1. si.inp generation
2.
MoveSiInp.pl
a. TransientHspice.pl
b. CapaFinder.pl
3.
Transient Analysis
4.
Entry-point Consideration
5.
HspiceAUTO.pl
a. Spectre2Hspice.pl
b. fallrisetable.pl
6.
librarylist.pl
7.
librarymaker.pl
8.
LibraryCompiler
After MoveSiInp.pl, we need to do a transient analysis on the cells. For our cell characterization, we apply a clock like signal to the pin that is measured. This way, we can measure both the input rising case and input falling case with a sufficient "clock" width. The clock width is sufficient if the output can have full swing at the duration of "1" and "0" cases. An step by step guide is as follows.
Under the nand2x1 folder, type awaves, AvanWaves window will pop up.
Click Design -> Open... An open design window will pop up.
Choose TRANS_nand2x1.sp. Results Browser window will pop up
Choose Transient: *nand2x1.sp. In Types window choose Voltages. In Curves window, double click input and output.
You can then see the following window
From this analysis we can see that we can reduce the "clock" width to about 3ns and the clock period 6ns. Record the value because it will be needed later.