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Propagation delay for carry lookahead adder

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Apr17-08, 07:55 PM
P: 25
1. The problem statement, all variables and given/known data

1) I'm using a 4 bit carry lookahead adder to build a 8 bit parallel adder. I'm to calculate the maximum propagation delay time, assuming each gate introduces a unit time of propagation delay. I'm assuming not carry lookahead generators.

Would it just be 8 units of propagation delay?

2) If I had a 16 bit adder using carry lookahead generators, what would the maximum propagation delay time, assuming each gate introduces a unit time of propagation delay.

Thanks
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