D-class amplifier - lokho ukuthandwa kwakhe?

Audio ekilasini D-amplifier - kudivayisi ekukhiqizweni isignali isetshenziswa kwidivaysi yokufakwayo, besebenzisa izakhi ze-wesifunda okokufaka nge predetermined ivolumu namandla ezingeni ne ubuncane amandla ukushabalalisa futhi ukuhlanekezela. Ukusetshenziswa yokukhulisa umsindo ezifana uqalile ngo-1958, kodwa eminyakeni yamuva udumo lwawo liye landa ngokuphawulekayo. Kuyini ngakho okuhle amplifier D-class? Kulesi sihloko uma silinga ukuphendula lombuzo.

Ngo esiku okukhipha esiteji kudivayisi yokukhulisa izwi eyakhelwe izakhi Semiconductor transistors. Zinikeza oyifunayo okukhipha Inani lamanje. Abaningi umsindo amplifier izigaba abe Class A, B no-AB. Uma iqhathaniswa nezinhloko-esigabeni okukhipha ukusebenza kule D ekilasini, le ukushabalalisa amandla komugqa izigaba okubaluleke ngisho emhlanganweni enhle. Lokhu isici inikeza isigaba D inzuzo enkulu izicelo kakhulu ngenxa ukushabalalisa ukushisa encane, Ubukhulu encane, ongaphakeme umkhiqizo izindleko kanye ukwandisa isikhathi wokusebenza amadivaysi.

Audio yokukhulisa umsindo Class D abe ukushabalalisa amandla lingaphansi kakhulu kunaleyo yokukhulisa umsindo A, B no-AB amakilasi. Keys i esiteji ekhishwa okukhipha amplifier ixhunyiwe, amandla omubi futhi omuhle ibhasi, ngaleyo ndlela kudale uchungechunge pulses nge esiqondile engemihle. D-class amplifier ngenxa ukuma isiginali ezifana kakhulu kunciphisa ukushabalalisa amandla, ngoba ukuba khona wamanje ngokusebenzisa transistors okukhipha, umehluko ezingaba kakhulu aluphumeleli (the Transistor isebujameni evaliwe). Uma Transistor ikumodi ongaphandle kanye wamanje sidlula ke, zinamandla okuncane lehla kwalo. Amandla leso kwashabalala kulokhu incane.

Nakuba amplifier Amandla D ekilasini dissipates esincane energy ezishisayo uma iqhathaniswa yokukhulisa umsindo yomugqa, kusekhona ingozi okweqile wesifunda. Lokhu kungenzeka uma idivayisi esebenza isikhathi eside ngamandla imodi egcwele. Ukuvimbela lokhu inqubo, kubalulekile e amplifier D-class unike amandla ukulawula lokushisa wesifunda. I aphansi izifunda okuvikela esigabeni okukhipha sivaliwe uma izinga lokushisa kukalwa inzwa okuhlangene idlula kombundu lokushisa hhayi ukuze uvule kuze izinga lokushisa lehla kokuvamile. Yiqiniso, kungenzeka ukusebenzisa izifunda ezengeziwe eziyinkimbinkimbi ukulawula lokushisa. Ngokwesibonelo, ukulinganisa izinga lokushisa, isifunda control kungenzeka kancane kancane unciphise ivolumu, futhi ngaleyo ndlela wehlise ukushisa, okuholela okushisa zizogcinwa phakathi komkhawulo edingekayo. Buhle amaqhinga anjalo ukuthi idivayisi izoqhubeka isebenze futhi ngeke inqanyuliwe.

D-class yokukhulisa umsindo ube ethile - uma turning idivayisi avele ke ukuchofozwa futhi sivele, okuyinto ungase ucasuke abasebenzisi. Lo mphumela singenzeka uma "ukuguga" noma ukufakwa abampofu modulator, kanye ukuvumelanisa okukhipha esiteji LC Elihehayo isimo ngesikhathi ukushintsha ngaphakathi nangaphandle kwe-zedivayisi.