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Date: | Mon, 17 Dec 2012 10:18:55 +0100 |
Message-ID: | <CACwWb3BvZj-sr_63yFiD8gO0NwXD47rtibqBEaAD2LMvf6de1w@mail.gmail.com> |
Subject: | Re: [geda-user] Find rat lines |
From: | Levente <leventelist AT gmail DOT com> |
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--e89a8ff1c584e0959804d108de2b Content-Type: text/plain; charset=ISO-8859-1 On Mon, Dec 17, 2012 at 4:37 AM, Peter Stuge <peter AT stuge DOT se> wrote: > John Doty wrote: > > Short circuits involve engineering intention > > What? The short circuit discussed here is about separate nets in the > netlist being connected together by copper in a design. > > > Take the situation when you have A_GND and D_GND net for analogue and digital ground. You WANT to short it in one point. I usually do it with a 0 Ohm resistor, or I short the nets in PCB. > > > The only bad thing with PCB's method is the highlighting of shorts > > > > I don't think that a program can reliably deduce the intention of > > the designer here > > I don't think anyone is working toward such a goal. Why do you think > that? > > The goal is to visualize violations of intent - nets connected > together in spite of being separate in the netlist - in the most > useful way possible, to save the board designer's time searching > for the violating connection. > > > //Peter > --e89a8ff1c584e0959804d108de2b Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable <br><br><div class=3D"gmail_quote">On Mon, Dec 17, 2012 at 4:37 AM, Peter S= tuge <span dir=3D"ltr"><<a href=3D"mailto:peter AT stuge DOT se" target=3D"_bla= nk">peter AT stuge DOT se</a>></span> wrote:<br><blockquote class=3D"gmail_quot= e" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> John Doty wrote:<br> > Short circuits involve engineering intention<br> <br> What? The short circuit discussed here is about separate nets in the<br> netlist being connected together by copper in a design.<br> <div class=3D"im"><br> <br></div></blockquote><div><br>Take the situation when you have A_GND and = D_GND net for analogue and digital ground. You WANT to short it in one poin= t. I usually do it with a 0 Ohm resistor, or I short the nets in PCB.<br> <br>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;b= order-left:1px #ccc solid;padding-left:1ex"><div class=3D"im"> > > The only bad thing with PCB's method is the highlighting of s= horts<br> ><br> </div><div class=3D"im">> I don't think that a program can reliably = deduce the intention of<br> > the designer here<br> <br> </div>I don't think anyone is working toward such a goal. Why do you th= ink<br> that?<br> <br> The goal is to visualize violations of intent - nets connected<br> together in spite of being separate in the netlist - in the most<br> useful way possible, to save the board designer's time searching<br> for the violating connection.<br> <span class=3D"HOEnZb"><font color=3D"#888888"><br> <br> //Peter<br> </font></span></blockquote></div><br> --e89a8ff1c584e0959804d108de2b--
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