D-aji amfilifa - abin da shahararsa?

Audio amfilifa D-Class - a na'urar tsara don haifa da sigina ciyar da zuwa shigar da na'urar, tare da taimakon abubuwa na shigar da kewaye, da ba matakin na girma da iko, tare da m makamashi masha'a da kuma murdiya. Yin amfani da wannan amplifiers ya fara a shekarar 1958, amma a 'yan shekarun da shahararsa ya karu markedly. Mene ne haka mai kyau amfilifa D-aji? A wannan labarin, za mu yi kokarin amsa wannan tambaya.

A wani al'ada fitarwa mataki aga na'urar gina a kan semiconductor abubuwa transistors. Suna bayar da so fitarwa yanzu darajar. Mutane da yawa daga cikin audio amfilifa, saukarwa mai Class A, B da kuma AB. Lokacin da aka kwatanta da fitarwa mataki aiwatar a cikin aji D, da ikon masha'a a mikakke manzilõli gagarumin ko a manufa taro. Wannan factor samar da wani aji D gagarumin amfani a mafi aikace-aikace saboda da kananan zafi masha'a, kananan girma, low samfurin kudin da kuma ƙara da tsawon aiki na na'urorin.

Audio Amplifiers Class D suna da ikon masha'a ne da yawa m fiye da amplifiers A, B da kuma AB azuzuwan. Kunamu a wani fitarwa mataki na amfilifa fitarwa an haɗa, korau kuma m ikon bas, ta haka ne samar da wani jerin hatsaisai da kyau da kuma wani mummunan m. D-aji amfilifa saboda da siffar da irin wannan alama ma rage ikon masha'a, saboda kasancewar halin yanzu ta hanyar da fitarwa transistors, da m bambancin ma ba ya wuce (da transistor ne a cikin rufaffiyar jihar). Idan transistor a waje yanayin da na yanzu ya wuce ta da shi, wani kadan ƙarfin lantarki saukad da kanta. A instantaneous ikon dissipated a wannan harka shi ne kadan.

Ko da yake ikon amfilifa ne a aji D lullube dukkanin wani karamin adadin thermal makamashi kamar yadda idan aka kwatanta da mikakke amplifiers, akwai har yanzu a hatsarin zafi fiye da kima kewaye. Wannan na iya faruwa a lokacin da na'urar aiki na dogon lokaci a cikin cikakken ikon yanayin. Don hana wannan tsari, shi ne zama dole a D-aji amfilifa taimaka yawan zafin jiki kula kewaye. A na farko m haihuwarka a cikin fitarwa mataki an akshe a lokacin da yawan zafin jiki auna da Hadakar haska wuce zazzabi bakin kofa ba to kunna har da zazzabi saukad da zuwa al'ada. Hakika, yana yiwuwa a yi amfani da karin hadaddun haihuwarka ga zazzabi iko. Alal misali, da aunawa da yawan zafin jiki, da iko kewaye iya hankali rage ƙarar, kuma ta haka ne rage zafin rana, sakamakon yanayin zafi za a kiyaye a cikin bukata iyaka. A amfani da irin makircinsu ne cewa na'urar da za ta ci gaba da aiki da kuma ba za a katse.

D-aji amplifiers da drawback - a lokacin da ya juya da na'urar bayyana a shi yana kaɗawa da baba, wanda zai iya hangula da masu amfani. Wannan sakamako zai iya faruwa idan "tsufa" ko matalauta shigarwa na modulator, da kuma wani aiki tare fitarwa mataki LC-tace yanayin a lokacin ya sauya sheka a kuma kashe da na'urar.