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Which model is used for the power estimation?

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Which model is used for the power estimation?

(a) gate-level model

(b) layout model

(c) circuit model

(d) switch model

I got this question during an online interview.

Enquiry is from Levels of Hardware Modelling in portion Specification of Embedded Systems

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Correct choice is (a) gate-level model

To explain I would say: The gate level model is used to denote the boolean functions and the simulation only consider the behaviour of the gate. This model is also useful in the power estimation since it provides accurate information about the signal transition probabilities.

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