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V S | 3 May 2009 13:06
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Re: A job opportunity at Mentor


In bad economy and dwindling jobs any job opportunity is a welcome relief to job seekers. Some of my own
colleagues have been seeking job opportunities and asking  me for advice. I had a chance to read this timely
blog "standing out in crowd"

http://alokkjain.blogspot.com/2009/04/resume-20-standing-out-in-crowd.html

An excellent read for anyone seeking job in today's market.

--- On Wed, 4/29/09, Muranyi, Arpad <Arpad_Muranyi@...> wrote:

> From: Muranyi, Arpad <Arpad_Muranyi@...>
> Subject: [SI-LIST] A job opportunity at Mentor
> To: si-list@...
> Date: Wednesday, April 29, 2009, 10:25 PM
> All,
> 
> We have an immediate opening at Mentor in our
> Redmond, WA office.  If you are interested please
> read the job description and job requirements below
> and send any inquiries and resumes to Sunil Sumanth:
> 
> sunil_sumanth@...
> 
> Thanks,
> 
> Arpad

      
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Mick zhou | 5 May 2009 17:12
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Re: TDR impedance measurement and rise time

Istvan,
Well, I should say fortunately we have no serious problems in most
interconnect design practices since we intend to make them low loss etc.

How can a complex value (f-domain) equals a real value (TDR, t-domain) in
general cases?  In High Speed Signal Propagation: Advanced Black Magic by
H.Johnson, sect. 3.6.3, the authors touched the surface of the difficulty by
concluding " Severe degrees of tilt make it very difficult to define one
correct measurement procedure that is best for all appications" (p.172).
Actually I think it is a fundamental problem: how can we define Z in
t-domain that is compatible with Z in f-domain scientifically in general
cases? f-dependent, nonlinear etc.

What we have done is to map Z(f)=V(f)/I(f) into Z(t)=V(t)/I(t), and so
reflection etc. Obviously, these definitions are not compatible even
mathematically. Laplace transformation is not satisfied in general cases.

My point is the current TDR theory has limitations that make some of our
interpretations (struggles) meaningless. However,the difficulty does not
stop our engineering work until it is absolutely necessary to correct the
theory. We don't employ relativity to solve most of our engineering
problems, but it is good to know the limitations of Newton's theory to avoid
unnecessary struggles if we run outside of the territory.  Cheer!

I don't think it is easy to solve this difficulty by emails in this list
unless we want to confuse people more. I'd leave it to theorists again.

Best regards,

Mick
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Jory McKinley | 5 May 2009 21:19
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Contract Work


Hello All,
Thanks to the connections made on this list I have been able to work 3, 6, and 9 month consulting jobs for some
time.  
I am currently completing an assignment and if anyone has work in the SI/PI/Lab area I am available.
Regards,
-Jory 

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colin_warwick | 5 May 2009 22:40
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Free Agilent On-Demand Video: ADS 2009 Signal Integrity Eye Diagram Solutions

Hi,
Wes Ponick has posted a 15-minute on-demand video "ADS 2009 Signal Integrity Eye Diagram Solutions." No
registration required.

The freelists server mangles links with an equal character in them, so you can either modify this one:
  
DELETEMEhttp://wireless.agilent.com/vcentral/viewvideo.aspx?vid=527

...or use this shortened link:

http://bit.ly/12NgfB

Hope this helps,
-- Colin Warwick
Signal Integrity Product Marketing Manager, Agilent EEsof EDA
Blog: http://signal-integrity-tips.com

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Antonio Ciccomancini | 6 May 2009 01:58
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- Innovations workshop -

Dear SI-experts,
on May 12th CST will be hosting a workshop in Bay area, Santa Clara,
focusing on Signal and Power Integrity as well as EMC-EMI and system level
simulations.
Customer presentations with real world applications and challenging problems
in the design of PCBs and packages will be the focal points. For more
details, registration and full agenda, please refer to the following link
http://www.cst.com/Content/Events/Details.aspx?eventId=1218.
Kind regards, Antonio
----------------------------------------------
A.Ciccomancini Scogna
CST of America

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曾真 | 6 May 2009 04:58
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A good job opportunity at EMC: Principal Hardware Engineer-SI

All,

    EMC China R&D Center(Shanghai) is seeking a Principal Hardware Engineer-SI. If you are interested please
read the job description and job requirements below and send any inquiries and resumes to simon:

lmzng@...

Thanks,

simon

=========================================================

Job Title: Principal Hardware Engineer for EMC Shanghai COE

GENERAL SUMMARY

Performs design and development engineering assignments related to hardware products and systems
including development of new products or updates to existing products. Work may encompass one or more
areas of engineering including signal integrity, power integrity, PCB design, or other related fields.
Duties may include research, evaluation, development, and application of new high-speed technologies
and methods into products. May be responsible for developing and conducting test experiments,
developing or executing project plans, evaluating new high-speed tools and technologies, and
documentation of work and results. 

PRINCIPAL DUTIES AND RESPONSIBILITIES

Collaborate with different engineering groups in a fast-paced design environment, voluntarily share
information. Mentor other SI engineers.
Signal integrity design, including SerDes, power, EMI, timing and interconnect simulations and measurements.
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Lakshmi Narayanan Sowrirajan, TLS-Chennai | 6 May 2009 11:04
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Power supply filter design

Hi All,

            For an LDO getting power from switcher I am planning to put
a filter in between to control the noise getting transferred to the LDO.
(The load is very sensitive to the ripples). Can anyone suggest me how
to design this filter...?

            Thanks in advance.

Thanks & Regards

Lakshminarayanan.S

9840250902

DISCLAIMER:
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It shall not attach any liability on the originator or HCL or its affiliates. Any views or opinions
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Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or
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attachments please check them for viruses and defect.
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V S | 6 May 2009 14:23
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Beginners hspice tutorial


I had written a small hspice tutorial for beginners at 

http://referencedesigner.com/tutorials/hspice/hspice_01.php

I would like to know what other topics would you like me to cover in it. If anyone is willing to volunteer to
contribute, I will be glad to hear. The contributor's name and details will be published in the page.

Best,

Vikas Shukla

      
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Istvan Novak | 6 May 2009 17:18
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Re: TDR impedance measurement and rise time

Hi Mick,

I see two related, but independent statements/questions in your 
message.  The answer to "How can a
complex value (f-domain) equals a real value (TDR, t-domain) in general 
cases?" the answer is: it is
doable without loss of accuracy, if done correctly.  The sentence you 
quote "Severe degrees of tilt
make it very difficult to define one correct measurement procedure that 
is best for all appications"
may apply to some laminate materials, but a) it has nothing to do with 
the complex or real nature of
the data, and b) luckily today the typical materials used by the PCB 
industry dont fall into this
category, not at least in the frequency range of common interest for 
digital people.

Regards,

Istvan Novak
SUN Microsystems

Mick zhou wrote:
> Istvan,
> Well, I should say fortunately we have no serious problems in most
> interconnect design practices since we intend to make them low loss etc.
>
> How can a complex value (f-domain) equals a real value (TDR, t-domain) in
> general cases?  In High Speed Signal Propagation: Advanced Black Magic by
> H.Johnson, sect. 3.6.3, the authors touched the surface of the difficulty by
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Istvan Novak | 6 May 2009 17:21
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Re: Power supply filter design

Are you sure you want both an LDO and a filter in front of it? Many 
applications can manage to
achieve sufficient suppression of DC-DC converter switching noise just 
by the LDO itself
(plus a few capacitors, of course, but no additional series element).

Regards,

Istvan Novak
SUN Microsystems

Lakshmi Narayanan Sowrirajan, TLS-Chennai wrote:
> Hi All,
>
>  
>
>             For an LDO getting power from switcher I am planning to put
> a filter in between to control the noise getting transferred to the LDO.
> (The load is very sensitive to the ripples). Can anyone suggest me how
> to design this filter...?
>
>  
>
>             Thanks in advance.
>
>  
>
> Thanks & Regards
>
> Lakshminarayanan.S
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Gmane