18Bit Binary weighted DAC layout placement

Status
Not open for further replies.
V

vadim888

Member level 2
Joined
Feb 4, 2013
Messages
46
Helped
5
Reputation
10
Reaction score
5
Trophy points
1,288
Visit site
Activity points
1,596
18Bit Binary matrix DAC layout placement

Hi all!

I need help.

My issue is find best way to placement (switching) 18 bit Binary matrix (array).
Maybe someone can help me or just give a tips or algorithm.

In my opinion I can't use the Q2 random walk algorithm or I just not understand.
 
Last edited:

Help me please, I really need an advice.
 
Last edited:

Re: 18Bit Binary matrix DAC layout placement

vadim888 said:
My issue is find best way to placement (switching) 18 bit Binary matrix (array).

In my opinion I can't use the Q2 random walk algorithm ...
Click to expand...

I think you're right: the Q2 random walk algorithm isn't appropriate for such a symmetry requiring task (both re. placement and routing), nor is the simulated annealing algorithm (Cadence, Dragon). Maybe the new DPlace engine can do a better job, or the Kraftwerk placement algorithm, but these I don't know. Anyway I'd recommend to use manual PnR for such an accuracy needed.
 
Re: 18Bit Binary matrix DAC layout placement

Dankeschön

Can you give a link for reading the manual PnR?
 

Re: 18Bit Binary matrix DAC layout placement

vadim888 said:
manual PnR?
Click to expand...

It means: manual Placement and Routing. I.e. DIY! The only way to achieve sufficient symmetry for such a high-resolution converter, IMHO. You could ask such companies like Analog Devices and Co.
 

I am not optimistic that you'll meet 18 bit accuracy without
some sort of trim. We found it necessary in the 12-bit days.
On the plus side, trim will fix what simple placement can't.

You should consider segmenting your higher order bits and
distributing them throughout the array, and making them all
out of unit cells (*2^N). This increases the wireball but does
help uniformity.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…