. A simple but high speed interface to the
PC is something that is not easily available at this time. I hope to
change that with this project.
Darrell Harmon
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cycles with no delamination problems.
I was able to pay extra and get ENIG finish for PCI Express fingers
too.
Darrell Harmon
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, paddia, polyclear and maskclear in
addition to the usual BGA parameters.
It would be possible to add a PGA mode to footgen, but I don't want a
patch as they are relatively rare.
Darrell Harmon
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right.
http://www.excelta.com/product_categories/spatulas-oilers/products/010-black-micro-spatula
Those are some tiny bond pads.
I can't really help with epoxy selection. What I use is expensive,
hard to get and has high curing temperatures.
Darrell Harmon
lower.
As shunt caps, all 0402 parts have too much series inductance to do
much good above a few GHz. The only difference between values seems to
be where the series resonance is.
Darrell Harmon
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in the 1 to 100 pF range
frequently had parallel resonances in the 10 to 30 GHz range. Most of
the multilayer caps (10 nF to 1 uF) performed well to at least 30 GHz.
I like to use 3 terminal feedthrough capacitors when I am concerned
about frequencies 1 GHz getting on the power supply.
Darrell
that
* *
* *
* *
* *
patch attached.
Cheers,
Levente
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I have applied it, and committed to Subversion. It will be in the next release.
Darrell
or are you
getting an old file? Caching proxy?
Darrell Harmon
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,
Levente
--
Levente Kovacs
http://logonex.eu
I have applied this and your bug fix patch.
The current version can be found in Subversion at
svn://dlharmon.com/geda/tools/footgen
or at
http://dlharmon.com/geda/footgen.html
Darrell Harmon
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into a high data
rate by only having 18 pins in each direction and needing to move 250
MB/s in each direction.
Darrell Harmon
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to tell from the ones Advanced Circuits routed. The
FR4 dust was bad, so you may want to wear a mask if you do it this
way.
Darrell Harmon
On Tue, Mar 31, 2009 at 8:18 PM, DJ Delorie d...@delorie.com wrote:
Just got a box of panels from Advanced Circuits. Five panels, ten
boards per panel (two
of the board. Plated slots are expensive to add to
prototype boards.
Darrell Harmon
On Sat, Dec 20, 2008 at 6:59 PM, gene carzr...@optonline.net wrote:
could someone take a look at this data sheet:
http://www.spctechnology.com/prodinfo/specs/84N1167.PDF
Here's a picture of it:
http
or go for a digital scope.
Darrell Harmon
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I am not sure your request is specific enough. I have attached the
footprint for a Molex Mini Fit Jr 2x2 pin straight header which I
assume may be what you are looking for. This is the same connector as
the PC motherboard 12V power connector.
Darrell Harmon
On Sat, Aug 23, 2008 at 2:22 AM, Igor2
?
For sierra, you can just draw the outline with a 10 mil line on the top
copper layer. I do it all the time. I just got a board back Thursday
that I submitted that way.
In the future it would really be nice to allow drawing on the soldermask
layer.
Darrell Harmon
will want to etch a few boards.
Darrell Harmon
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as well.
Darrell Harmon
Darrell Harmon
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workaround will add a very large
propagation delay (and more gates). You may need additional pipeline
stages.
I assume you are just wanting cosine? If so, your last idea should
work nicely with minimal additional gates.
--
Darrell Harmon
http://dlharmon.com
that was required, but I haven't seen the opencores
implementation.
--
Ben Jackson AD7GD
CORDIC should be able to handle +90 to -90 degrees with no prerotate
stage. With the addition of a 90 degree prerotate stage, the range
becomes -180 to +180 degrees.
--
Darrell Harmon
http://dlharmon.com
to solid. Without the
spoked thermals, PCB is responsive again. I can email the files if
anyone wants. The speed issue is not a problem for me as I want all
of those vias to not have thermals.
--
Darrell Harmon
http://dlharmon.com
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I used 0.020 Kester 331 solder with a 2331ZX flux pen and a Metcal STTC
099 (0.060 bent chisel) soldering iron tip. It worked great.
Darrell Harmon
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it connects to either).
Darrell Harmon
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the comments at the beginning
of the code for details. I did drop the part that offsets the part width
on by 30 mils to maintain compatibility with old files. I also applied a
few bugfixes that had been sent to me. Any future features or bugfixes
are welcome.
Darrell Harmon
like to send it to me. I have had
one bugfix for omitballs on BGA in my inbox for months. I have also
mentioned doing a CGI interface to footgen, and am still planning on
doing that in the near future unless someone else would like to take on
that task.
--
Darrell Harmon
http://dlharmon.com
columns of pins. I then rearranged them into 10 different symbols
(1 for each bank, 1 for power, one for configuration).
http://dlharmon.com/geda/mksym.c
--
Darrell Harmon
http://dlharmon.com
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