Power vs load capacitor in Hspice

[taranom1]

Hello,

I used .data command for earning Power in various Cloads, but its Value in Transient Analysis didn't change! but for various VDDs it changes.

Should I use .Alter command?

my code:

.TRAN 10n 100n SWEEP DATA = D1
.data d1

CLOAD 3fF 3.5fF 4fF 4.5fF 5fF
.enddata

 

[erikl]

... its Value in Transient Analysis didn't change!

Try and run an .ac analysis instead.

 

[taranom1]

Thanks erikl, Sorry I was busy,
My Project is A Full Adder and I need do Several Analysis,So Should I write every Analysis in another .sp file?
as far as i knew for ac Analysis I should use ac Sources but my Sources Are Pulse.How about Mix Sources?
here is my code :

VA  A  Gnd PULSE (0 vdd 200ps 100ps 100ps 5ns 10ns)
.
.
.

.TRAN 10n  100n sweep  data = d1
.data d1
VDD 0.5 0.65  0.8
.enddata
.
.
. 
.AC  DATA = d2
*.data d2
*CLOAD   1fF    2fF    3fF    4fF    5fF
*.enddata
********************frequency sweep***************
.AC DEC 4  100MEG  500MEG

 

[erikl]

... I need do Several Analysis,So Should I write every Analysis in another .sp file?

Not necessary.

as far as i knew for ac Analysis I should use ac Sources but my Sources Are Pulse. How about Mix Sources?

ac sources, yes. No mixed sources.

BTW: Cap power is always CV² , isn't it?