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ELP 304 : Cours 2 Circuits combinatoires Michel Jézéquel…

ELP 304 : Cours 2 Circuits combinatoires Michel Jézéquel…

ELP 304 : Cours 2 Circuits combinatoires Michel Jézéquel…

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L’additionneur complet permet de prendre encompte une retenue entrante C k− 1A k00001111Les opérateurs arithmétiques :les additionneursB k00110011retenueentranteC k-101010101page 23 <strong>ELP</strong> <strong>304</strong> <strong>Cours</strong> 2retenuesortanteC k0 00 10 11 00 11 01 01 1S ksommeÉquations logiques del’additionneur complet:SCkk==A k .B k>=1AA⊕ B⊕ Ck k k −1k. Bk+ ( Ak⊕ Bk) Ck−1B k A k C k-11/2 add.A k ⊕ B k1/2 add.C k(A k ⊕ B k ).C k-1S k =A k ⊕B k ⊕C k-1

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