bv_cvxbook_extra_exercises

an the dynamic range d of the system is dened as d

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Unformatted text preview: + R4 ) + (C1 + C2 + C3 + Cload1 )R1 T3 = (C6 + Cload3 )(R1 + R4 + R6 ) + C4 (R1 + R4 ) + +(C1 + C2 + C3 + Cload1 )R1 + (C5 + Cload2 )(R1 + R4 ). Our main interest is in the maximum of these delays, T = max{T1 , T2 , T3 }. (a) Explain how to ﬁnd the optimal trade-oﬀ curve between area A and delay T . (b) Optimal area-delay sizing. For the speciﬁc problem parameters given, plot the area-delay trade-oﬀ curve, together with the individual Elmore delays. Comment on the results you obtain. (c) The simple method. Plot the area-delay trade-oﬀ obtained when you assign all wire widths to be the same width (which varies between Wmin and Wmax ). Compare this curve to the optimal one, obtained in part (b). How much better does the optimal method do than the simple method? Note: for a large circuit, say with 1000 wires to size, the diﬀerence is far larger. For this problem you can use the CVX in GP mode. We’ve also made available the function elm_del_example.m, which evaluates the three delays, given the widths of the wires....
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This note was uploaded on 09/10/2013 for the course C 231 taught by Professor F.borrelli during the Fall '13 term at University of California, Berkeley.

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