delay measurement with modelsim

[dhanasingaraja]

Hi,

I wanna measure delay of a ripple carry adder from modelsim simulation.program works fine.I can see the output waveforms also.but i can't find any delay between inputs and output even with zoom view also.i have attached my output screenshot


pls..... help me

 

[Sceadwian]

There is no attachment, you'll also need to post the schematic along with the trace.

 

[dhanasingaraja]

this is my output wavewform

 

[Sceadwian]

That waveform is useless without a schematic. And if this is a simulator then you won't see a delay, most simulators use behavioral models for logic gates not simulated silicon, you'd have to get the delay from the datasheet of the actual hardware you'll be using.

 

[crutschow]

You need a Spice type simulator to show circuit delays.