of the caps
    decided it was time. Ceiling lights dimmed, me scratching my head
    because there was no dimmer. Phssst ... BAM! The can had taken a chunk
    out of the ceiling plaster and whitish fluff rained down on me. Oh man,
    if I would have had my face over that amp.
     
  6. Joerg

    Joerg Guest

    Good luck selling, won't be easy these days :-(

    A friend did that years ago and found Arkansas to be a good place. He
    said they don't tax you out of the house there. Unfortunately he had a
    fatal stroke a few years later.
     
  7. krw

    krw Guest

    Yeah, buyers are pretty slim. Amazingly the higher-end and the
    bottom stuff is selling. The stuff in the middle is sitting. We've
    had some interest, but they all have had something to sell too.
    We're looking at KY, though if I find something (long term) that's
    interesting we'll go wherever. I'm kinda picky though. I've turned
    down some possibilities that didn't look all that great. I think I
    can afford to retire in KY, though I really don't want to. I'm doing
    a short-term contract in OH now just to keep from going insane (and
    help pay VT taxes). The work is fine but being away from home sucks.

    I had a run-in with A-Fib early this year and am on medications that
    keep my BP rather low (half of what it was when I was in A-Fib and
    the sphygmomanometer tilted), so I hope I can escape a stroke. My
    brother had one a few years ago. He still has many resulting from it
    and can't talk well. His was likely caused by the doctors mucking
    with his heart though.
     
  8. krw

    krw Guest

    I disagree. Many of their businesses make no sense, other than as
    loss-leaders to "build market share". Of course many corporate
    yahoos here are falling for the line and investing in China too.
    Kinda like the Japaneese a couple of decades ago.
     
  9. Guest

    The problem with using a uP in such projects is if you are designing a
    chip, you need to know how to do it with gates as often that is the
    smallest and lowest power solution. The ability to hand craft logic is
    disappearing rapidly, but is very much needed in mixed mode chips
    which are not done on fine geometry processes.
     
  10. JosephKK

    JosephKK Guest

    posted to sci.electronics.design:
    Oh yeah, the lack of soldering skills. That would require the
    student to have actually built something. These younguns just
    know how to program. You've seen the posts where a pic uP is the
    solutions to any
    task, not a state machine comprised of memory elements and
    combinational logic.[/QUOTE]

    For the vast majority of applications, a uC is the right solution,
    certainly over the discrete implementation you suggest.
    [/QUOTE]

    The problem with using a uP in such projects is if you are designing
    a chip, you need to know how to do it with gates as often that is
    the smallest and lowest power solution. The ability to hand craft
    logic is disappearing rapidly, but is very much needed in mixed mode
    chips which are not done on fine geometry processes.[/QUOTE]

    OK. I know this might sound a bit weird but, it seems that mixed mode
    in not chasing minimum geometry devices like digital is. I can see
    some reasons for this, but some of the issues can be reduced by some
    thoughtful scale reduction. Is the issue that the tools cannot keep
    up?
     
  11. Jim Thompson

    Jim Thompson Guest

    On Wed, 03 Oct 2007 06:46:04 GMT, JosephKK

    [snip]
    Sub 0.18u devices leak like sieves... not very conducive to quality
    analog work.
    No. Models is models is models....

    ...Jim Thompson
     
  12. What's the reason that you can't make, say, 10u or 2u devices on a
    0.18u process?

    Best regards,
    Spehro Pefhany
     
  13. John Larkin

    John Larkin Guest

    There's the wirebond issue, too. Lots of chips are size-limited by the
    i/o connections, so there's no point in making the devices smaller. A
    billion dram bits on a chip is good, but a million opamps doesn't make
    sense.

    John
     
  14. Jim Thompson

    Jim Thompson Guest

    You can, except the 0.18u feature-size VERTICAL dimension is still
    there, plus the doping levels are still the same as well.

    HOWEVER, I work regularly on mixed device processes. The current
    project has multiple diffusions and implants, so I have 3V, 2V and
    1.25V devices available.
    ...Jim Thompson
     
  15. Joerg

    Joerg Guest

    If that A-Fib isn't treatable in a classic way check this out:

    http://www.prorhythm.com/HIFU_ablation_catheter.htm

    Unfortunately they went with a bit too much flashplayer glitz so I
    cannot see the site well. If you ever take that route rest asssured that
    the patient iso has been designed by yours truly :)
     
  16. krw

    krw Guest

    If you're designing a chip you aren't going to be using a PIC, now
    are you? Hint: you won't likely be using "memory elements" and
    combinatorial logic to build state machines either.
     
  17. Guest

     
  18. krw

    krw Guest

    Mine was. Just a jump start, after six weeks on Coumadin, two of
    which I was also on Lovenox (*expensive*).
    Interesting. They talked about ablation (not for me) and a friend
    had it done. I was never clear why/how it worked. That site
    explained it rather simply.
    I'm hoping I don't have to go through that again. What a pain,
    daytime TV sucks, and not cheap either.

    From what JohnL has said, he likely did the guts of the MRI machine I
    was inspecting the innards of, too. Good company here! ;-)
     
  19. John Larkin

    John Larkin Guest

    No, I only do the gradient drivers for small-bore stuff, like 4" and
    8" machines for imaging lab animals, and even smaller micro-imaging
    systems. Those can be dinky but fast high-precision, 100 amp, 170-volt
    (17 KW per axis!) drivers. The full-body stuff is much higher power,
    always switchers (Copley is pretty good) and slower and a lot noisier.

    I had my head MRI'd earlier this year (spare me the predictable
    witticisms, guys) and it was noisy and mostly boring. It's the
    gradient coils that make the noise.

    John
     
  20. nimo

    nimo Guest

    thank u very much u just raised my hope i thought that our
    universities in egypt are so what too say primative in practical and
    specially
    in analog design
    but for a change
    i think analog/mixed design is reviving again it's the chance
    i my self am designing a VGA for a communication channel AFE
    well it may be a sand particale compared to the whole design but those
    digital geeks using VHDL and denying the ability of human
    to get new designs of his own can't do it never because it just need
    the talent and someone loves Transistors
    Analog era will never end it's the backbone of every thing even
    digital they just need the finnest as they need less numbers these
    days
    any way if someone knows a college in US that will help an egyption
    student like me to get his master at in analog/mixed design
    (considering i can't be a penny)
    i'll be glad of him

    yours
    gad elsayed,mina
     
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