Dear Matt,

we do the same way, as you described. For the junior engineers it is sometimes
hard to learn,
but when we were young, we started at the same low level .....  :-)

Good work for you and your team !

Peter Schoepe
( Elektronik-Service Schoepe )


matt wrote:

> Dear Peter,
>
> As a person who does RF , high speed digital and analog design and
> supervises CAD layout work, I agree with you 100% . It's good when the CAD
> people know more than just what to click to use their CAD tools and actually
> understand the design.
>
> I've seen so many horrendous layout jobs that I came to the conclusion that
> each layout which passes the CAD person's verification and DRC checks must
> undergo a final check done by a qualified engineer (this is part of our
> design verification procedure in our company) . We are very fortunate to
> have found a few good engineers who enjoy both the design and layout aspects
> of their work.
>
> Before that, a normal scenario was for example for the cad operator to route
> a couple of analog 1GHz PLL signals together with some high speed logic
> signals , minimize the logic signals trace length , and leave the PLL traces
> the longest , routed on several layers and having a number of vias on each
> 1GHz signal !  Needless to say , things never worked from the first pass and
> it was always the usual ballet of revisions and ECO's , weeks/months of
> delays and thousands of $$$ wasted .
>
> Best Regards,
> Matt Tudor , MSEE
> Elmar Technologies
> http://personal.lig.bellsouth.net/~mariusrf          consulting
> http://www.rfdatacorp.com           spread spectrum radio telemetry
>
> -----Original Message-----
> From: Elektronik-Service <[EMAIL PROTECTED]>
> To: Protel EDA Forum <[EMAIL PROTECTED]>
> Date: Wednesday, March 28, 2001 1:22 PM
> Subject: Re: [PEDA] Reference
>
> >Dear Matt,
> >
> >Principally you are right. The primary layouter's job is not to think about
> the
> >schematic design,
> > --- b u t  ---
> >electronic engineers "sometimes" are normal human persons and forget  the
> >"easiest" things. :-)
> >So i intend the layout designer always to ask the developer, if he finds
> >something unusual.
> >Therefore it is necessary to know the basics in the analog and digital
> design.
> >I think, if the layout designer doesn't know this, the product will not be
> able
> >to approve the EMI tests of an industrial
> >environment.
> >
> >Peter Schoepe

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