Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

[Synthesis/STA] PVT vs OCV vs Corner

Status
Not open for further replies.

ivlsi

Advanced Member level 3
Joined
Feb 17, 2012
Messages
887
Helped
17
Reputation
32
Reaction score
16
Trophy points
1,298
Activity points
6,861
Hi All,

What difference between PVT, OCV and Corner?

Is the PVT the Operation Condition?

Is the OCV the variations on a given PVT?

Is the Corner and OCV the same?

Thank you!
 

pandit.vlsi

Junior Member level 1
Joined
Dec 18, 2013
Messages
17
Helped
10
Reputation
20
Reaction score
6
Trophy points
3
Activity points
101
Hi ,
>Is the PVT the Operation Condition?
Yes. This is correct
>Is the OCV the variations on a given PVT?
Yes. This is right. IT may be a process, voltage and temperature
>Is the Corner and OCV the same?
No. This is not correct. Corners are extraction corners. During fabrication, due to process variation, a wire may have diffrent R and C. To cover these foundry will give various corner nxtgrd files.
Using these we have to extract the design in suggested corners and close the timing.
 
  • Like
Reactions: ivlsi

    ivlsi

    Points: 2
    Helpful Answer Positive Rating

ivlsi

Advanced Member level 3
Joined
Feb 17, 2012
Messages
887
Helped
17
Reputation
32
Reaction score
16
Trophy points
1,298
Activity points
6,861
"nxtgrd files" - never heard about these files previously... Could you please provide more details? What information contains these files? How to use them?
What tool can do the RC-extraction?
 

pandit.vlsi

Junior Member level 1
Joined
Dec 18, 2013
Messages
17
Helped
10
Reputation
20
Reaction score
6
Trophy points
3
Activity points
101
Hi,

In P& R when we route the nets, we will be having info about Length and width of the nets.
But we are not sure of R&C of these nets. To get these values we use the nxtgrd files with an extractor (ex:Star-RC, QRC and so on).
nxtgrd used by Star-RC. other tools use other format. These files are given by foundry.
 

    V

    Points: 2
    Helpful Answer Positive Rating

ivlsi

Advanced Member level 3
Joined
Feb 17, 2012
Messages
887
Helped
17
Reputation
32
Reaction score
16
Trophy points
1,298
Activity points
6,861
nxtgrd used by Star-RC. other tools use other format. These files are given by foundry.

How are these files look like? Are they just Look Up Tables to correlate between the route/net Width/Length and corresponded RC values (like in WLM files)?
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top