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2) register duplication is used when the register's loading is very large, to speed up, duplicate the register then the loading is decreased, and transition delay is decreased too.
Inertial delay is like inertia means if any input changes during inertial delay then its effect will not propagate at the o/p.
Transport delay occurs due to switching activity of the circuit.
Suppose any (buffer) circuit having 3 ns inertial delay and 10ns transport delay.
NOTE: o/p at 0ns is 1.
suppose i/p=1 at 0 ns.
i/p=0 at 1ns.
i/p=1 at 5 ns.
i/p=0 at 6ns.
i/p=1 at 7 ns.
i/p=0 at 11ns.
then o/p will be
When inertial delay is taking into account
o/p =1 at 0ns
o/p =0 at 4 ns.
o/p =1 at 10 ns.
o/p =0 at 13 ns.
When transport delay is taking into account then
o/p=1 at 0 ns.
o/p=0 at 11ns.
o/p=1 at 15 ns.
o/p=0 at 16ns.
o/p=1 at 17 ns.
i/p=0 at 11ns.
INERTIAL DELAY of a system is the time required by that system to recognise the changes in its input.So input changes will be reflected at the output if and only if the the input remains stable more than inertial delay.
TRANSPORTATION DELAY is the time required by the system to pass its input changes to output.
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