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finding critical path of a cmos circuit

Hi,

Im working on a final project for a digital design course and I have a
question regarding how to find the sizes of different logical gates in
order to minimize the delay across the circuit (effectively the
critical path). I have a picture of the path if i get your email, if
not here is a sketch of it.

cin (2*cunit) -> 2 input OR -> 2 input AND -> 2 input OR -> 2 input
AND -> 2 input OR -> 2 input AND -> 2 input OR -> 2 input XOR -> 16
cunit

cunit is a parameter we use in class. cunit = capacitance of an
inverter.

This is the path and the question is how to size all this stuff such
that the delay is minimized. Any help would be appreciated as the
project is due Wednesday night!

Thank you.

Paul
 
J

Jim Thompson

Jan 1, 1970
0
Hi,

Im working on a final project for a digital design course and I have a
question regarding how to find the sizes of different logical gates in
order to minimize the delay across the circuit (effectively the
critical path). I have a picture of the path if i get your email, if
not here is a sketch of it.

cin (2*cunit) -> 2 input OR -> 2 input AND -> 2 input OR -> 2 input
AND -> 2 input OR -> 2 input AND -> 2 input OR -> 2 input XOR -> 16
cunit

cunit is a parameter we use in class. cunit = capacitance of an
inverter.

This is the path and the question is how to size all this stuff such
that the delay is minimized. Any help would be appreciated as the
project is due Wednesday night!

Thank you.

Paul

I suggest you re-read the course material before Wednesday night ;-)

...Jim Thompson
 
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