Just what I needed.... an excuse to work through the documentation. I'm
close to the worst case newbie because I don't know pcb or any other layout
package. In reality I've been around PCBs and their manufacture for quite a
while, I have just never been directly responsible for PCB layout. When I
designed electronics in a prevous life, we had a PCB designner that did all the
layout. If I get annoying just smack me.
The last sentence in the definition of annulus seems ambiguous:
annulus
The donut-shaped ring of copper that surrounds the hole of a pin
or via. Note
that in pcb, the size of a pin or via is the overall diameter of
the annulus, not
the distance from the outer edge of the hole to the outer edge
of the annulus.
However, if we refer specifically to the size of the annulus, we
mean that distance.
I'm not sure "which" distance the last sentence refers, "overall diameter" or
"distance from the outer edge to the hole to the outer edge of the annulus"
In the definition of netlist, I think that the last sentence is ambiguous; at
best it is a huge oversimplification:
netlist
A list if symbolic electrical connections, normally provided as
input to pcb
from a schematic layout program, which represents the desired
electrical
connectivity of the board. When the netlist and the board agree,
the board
is done.
The simplest thing to do is remove the sentence. In reality there are too many
attributes to list of a board that is "done". This might also be referring to
the condition where all the rats defined by the netlist are represented by
traces. If that is the case then maybe it would be better to say something
about how "board layout is the process of placing traces in the layout that
represent the rats in the netlist" And "a board is not complete until all the
rats defined in the netlist are represented by traces in the layout"
BTW, I found reading the terminology an excellent way to add clarity to the
conversations on the mail list. However, I doubt that it will make me sound
any smarter as I post a comments since that will require more than a good
vocabulary 8^)
----- Original Message ----
From: DJ Delorie <[EMAIL PROTECTED]>
To: [email protected]
Sent: Saturday, November 24, 2007 11:23:32 PM
Subject: gEDA-user: [pcb] terminology
I worked on the terminology section of the getting started doc. If
some of the newer PCB users could review it and see if I've missed
anything (i.e. terms I'm so used to that I don't know they need
defining), let me know.
http://www.delorie.com/pcb/docs/gs/
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