Not necessarily true, Igor - there are many more detailed analyses, but 
take at look at http://www.ultracad.com/90deg.pdf as an example.

At 08:24 AM 8/15/2002 +1000, you wrote:
>I would not recommend anyone to use 90deg corners as you will run into the 
>emc problems.
>
>Igor
>
>-----Original Message-----
>From: Narinder Kumar [mailto:[EMAIL PROTECTED]]
>Sent: Wednesday, 14 August 2002 9:50 PM
>To: Protel EDA Forum
>Subject: Re: [PEDA] Matched Lenghth Constraint
>
>
>Hi Mr. Malik,
>
>1 . Connection at 90 degree means the trace will place at at 90 degree on
>bending like
>
>                                     _______________
>                                    !
>                                    !
>     ---------------------!
>
>     2  45 degree mean on bends trace will be 45 degree
>     3   Rounded mean on bends the trace will be rounded.
>
>And 66 MHz is not so high so you may use any one you like.
>
>Narinder
>Solectron Invotronics
>
>
>
>----- Original Message -----
>From: "Adeel Malik" <[EMAIL PROTECTED]>
>To: "Protel EDA Forum" <[EMAIL PROTECTED]>
>Sent: Tuesday, August 13, 2002 9:36 AM
>Subject: [PEDA] Matched Lenghth Constraint
>
>
> > Hi All,
> >          I want to apply a matched-length constraint to the signals
> > connected to the bus. In the Protel Design Rule dialog, there are mainly 2
> > parameters to specify, one is Tolerance (whose purpose is obvious) and the
> > other is Connection style. In connection style there are three options 1)
>90
> > degree 2) 45 degree and 3) Rounded. Alongwith them there are also options
>of
> > Amplitude and Gap.I couldn't understand these options so Can someone tell
>me
> > how these options are utilized effectively while routing a bus running at
> > 66MHz.
> >
> > Regards,
> > ADEEL MALIK
> >
snip


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