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The different types of optimizations change your board in order to
reduce the total trace length and via count.
<p>
Arguments:
<p>
<table border=1 cellspacing=0>
<tr><th> debumpify
<td> Looks for U-shaped traces that can be shortened or eliminated.
<tr><th> unjaggy
<td> Looks for corners which could be flipped to eliminate one or more
corners (i.e. jaggy lines become simpler).
<tr><th> simple
<td> Removing uneeded vias, replacing two or more trace segments in a row
with a single segment. This is usually performed automatically after
other optimizations.
<tr><th> vianudge
<td> Looks for vias where all traces leave in the same direction. Tries to
move via in that direction to eliminate one of the traces (and thus a
corner).
<tr><th> viatrim
<td> Looks for traces that go from via to via, where moving that trace to a
different layer eliminates one or both vias.
<tr><th> orthopull
<td> Looks for chains of traces all going in one direction, with more
traces orthogonal on one side than on the other. Moves the chain in
that direction, causing a net reduction in trace length, possibly
eliminating traces and/or corners.
<tr><th> splitlines
<td> Looks for lines that pass through vias, pins, or pads, and splits them
into separate lines so they can be managed separately.
<tr><th> auto
<td> Performs the above options, repeating until no further optimizations
can be made.
<tr><th> miter
<td> Replaces 90 degree corners with a pair of 45 degree corners, to reduce
RF losses and trace length.
</table>
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