Ln 4 5 1 5 1 2 1 29 5 1 805 ns since there is a 25 1

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ln 4 5 - 1 5 - 1  + 2 1 ( 29 5 - 1 = 8.05 ns Since there is a 2.5 :1 ratio in transistor sizes, t PLH = t PHL , t P = t PHL = 8.05 ns and t r = t f = 2 t PHL = 2 t P = 16.1 ns
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