[Arm-netbook] HDMI High-Frequency Layout: Recommendations--Taper

Luke Kenneth Casson Leighton lkcl at lkcl.net
Sun Dec 17 05:12:59 GMT 2017


... yyyyeahhh.... that looks better, doesn't it?

the left outer track is shuffled forward by... errr.... sqrt(2) / 4 * 5mil
the one in from that (HTX2P) doesn't need shuffling as it's right next
to the green pair...
the right outer one (HTXCN) by 3x that amount
the next one in (HTXCP) by 2x that amount
the next one in (HTX0N) by 1x that amount
HTX0P is right next to the green pair which is dead-straight so
doesn't need shuffling

so if i've got this right, the separation gap intra-pair should remain
at 5.0 mil, and when all the pairs get close together at the end they
should again be exactly 5.0 mil apart even on the 45 degree bending.

whewwww :)

i think that's it (oh, except the step needs adjusting to 15mil not
5mil as it is now).  now i have to identify where in the PADS file the
rectangle for the keepout area is, add *that* to the parser as well,
then do the same maths and create a tethered keepout area.  *sigh*...

l.
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