Theo Markettos <theom+news@chiark.greenend.org.uk> wrote in
news:Z8y*bt8uu@news.chiark.greenend.org.uk: 

> In sci.electronics.cad David Simpson <d-simpson@comcast.net> wrote:
>> For those speeds, you'll want to use ADS (I forget the full namae)
>> for routing and simulations.  I think Expedition and Allegro can
>> handle those speeds for 100% digital, but I know ADS can, and in
>> analog, no one touches them a high speed stuff (analog over ~3GHz).
> 
> Thanks, I presume you mean Agilent Advanced Design System rather than
> any part of the Allegro alphabet soup.  Looks like they have a
> university program, so I'll take a look.

I think so, everyone I knew just called it ADS.  I do know it's neither 
Mentor or Cadence, or wasn't at that time.

BTW, this is VERY high end.  As in, if you measure the curcuit after 
layout, it will then tell you what/where to trim pads (traces are done  
autmaticly) to get a perfect curciut.





-- 
  _______________________________________________
 /                David Simpson                  \
|             dsimpson@NOnyxSPAM.net              |
|          http://www.nyx.net/~dsimpson           |
|We got to go to the crappy town where I'm a hero.|
 \_______________________________________________/

In sci.electronics.cad David Simpson <d-simpson@comcast.net> wrote:
> For those speeds, you'll want to use ADS (I forget the full namae) for 
> routing and simulations.  I think Expedition and Allegro can handle those 
> speeds for 100% digital, but I know ADS can, and in analog, no one 
> touches them a high speed stuff (analog over ~3GHz).

Thanks, I presume you mean Agilent Advanced Design System rather than
any part of the Allegro alphabet soup.  Looks like they have a university
program, so I'll take a look.

> BTW, ADS designs can be exported to either tool, and you might plan that, 
> because their drawing tools (fab and assembly) are trully basic, or they 
> were a few years ago.

Useful to know...

Theo

Theo Markettos <theom+news@chiark.greenend.org.uk> wrote in
news:Z8y*xl0uu@news.chiark.greenend.org.uk: 

> 
> Can anyone give recommendations for PCB programs for high speed
> digital design?  By high speed I mean up to 10Gbps, though relatively
> simple boards. I've done 6Gbps in Eagle and it worked, but there was
> no way to verify the performance without fabbing the board and
> measuring it. 
> 
> It looks like we have some options of:
> 1. Cadence Allegro Design Authoring, Allegro PCB Designer, Allegro
> SI/PI, etc 2. Cadence Allegro Designer CIS (OrCAD Capture CIS),
> Allegro PCB Designer, 
>    Allegro SI/PI, etc
> 3. Mentor (Expedition, HyperLynx)
> 
> (Hope those are the right tools, the vendors have rather too many that
> are similarly-named)
> 
> Any suggestions for which to look at?  This isn't a full time
> activity, so a tool which is easy(ier) to pick up as you go along
> without years of training would be handy.  Cost is not an issue
> (academic licensing). 
> 
> Thanks
> Theo

For those speeds, you'll want to use ADS (I forget the full namae) for 
routing and simulations.  I think Expedition and Allegro can handle those 
speeds for 100% digital, but I know ADS can, and in analog, no one 
touches them a high speed stuff (analog over ~3GHz).

BTW, ADS designs can be exported to either tool, and you might plan that, 
because their drawing tools (fab and assembly) are trully basic, or they 
were a few years ago.



-- 
  _______________________________________________
 /                David Simpson                  \
|             dsimpson@NOnyxSPAM.net              |
|          http://www.nyx.net/~dsimpson           |
|We got to go to the crappy town where I'm a hero.|
 \_______________________________________________/

Can anyone give recommendations for PCB programs for high speed digital
design?  By high speed I mean up to 10Gbps, though relatively simple boards. 
I've done 6Gbps in Eagle and it worked, but there was no way to verify the
performance without fabbing the board and measuring it.

It looks like we have some options of:
1. Cadence Allegro Design Authoring, Allegro PCB Designer, Allegro SI/PI, etc
2. Cadence Allegro Designer CIS (OrCAD Capture CIS), Allegro PCB Designer,
   Allegro SI/PI, etc
3. Mentor (Expedition, HyperLynx)

(Hope those are the right tools, the vendors have rather too many that are
similarly-named)

Any suggestions for which to look at?  This isn't a full time activity, so a
tool which is easy(ier) to pick up as you go along without years of training
would be handy.  Cost is not an issue (academic licensing).

Thanks
Theo