[EFM] Been quiet lately... too much DIY ?

[Augusto Pinoche]

Right i have been using Protel99 both private and in
work for the entire project, some issues are nice and
dandy som are not so nice and dandy.

One interesting issue is when you manually routes
a one or two layer board for audio you usually
have to keep and learn how to do low noise,low
impdance designs who is essential to get a good
performance.

Now if i try to autoroute a one layer audio board the
P99 are incredible bad and newer does a proper job
if i autoroute a 4 or 6 layer mixed signal it does
a wery good job.

Its interesting to see that a router fails at simple
solutions, even the high end routers in the Mentor Board
stations does crappy results on 1 to 2 layer boards!

AP


>From: "Theo" <t.hogers at home.nl>
>To: <synth-diy at node12b53.a2000.nl>, "Paul Perry" <pfperry at melbpc.org.au>
>Subject: Re: [EFM] Been quiet lately... too much DIY ?
>Date: Wed, 31 May 2000 09:22:43 +0200
>
>Sounds like you exspect the auto router to do it all on its own.
>I like to use it more as an interactive tool.
>Power stucture routed by hand.
>Then auto route seclected parts, like busses or all short nets from one IC.
>In some cases the auto routed traces need editing and sometimes the router
>doesn't see the obvious solution.
>Some times it may help if you make things easier for the auto router, eg
>pushing a trace to the other side to make some room.
>This way auto routing realy speeds up board disign, I like it.
>
>Cheers Theo
>
>
>----- Original Message -----
>From: Paul Perry <pfperry at melbpc.org.au>
>To: <synth-diy at node12b53.a2000.nl>
>Sent: Wednesday, May 31, 2000 4:11 AM
>Subject: Re: [EFM] Been quiet lately... too much DIY ?
>
>
> > At 12:31 PM 30/05/00 -0700, a guilty party wrote:
> >  I have even in the past just done routing.  I
> > >get the board, with all the parts placed and netlist loaded, start up 
>the
> > >router, wait five minutes, write out a bill for $500, and return it the
>next
> > >day.  I wish I could make that kind of money all the time. :^)
> > >
> > A complete prick did this to me once (before I knew anything about 
>noise,
> > grounding, EMC etc) and of course the unit was unuseable.
> > Sure, you can get away with autorouting for slow digital or high level
> > audio. Not for analog synths, though.
> >
> > paul 'sadder, poorer, wiser' perry Melbourne Australia
> >
>

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