measuring buffer delay in cadence

[mohamed mahmoud]

how can i measure delay of simple cmos buffer (2 cascaded min sized inverters)?
measure delay of each inverter and sum them ??

 

[jirika]

The delay is output load dependant. So when you'll know output cap then it's the simple question of charging RC couple.

 

[mohamed mahmoud]

i need to know the intrinsic delay of buffer (which is not dependent on load)

 

[erikl]

Measure the delay for 2 or more known load capacitances. Plot delay vs. capacitance and extrapolate for Cload=0 .

 

[kenambo]

Hi,
You can measure the delay between Buffer Input and Buffer output..
And actually it is a sum of inverter delays..
Thanks