Hi, I am looking for the interpolation function us...
# openroadt
Tayyeb Mahmood
04/26/2023, 3:03 AMHi, I am looking for the interpolation function used with NLDM in static timing analysis, will appreciate any help.
p
Philipp Gühring
04/28/2023, 9:03 AMThe formula here looks like a linear interpolation to me: https://electrotrick.wordpress.com/2018/12/31/timing-delay-models-1/
Philipp Gühring
04/28/2023, 9:06 AMBut I guess you could use more advanced interpolation/extrapolation functions as well
Philipp Gühring
04/28/2023, 9:08 AMIf you are interested in the interpolation function that is used by openlane, I think opensta does it
t
Tayyeb Mahmood
04/28/2023, 9:12 AMYes, openSTA uses bilinear interpolation, but I dont know whether it is a good idea, because atleast in Sky130 std cell libraries, transition times and load caps have geometric spread.
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