數(shù)電-作業(yè)答案

ASICApplication-SpecificIntegratedComputer-AidedCompactCentralComplexProgrammableLogicDualIn-lineDigitalVersatileField-ProgrammableGateHardwareDescriptionIntegratedInternetLarge-ScaleMultichipMedium-ScaleNonrecurringPrivateBranchPrinted-CircuitProgrammableLogicPrinted-WiringSurface-MountSmall-ScaleVHSICHardwareDescriptionVLSIVeryLarge-ScaleIntegrationABELAdvancedBooleanEquationLanguageCMOSComplementaryMetal-OxideSemiconductorDDPPDigitalDesignPrinciplesandPracticesJPEGJointPhotographicExpertsGroupMPEGMovingPictureExpertsOKOKAlthoughweusethiswordhundredsoftimesaweekwhetherthingsareOKornot,wehaveprobablyrarelywonderedaboutitshistory.Thathistoryisinfactabriefone,thewordbeingrecordedin1839,thoughitwasnodoubtincirculationbeforethen.MuchscholarshiphasbeenexpendedontheoriginsofOK,butAllenWalkerReadhasconclusivelyprovedthatOKisbasedonasortofjoke.Someonepronouncedthephrase“allcorrect”as“oll(ororl)correct,”andthesameorsomeoneelsespelledit“ollkorrect,”whichabbreviatedgivesusOK.Thistermgainedwidecurrencybybeingusedasapoliticalsloganbythe1840DemocraticcandidateMartinVanBuren,whowasnicknamedOldKinderhookbecausehewasborninKinderhook,NewYork.Aneditorialofthesameyear,referringtothereceiptofapinwiththesloganO.K.,hadthiscomment:“frightfulletters...significantofthebirth-placeMartinVanBuren,oldKinderhook,asalsotherallyingwordoftheDemocracyofthelateelection,‘a(chǎn)llcorrect’....Thosewhowearthemshouldbearinmindthatitwillrequiretheirmoststrenuousexertions...tomakeallthingsO.K.”[FromtheAmericanHeritageElectronicDictionary(AHED),copyright1992byHoughtonMifflinCompany]PERLAccordingtosome,it’s“PracticalExtractionandReportLanguage.”ButtherelevantPerlFAQentry,inperlfaq1.pod,says“neverwrite‘PERL’,becauseperlisn'treallyanacronym,apocryphalfolkloreandpost-factoexpansionsnotwithstanding.”(ThankstoAnnoSiegelforenlighteningmeonthis.)真值輸入輸入000011101111由真值表可以看出，該電路與一個(gè)2輸入或門（OR2）相同2.3將下面的十六進(jìn)制數(shù)轉(zhuǎn)換成二進(jìn)制數(shù)和八進(jìn)制數(shù)9E36.7A16=1001111000110110.01111012=117066.36482.5將下面的數(shù)轉(zhuǎn)換成十進(jìn)制數(shù)8(a)11010112=107(b)1740038=63491(c)101101112=183(d)67.24=6*81+7*80+2*8-1+4*8-2=55.3125822(g)120103=138(h)AB3D16=43837(i)(j)2.7將下面的二進(jìn)制數(shù)相加，所有的進(jìn)位**要進(jìn)S：1001101S:1010001C:S:101000000C:S:11011111C:寫出下面每個(gè)十進(jìn)制數(shù)的8位符號(hào)—數(shù)值、二進(jìn)制補(bǔ)碼、二進(jìn)制反碼表示：+25、+120、+82、42、6、111?！嗤?hào)位為0。對(duì)負(fù)數(shù)，規(guī)定其符號(hào)—數(shù)值碼為對(duì)應(yīng)整數(shù)的符號(hào)—碼為對(duì)應(yīng)整數(shù)的反碼。(a)+25原碼00011001碼000110010001(b)+120原碼0111100001111000補(bǔ)碼:0111(c)+82原碼01010010反碼:01010010補(bǔ)碼:0101–42原碼:10101010反碼:11010101補(bǔ)碼–6原10000110反碼:11111001補(bǔ)碼:1111–111原碼11101111反碼:10010000補(bǔ)碼:1001 下面8位二進(jìn)制補(bǔ)碼相加時(shí)是否發(fā)生溢出1101010010111111+11101011+110111110101110101100001+00110001+00011111解

111010100+1110101111011111110111111+1101111111001111001011101+001100011000111001100001+0001111110000000Oct31對(duì)應(yīng)日期為10月31日，Dec25應(yīng)日期為12月25日***2.18下面每個(gè)算術(shù)運(yùn)算至少在某一種計(jì)數(shù)制中是正確的。試確(a) (b)(c) (d)(e) 意基數(shù)表示對(duì)應(yīng)的十進(jìn)制值可以由公

D

r得到。設(shè)操作數(shù)基數(shù)為r，將等號(hào)兩邊變?yōu)槭M(jìn)制數(shù)的運(yùn)算（a）=6r3+6r2+6r1+6r0等式右邊=6r3+6r2+6r1+6r0=等式左邊，數(shù)碼最大值為6，所以，基數(shù)為大于6的整數(shù)4r11r（b）（c）

3r31r3

，可得4r+1=3r+9，