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Forums > Digital IC > Floorplanning, Place and route

Subject: static and dynamic (power + IR) analysis
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kulprashant05
Posts: 0
Online: User is Offline
9/01/2007 5:26 AM  
Hi,

I wanted to know what is difference between followings

1. Power analysis and IR drop analysis

2. Static power analysis and Dynamic power analysis

3. Static IR drop and Dynamic IR drop analysis

what parameters or constraints we have to be considered?

how to provide leakage current or power while doing analysis?

why we should do Power or IR analysis at the stage of Floorplan and what are paramaters will be considered here?
and how it is different from the post layout (routing done) stage?

Please suggest me or any docs or links

Thanks & Regards,
KulPrashant 
clsantos
Posts: 31
Online: User is Offline
9/14/2007 5:05 AM  
Maybe this whitepaper could be a kickoff for your IRdrop questions:
http://www.cadence.com/whitepapers/4101_PowerGridVerif_WP.pdf

Cristiano
pjayasekharan
Posts: 10
Online: User is Offline
9/20/2007 11:45 AM  
1. power analysis is power estimation while IR is the ir drop estimation.
2. static power is the average power consumed in a ckt. Dynamic is the peak power consumed in a ckt including all transient conditions. Dynamic is more accurate.
3. static ir analyis - based on average power of each cell the ir drop to the cell is calculated.
dynamic - ir drop at different instance of time is avaialabe for every cell.
obviously dynamic is more accurate especially in shrinking geomtry nodes.
leakage power if from the libraries. floorplan stage is just for basic idea and its nowhere accurate as the post layout stage. clocktree makes a significant impact to the
grid.

-regds
prakash
kulprashant05
Posts: 0
Online: User is Offline
9/20/2007 9:30 PM  
Thanks Prakash & Cristiano.

Regards,
Prashant
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Forums > Digital IC > Floorplanning, Place and route > static and dynamic (power + IR) analysis


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