in timing report what is meant by statistical adjustment value? In place stage the value is zero and in CTS the value is added , can u please explain in brief
Hello Sir, I have some concern with Pocvm Gaurdbanding slides, if we use this Gaurdbanding for other variations than the Random variation i.e. voltage and temperature , this gaurdband value gets multiply with distance based derating also … that is not correct right? No fab explains about derating the distance based derate again!! Also why would we want to derate the sigma value with this Gaurdbanding? Voltage and temperature derates are supposed to be incremental derates on existing POCVM derates which means no multiplication is required!! All derates should be incrementally used!! This is what is mentioned by Fabs like TSMC 7/5 nm Signoff docs, they have not mentioned a single word about Gaurdbanding rather they have clearly mentioned that derates are needed to be applied with -incr switch only!!! Expecting a reply from your side!! After that we can discuss it more!
The calculation for Delay of cell = Mean + (C*Mean*N),, where Mean is the nominal delay of cell, and N is the standard deviations ,, with this we are covering complete variation, then again what is the use of Pocv Coefficient C in the formula ?? can anyone explain clearly to me
Thank you. Systematic variation is deterministic in nature and is proportional to the cell location of the path being analyzed. Examples of systematic variations are variations in gate length/width and interconnection width.These variations basically relate to proximity effects, density effects and the relative distance of devices. The cell path distance is determined by computing the diagonal of a cell bounding box which encompasses all of the cells in the path. Note, path distance is calculated separately for cells and nets, because a timing analysis tool assumes the locations of the nets in a path do not affect the systematic variation of the cells in the path.
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Thanks mahendra for making pocv things clear... Kudos to u..
No problem. Thanks for watching.
This is a wonderful video, thanks a lot for your effort!!
Good information .Plz do as many videos as possible.
Glad to hear that. I’ll try my best 😊
hey can u please explain what is exactly nominal delay?
What is statistical adjustment in 3 sigma timing reports can you please explain?
Amazing video , thank you so much.
Please advise , what would be meaning of cell check variation in yor presentation ?
Thanks a lot for such informative video
You’re welcome.
What is nominal delay?
in timing report what is meant by statistical adjustment value? In place stage the value is zero and in CTS the value is added , can u please explain in brief
Thanks lot sir !! very helpful !!
Glad to hear that. Thanks for your feedback.
Is socv different from pocv analysis?
Hello Sir, I have some concern with Pocvm Gaurdbanding slides, if we use this Gaurdbanding for other variations than the Random variation i.e. voltage and temperature , this gaurdband value gets multiply with distance based derating also … that is not correct right?
No fab explains about derating the distance based derate again!!
Also why would we want to derate the sigma value with this Gaurdbanding? Voltage and temperature derates are supposed to be incremental derates on existing POCVM derates which means no multiplication is required!! All derates should be incrementally used!! This is what is mentioned by Fabs like TSMC 7/5 nm Signoff docs, they have not mentioned a single word about Gaurdbanding rather they have clearly mentioned that derates are needed to be applied with -incr switch only!!!
Expecting a reply from your side!! After that we can discuss it more!
Very Good Information
Thank you. Glad to hear that.
The calculation for Delay of cell = Mean + (C*Mean*N),, where Mean is the nominal delay of cell, and N is the standard deviations ,, with this we are covering complete variation, then again what is the use of Pocv Coefficient C in the formula ?? can anyone explain clearly to me
Hi Sir, i have one doubt, can you explain how AOCV derates impacts on Half-cycle paths & CRPR?
aocv has no impact of clock edge
Very informative,please make videos on annotation fixes
Thank you. I’ll think about that later.
Can you explain CRPR concept
Nice information
Thank you
What is the purpose of Corner? btw thanks for details :)
Hi sir, Great video can you please explain what is systematic variation and what does the distance in table Indicate I mean distance between what?
Thank you.
Systematic variation is deterministic in nature and is proportional to the cell location of the path being analyzed. Examples of systematic variations are variations in gate length/width and interconnection width.These variations basically relate to proximity effects, density effects and the relative distance of devices.
The cell path distance is determined by computing the diagonal of a cell bounding box which encompasses all of the cells in the path. Note, path distance is calculated separately for cells and nets, because a timing analysis tool assumes the locations of the nets in a path do not affect the systematic variation of the cells in the path.
@@mmkr Thank you sir
You’re welcome
can we add chapters with timestamp? easier to navigate the video that way.
Thanks for your suggestion, I’ll try to do it later.
super thanks
hola