🚀 go-pugleaf

On 01/11/2012 08:00 PM, Bill Sloman wrote:
> On Jan 11, 8:10 pm, Jim Thompson<To-Email-Use-The-Envelope-I...@On-My-
> Web-Site.com>  wrote:
>> On Wed, 11 Jan 2012 10:43:15 -0800, John Larkin
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>> <jjlar...@highNOTlandTHIStechnologyPART.com>  wrote:
>>> On Tue, 10 Jan 2012 18:02:50 -0800 (PST),BillSloman
>>> <bill.slo...@gmail.com>  wrote:
>>
>>>> On Jan 10, 4:55 pm, John Devereux<j...@devereux.me.uk>  wrote:
>>>>> Robert Macy<robert.a.m...@gmail.com>  writes:
>>>>>> On Jan 10, 2:28 am,BillSloman<bill.slo...@ieee.org>  wrote:
>>>>>>> On Jan 10, 7:47 am, "David L. Jones"<altz...@gmail.com>  wrote:
>>
>>>>>>>> Just thought some might be interested in hearing our recent guest on
>>>>>>>> our Amp Hour radio show, Dr Howard Johnson of "Handbook of Black
>>>>>>>> Magic" fame:http://www.theamphour.com/2012/01/10/the-amp-hour-77-winsome-waveform...
>>
>>>>>>>> Lots of history of the book, signal integrity, Gigabit Ethernet
>>>>>>>> development, 90 degree PCB bends, audiophoolery, and a whole bunch of
>>>>>>>> other talk over almost 1 1/12 hours.
>>
>>>>>>> "Black Magic" is more notorious than famous. I own both it and it's
>>>>>>> follow-up, and both have got some useful content but they are badly
>>>>>>> organised and what useful content they do contain is hard to find.
>>
>>>>>>> The field is still waiting for a decent textbook on high speed circuit
>>>>>>> design and layout.
>>
>>>>>>> This is one of the few matters on which John Larkin and I seem to
>>>>>>> agree.
>>
>>>>>>> --
>>>>>>> BillSloman, Nijmegen
>>
>>>>>> Perhaps, it is time for the first ever 'conference' book written by a
>>>>>> consortium of engineers/scientists.
>>
>>>>>> Put my name in for proffreading.  :)
>>
>>>>> Great idea. Perhaps John Larkin, Jim Thompson andBillSlomancould
>>>>> collaborate on it.
>>
>>>>> Sure that will work out well... :)
>>
>>>> I'm not sure what Jim Thompson might contribute. I've seen papers that
>>>> worry about the characteristic impedance of connections on the silicon
>>>> (or whatever) inside integrated circuits,
>>
>> Written by clueless PhD's trying the publish or perish route :-)
>
> The authors affiliations seemed to be with the semiconductor firms,
> but that doesn't stop them from being clueless Ph.D.s.
>
>>>> but I don't have the feeling
>>>> that Jim designs stuff that's big enough and fast enough for him to
>>>> need to know much about it.
>>
>> What a fundamental fathead you are, Slowman.  Even Larkin knows I've
>> designed quite a bit of PECL.
>
> We all know that - you tell us about it at every possible opportunity.
> None of its big enough that you are going to have start treating
> interconnection on the chip as transmission lines.

Even large processors are all RC internally.  (Part of my previous job 
was helping set IBM's optical interconnection strategy, so we went over 
all that wire stuff in gory detail.)  There was a DARPA program a few 
years back that tried pushing copper interconnects to much lower 
speed/power points, but inductance never became a big factor.

Cheers

Phil Hobbs


-- 
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058

hobbs at electrooptical dot net
http://electrooptical.net