Debdut
Full Member level 3
Hello,
I have done a circuit using cascaded RC networks (like a Elmore delay model) and at each point it has 1 ps delay. The circuit has, say, 100 RC networks, giving a total delay of 100 ps.
Now, due to process variations and mismatch in the RC values, the delay may change.
So what do I do? Suppose the actual overall delay is 105 ps, then should I consider that each RC network has a delay of 1.05 ps?
I was thinking like breaking the circuit into parts and measuring the delay of each part of the circuit. Like, if I break the circuit into 4 parts, and, say, the delays are 25 ps, 27 ps, 25 ps, 28 ps, Then, should I take the mean average or rms average of these values? If I take rms average, then into how many parts should the circuit broken?
Is the method ok?
I have done a circuit using cascaded RC networks (like a Elmore delay model) and at each point it has 1 ps delay. The circuit has, say, 100 RC networks, giving a total delay of 100 ps.
Now, due to process variations and mismatch in the RC values, the delay may change.
So what do I do? Suppose the actual overall delay is 105 ps, then should I consider that each RC network has a delay of 1.05 ps?
I was thinking like breaking the circuit into parts and measuring the delay of each part of the circuit. Like, if I break the circuit into 4 parts, and, say, the delays are 25 ps, 27 ps, 25 ps, 28 ps, Then, should I take the mean average or rms average of these values? If I take rms average, then into how many parts should the circuit broken?
Is the method ok?
