Ubuchwepheshe, Electronics
D-trigger: isimiso yokusebenza, itafula iqiniso
Trigger - kweyunithi aphansi akha digital othomathikhi ezimbili isimo ukuzinza, enye yazo inikezwa ngenani "1", kanye nezinye - "0".
Esikhathini indlela ukugcwaliseka uxhumano okunengqondo ukuhlukanisa lezi zinhlobo ezilandelayo amadivaysi: T-flip-flop, D-flip-flop, JK-flip-flop, RS-trigger. Yiqiniso, lapha kukhona kukho ezivamile, kodwa ngaphandle kwabo kukhona amadivaysi othomathikhi kanye nezinye izinhlobo.
Kulesi sihloko, sithatha sihlolisise D-trigger. umshini wathi has a ulwazi olulodwa (D) input, Ngakho-ke, kuhloswe ukuba kusebenze umsebenzi isikhathi ukubambezeleka.
Umgomo we operation
Isici kwesibalo Q (t + 1) = Dut uchaza ukusebenza lolu hlobo idivayisi ezifana D-flip-flop. Ithebula iqiniso (Ithebula ukuhwebelana) kulo mshini isimo aboniswe ngezansi.
| Q t | D t | Q (t +1) |
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
Njengoba singabona, e owokuqala umugqa wesine amasignali amagugu Q ngezikhathi t t +1 luqondane. Okungukuthi, abangabantwana D-flip-flop liyisici isignali ukubambezeleka. Ngenxa yalokho amadivaysi uhlobo indlela ehlongozwe engatholakali isicelo sabo, nemibono ekhishwa bayophindaphinda isignali okufakwayo nge ukubambezeleka ezincane isikhathi.
D-uhlobo flip-flop yakhiwa ka zokuvumelanisa olulodwa-level (owodwa esigabeni) kanye Duplex (ezimbili-esiteji) RS-amadivaysi yohlobo olufanayo. Lezi imishini isebenze ngokuvumelana shintsha ithebula.
Single-esiteji D-flip-flop ingase amisiwe kusukela ungqimba elilodwa zokuvumelanisa RS-apharathasi begodu omunye FUTHI-HE1, okuyinto uxhuma ulwazi ezivamile (D) uvo ezimbili D-ephambene inhlamvu input.
Ngezinye kokuthola bacabanga zero on iwashi okokufaka RS uhlobo othomathikhi logic nanye ezingeni ivinjiwe oluxube okukhiphayo KANYE-CHA 2 futhi KANYE-CHA 3. Lapho kushintshwa ukuvumelanisa isignali ezingeni isetshenziswa okokufaka idatha, noma kudala zero okunengqondo ngesikhathi S zokufakwayo (at D = 1) noma eR zokufakwayo (D = 0) le indlela inhlamvu T. Kuyoba ushintshele ku isimo elihambisana ezingeni okunengqondo D. Single- D-uhlobo flip-flop kubambezela Lokusakaza okokufaka ngesikhathi ikhefu phakathi amasignali ukuvumelanisa.
D-flip-flop nge control ashukumisayo. Job Description, umdwebo obusebenzayo
kudivayisi okuzenzakalelayo yalolu hlobo yakhiwa ka ezintathu RS-trigger indlela hlobo. Zisekelwe NAND, bobabili benze umsebenzi usuke, kanti eyesithathu okukhiphayo. Imiphumela inhlamvu usuke yakhelwe ukulawula inhlamvu okukhiphayo.
Lapho ezingeni isignali C elilingana zero okunengqondo, ukukhipha i-okokufaka inhlamvu enikeziwe kuyo kokungathathi hlangothi isignali inhlanganisela, futhi esitshalweni imodi USB. Uma uguqula isignali Imininingwane usuke icuphe kwimodi yokulala, futhi isitshengiselo Okokufaka logic kwesisodwa inhlamvu okokufaka C i nika amandla, ekhishwa automaton isethelwe isimo esisha okuhambelana isignali ulwazi D-okokufaka emjikelezweni odlule.
Esimeni lapho isignali Imininingwane ezingeni ushintsho kuyokwenzeka ukufakwa okukhipha isignali inhlamvu uma idivayisi usuke aluphumeleli. It kuvela ukuthi injongo ukushintsha inhlamvu yokwamukela amasignali ulwazi, ukudlulisa ukuba idivayisi okukhiphayo ngesikhathi ushintsho okokufaka isignali ngaleso control okokufaka C kusukela logic zero bacabanga elilodwa isignali latching kusukela impendulo sikokufaka ulwazi.
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