Diff b/w SPEF,SDF and Incremental SDF ?

[angadir]

incremental sdf

Hi,

Can anybody explain in detail whatz the difference between SPEF,SDF and Incremental SDF ?

Thanks

 

[vlsitechnology]

incremental spef

SPEF is a standard parasitic exchange format which contains Resistance and Capacitance values and the unit is ohms and farads

SDF is standard delay format unit is nanoseconds
Incremental SDF is also same as sdf but it contains only net delays where as SDF contains Net delay as well as Cell delay

Bye take care

 

[angadir]

what is the unit of capacitance in spef

Thanks pal....
Would any one like to add more to this ?

 

[ivlsi]

SDF contains Net delay as well as Cell delay

What about transition delays over the cells? Are they also included in SDF? Always?

Thank you!