Ntawm technologyElectronics

D-txhais: lub operating hauv paus ntsiab lus, ib tug qhov tseeb rooj

Txhais - ib lub tsev tsev constituting ib cov tsis siv neeg ob-lub xeev stability, ib tug uas yog muab ib tug nqi "1", thiab lwm yam - "0".

Nyob rau hauv tus qauv ntawm lub realization ntawm cov zajlus kom sib txuas paub qhov txawv cov nram qab no ntawm pab kiag li lawm: T-flip-ntog, D-flip-ntog, JK-flip-ntog, RS-chiv keeb tuaj. Ntawm cov hoob kawm, ntawm no yog cov feem ntau cov kev xaiv, tab sis sib nrug los ntawm lawv muaj tsis siv neeg pab kiag li lawm thiab lwm yam kev.

Nyob rau hauv no tsab xov xwm, peb yuav ib tug los ze zog saib D-txhais. Hais tias lub tshuab muaj ib cov lus qhia (D) input, yog li ntawd, nws yog npaj los siv rau ib lub sij hawm ncua muaj nuj nqi.

hauv paus ntsiab lus ntawm cov lag luam

Cov yam ntxwv ntawm tus kab zauv Q (t + 1) = Dt piav lub lag luam ntawm no hom ntawm ntaus ntawv xws li D-flip-ntog. Qhov tseeb lub rooj (Rooj zaus) rau lub xeev no tshuab yog qhia hauv qab no.

Q t D t Q (t + 1)
0 0 0
0 1 1
1 0 0
1 1 1

Raws li peb tau pom, nyob rau hauv tus thawj thiab tus plaub kab ntawm qhov tseem ceeb Q Pib ntsais koj teeb ntawm lub sij hawm t thiab t + 1 coincide. Hais tias yog, tus D-flip-ntog yog ib lub teeb liab ncua caij. Raws li ib tug tshwm sim ntawm lub asynchronous hom xav pab kiag li lawm yog tsis tau pom lawv daim ntawv thov, raws li cov zis yuav rov hais dua cov tswv yim lub teeb liab nrog ib tug me me lub sij hawm ncua.

D-hom flip-ntog yog lub tsev ntawm synchronous ib leeg-theem (ib leeg-theem) thiab ob lub tsev (ob-theem) RS-pab kiag li lawm ntawm lub tib lub hom. Cov cav tov khiav lag luam raws li txoj kev hloov lub rooj.

Ib leeg-theem D-flip-ntog tej zaum yuav configured los ntawm ib tug txheej ntawm synchronous RS-apparatus thiab ib tug THIAB-HE1, uas txuas nyob rau hauv ntau cov lus qhia (D) tswv yim ntawm ob tug D-rov qab tswv yim txhais.

Thaum tau txais daim ntawv ntawm ib tug logic pes tsawg rau ntawm lub moos tswv yim RS hom automatic logic-ib theem sim nrog hais outputs THIAB-TSIS 2 thiab THIAB-TSIS 3. Thaum hloov cov sync teeb liab theem thov mus rau cov ntaub ntawv tawm tswv yim, los yog tsim ib tug muaj kuab pes tsawg ntawm lub tswv yim S (ntawm D = 1) los yog nyob rau hauv lub tswv yim R (nrog D = 0) lub asynchronous txhais T. Nws yuav hloov mus rau lub xeev coj mus rau cov zajlus kom theem D. Single- D-hom flip-ntog ncua lub tawm ntawm lub tswv yim ntawm cov nres ntawm synchronizing Pib ntsais koj teeb.

D-flip-ntog nrog dynamic tswj. Txoj hauj lwm hauj lwm, tej daim duab

Tsis Siv Neeg ntaus ntawv ntawm no hom yuav ua lub tsev ntawm peb RS-txhais asynchronous hom. Lawv yog raws li nyob rau hauv Nand, ob leeg ua lub switching muaj nuj nqi, thiab qhov peb yog cov qhov tso zis. Lub outputs ntawm lub switching txhais tsim los tswj cov qhov tso zis txhais.

Thaum cov theem ntawm teeb liab C sib npaug zos rau ib zajlus kom pes tsawg, mus tso zis ib tug txhais inputs nkag mus rau nws nruab nrab teeb liab ua ke, thiab nws yog hloov mus rau lub cia hom. Thaum hloov ntaub ntawv teeb liab switching ua nyob rau hauv hom pw tsaug zog, thiab ib lub teeb liab yog cov tswv yim rau ib tug pab kom logic ib txhais tswv yim C, tso zis hauv lub Automaton yog teem rau ib tug tshiab lub xeev uas sib raug rau cov ntaub ntawv teeb liab nyob rau hauv D-tswv yim nyob rau hauv lub yav dhau los voj voog.

Nyob rau hauv lub rooj plaub uas cov ntaub ntawv teeb liab theem kev hloov yuav muab qhov chaw thaum lub sij hawm lub installation ntawm cov zis txhais teeb liab thaum lub switching ntaus tsis dhau. Nws hloov tawm hais tias lub hom phiaj ntawm switching txhais yog tus txais tos ntawm cov ntaub ntawv tseg, hloov lawv mus rau lub tso zis ntaus ntawv thaum lub sij hawm ntawm cov tswv yim kev hloov lub teeb liab ntawm qhov kev tswj cov tswv yim C los ntawm ib tug logic pes tsawg mus rau ib tug logic ib tug thiab ib tug qoj teeb liab los ntawm lub tswv yim nyob rau hauv cov ntaub ntawv cov tswv yim.

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