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

[Richard Wilbur]

On Aug 16, 2017, at 23:28, "mike.valk at gmail.com" <mike.valk at gmail.com> wrote:
> 
> 2017-08-17 1:01 GMT+02:00 Richard Wilbur <richard.wilbur at gmail.com>:
>>> On Aug 15, 2017, at 23:31, Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:
>>> if i just take *out* the ground intermediary traces that would do the
>>> trick of bringing the impedance back up, is that right?
>> 
>> Should be a major step in the right direction.
>> 
> 
> How about the ground plane below the traces... That's a major stray
> capacitance and closer than the "narrow" surrounding GND traces?

The ground plane would be stray except we designed it into the single-ended and differential impedance.  At this point it is integral to our differential microstrip geometry.  (See my original post in the thread "HDMI High-Frequency Layout:  Impedance".)