delay measurement in hspice

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vaishakprathap

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Hi everyone
Please help me with the delay measurement in HSPICE through graph as well as writing '.measure' command in the netlist.
I actually have the doubt that if we are taking two inputs A and B suppose in EXOR Gate and an output Y then how would the command be given?
Its something like-
.meas tran tdlay TRIG v(A) val=0.9 TD=0N Rise=1 TARG v(Y) val=0.9 TD=0N Fall=1
then how would the overall delay between input and output be measured?
Do we need to give two seperate commands like this...one for B and Y as well....and then taking the average....or there is some other procedure.
And i think i am not exactly clear with what delay is measured in digital circuits....is it overall delay between input and output...or something else..
Please explain...
 

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