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Unformatted text preview: ______________________________________________________ Ch ng 2 Hm Logic II - 1 ___________________________________________________________________________ _________________________________________________________ N guy n Trung L p " CH NG 2 HM LOGIC D HM LOGIC C B N D CC D NG CHU N C A HM LOGIC D ng t ng chu n D ng tch chu n D ng s Bi n i qua l i gi a cc d ng chu n D RT G N HM LOGIC Ph ng php i s Ph ng php dng b ng Karnaugh Ph ng php Quine Mc. Cluskey ___________________________________________________________________________ ____________ N m 1854 Georges Boole, m t tri t gia ng th i l nh ton h c ng i Anh cho xu t b n m t tc ph m v l lu n logic, n i dung c a tc ph m t ra nh ng m nh m tr l i ng i ta ch ph i dng m t trong hai t ng (c, yes) ho c sai (khng, no). T p h p cc thu t ton dng cho cc m nh ny hnh thnh mn i s Boole. y l mn ton h c dng h th ng s nh phn m ng d ng c a n trong k thu t chnh l cc m ch logic, n n t ng c a k thu t s . Ch ng ny khng c tham v ng trnh by l thuy t i s Boole m ch gi i h n trong vi c gi i thi u cc hm logic c b n v cc tnh ch t c n thi t gip sinh vin hi u v n hnh c a m t h th ng logic. 2.1. HM LOGIC C B N 2.1.1. M t s nh ngh a - Tr ng thi logic : tr ng thi c a m t th c th . Xt v m t logic th m t th c th ch t n t i m t trong hai tr ng thi. Th d , i v i m t bng n ta ch quan tm n ang tr ng thi no: t t hay chy. V y t t / chy l 2 tr ng thi logic c a n. - Bi n logic dng c tr ng cho cc tr ng thi logic c a cc th c th . Ng i ta bi u di n bi n logic b i m t k hi u (ch hay d u) v n ch nh n 1 trong 2 gi tr : 0 ho c 1. Th d tr ng thi logic c a m t cng t c l ng ho c m , m ta c th c tr ng b i tr 1 ho c 0. - Hm logic di n t b i m t nhm bi n logic lin h nhau b i cc php ton logic. C ng nh bi n logic, hm logic ch nh n 1 trong 2 gi tr : 0 ho c 1 ty theo cc i u ki n lin quan n cc bi n....
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This note was uploaded on 01/18/2012 for the course INFORMATIK 2011 taught by Professor Phanthuongcang during the Winter '11 term at Cornell University (Engineering School).

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kts2a -...

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