D-trigger: umgaqo wokusebenza, itafile ye nyaniso

I-Trigger iyisisithi sokuqala esisisigxina somshini we-digital kunye namaqondo amabini azinzileyo, enye enye eyabelwe ixabiso "1", enye inikwa "0".

Ezi ntlobo zezixhobo zilandelayo ziyaziwa ngendlela yokufezekiswa kokuxhamla okunengqiqo: T-flip-flop, D flip-flop, JK flip-flop, RS flip-flops. Ngokuqhelekileyo, apha zidweliswe kwiindlela eziqhelekileyo, kodwa ngaphandle kwazo kukho iifowuni ezizenzekelayo zezinye iintlobo.

Kule nqaku siya kuqwalasela ngokubanzi iinkcukacha zeD-trigger. Umatshini uneenkcukacha enye (D) yokufakelwa, ngoko yenzelwe ukuphumeza umsebenzi wokulibazisa ixesha.

Umgaqo wokusebenza

I-equation yeQ equation Q ( _{t + 1} ) = Dt ichaza ukusebenza kwalolu hlobo lwecebo, njengeD-flip-flop. Itheyibhile ye nyaniso (itafile ).

Njengoko ubona, kumqolo wokuqala kunye wesine, ixabiso leempawu ze-Q kwixesha lexesha t ne-t + 1 livumelana. Oko kukuthi, i-D flip-flop yinto yokulibaziseka kwempawu. Ngenxa yoko, izixhobo ezicatshangelwayo zoluhlobo olungabonakaliyo alufumananga isicelo sabo, kuba umphumo uya kuphinda uphawu lokufakelwa ngexesha elide lokulibala.

I-D-trigger yoluhlobo oluhambelanayo lwakhiwe kwinqanaba elilodwa (inqanaba elilodwa) kunye namanqanaba amabini (amanyathelo amabini) i-RS-devices of the same type. I-automate ekhankanywe ngokusebenzayo ngokwetafile yenguqu.

Isigaba esisodwa se-D flip-flop sinokuqhutywa kwinqanaba le-RS kunye ne-AND1 HE1 kunye ne-AND1 HE1 edibanisa iimpembelelo zombini ze-D kwi-D flip-flop kwingcaciso enye (D) yokufakelwa.

Xa i-zero enengqiqo igalelo kumnikelo wokuvumelanisa, umatshini we-RS othomathiweyo ovimba ngokuzenzekelayo uvinjiwe lizinga leyunithi elungileyo kwimiphumo ye-NAND ₂ ne-NAND ₃ izakhi. Ukuba uphawu lokuvumelanisa luyatshintshwa, izinga lokunikwa kwenkcazo yolwazi luya kudala i-logic zero kwi-input S (kwi-D = 1) okanye kwi-R yokufakazela (i-D = 0) ye- trigger ye-T . Iya kutshintshela kwimeko ehambelana neqondo logic. Uhlobo lwe-D lubambezela ukusabalalisa kwegalelo kwithuba lokumisa isikhashana phakathi kokuvumelanisa iimpawu.

D-uqalise ngokulawula okunamandla. Inkcazo yomsebenzi, umzobo osebenzayo

Isixhobo esizenzekelayo solu hlobo sakhiwa kwiintlobo ezi-3 ze-RS zolu hlobo oluthile. Zakhiwe kwizinto ze-NAND, kunye nezo zibini zenza umsebenzi wokuguqula, kwaye yesithathu isiphumo. Izibonakaliso zemveliso zezinto zokutshintsha ziguqulwe ukulawula ukuphuma kwezinto.

Kwinqanaba lesiganeko C elilinganayo kwi-zero enengqiqo, ukudibanisa ukungathathi hlangothi kwempawu kufaka iimpembelelo zesiphumo sokuphuma kwaye sitshintsha kwimodi yokugcina. Xa igugu lenkcazelo litshintshwa, ukuguqula ukuguqula kuya kwimodi yokulinda, kwaye ngokukhawuleza ukuba umqondiso kwiqela elungileyo lifike kwi-input input ye-trigger C, i-automaton yesiphumo isetyenziswe kwimeko entsha ehambelana nomqondiso wolwazi kwi-input input kwi-cycle yangaphambili.

Ukuba utshintsho kwinqanaba lomqondiso wolwazi lwenzeka ngexesha lokusekwa kweflip-flop, ngoko amadivaysi okutshintshi awayi kuphona uphawu. Kuye kwenzeka ukuba injongo yokuguqula ibangelwa ukufumana iimpawu zomnxeba, ukuzithumela kwisiphakamiso kwisixhobo sokuvelisa ngexesha lokutshintshwa kwesiginci kwi-input input C ukusuka kwinqanaba elinengqiqo ukuya kwiyunithi enengqiqo kunye nokuzikhusela kwizenzo zesignali kwi-input input.