D kalasi mkuzamawu - zimene kutchuka kwake?

Audio kalasi D-mkuzamawu - chipangizo cha kubereka chizindikiro ntchito chipangizo athandizira, pogwiritsa ntchito zinthu za dera athandizira ndi anakonzeratu voliyumu ndi mphamvu mlingo ndi osachepera mphamvu madyaidya ndikuledzera ndi kupotoza. Ntchito amplifiers ngati wayamba mu 1958, koma zaposachedwapa kutchuka kwawo kunakulanso. bwino mkuzamawu D-kalasi ndi chiyani? M'nkhaniyi tiona yesani kuyankha funso ili.

Mu ochiritsira siteji linanena bungwe chipangizo amplifying anamanga pa michenga yopangira zida zamagetsi zinthu transistors. Iwo kupereka anakhumba linanena bungwe mtengo panopa. Ambiri mwa magawo zomvetsera mkuzamawu ndi Maphunziro A, B ndi AB. Poyerekeza ndi gawo linanena bungwe akuyendera kalasi D, mphamvu madyaidya ndikuledzera mu liniya magawo kwambiri ngakhale pa msonkhano abwino. Chinthu ichi chikupatsani kalasi D kwambiri mwayi mafomu kwambiri chifukwa ang'ono kutentha madyaidya ndikuledzera, mbali yaing'ono, mtengo wotsika mankhwala kuwonjezera nthawi ya ntchito zipangizo.

Audio Amplifiers Maphunziro D ndi mphamvu madyaidya ndikuledzera kwambiri m'munsi kuposa amplifiers A, B ndi AB makalasi. Makiyi mu gawo linanena bungwe la mkuzamawu linanena bungwe chikugwirizana, zoipa ndi zabwino mphamvu basi, motero kupanga mndandanda wa nyemba ndi HIV ndi chiwopsezo negative. D kalasi mkuzamawu chifukwa cha mawonekedwe a zoterozo mbendera zayamba amachepetsa mphamvu madyaidya ndikuledzera, chifukwa kukhalapo panopa mwa transistors linanena bungwe, kusiyana angathe zayamba sikuti kudali (a transistor ndi boma chatsekedwa). Ngati transistor mu mode ndi panja ndipo panopa umadutsa izo, voteji pang'ono akutsikira pomwepo. Mphamvu yomweyo ankakhala moyo wotayirira mu nkhani iyi ndi kochepa.

Ngakhale mkuzamawu mphamvu kalasi D dissipates pang'ono mphamvu matenthedwe poyerekeza ndi amplifiers liniya, pali ngozi kutenthedwa dera. Izi zingachitike pamene chipangizo umagwira ntchito kwa nthawi yaitali mu zonse mode mphamvu. Pofuna kupewa ndondomeko imeneyi, m'pofunika mu mkuzamawu D-kalasi athe kulamulira kutentha dera. The pulayimale madera woteteza siteji linanena bungwe ndi wazimitsa pamene kutentha kuyeza ndi kachipangizo Integrated kuposa munthu pakhomo kutentha kuyang'ana pa mpaka kutentha akutsikira mwakale. Kumene, n'zotheka ntchito madera ovuta kwambiri kulamulira kutentha. Mwachitsanzo, kuyeza kutentha, ulamuliro dera pang'ono ndi pang'ono kuchepa buku, motero kuchepa kutentha, chifukwa mu kutentha adzakhala anakhalabe malire chofunika. The ntchito njira zimenezi ndi chipangizo adzapitiriza ntchito ndipo sati sakukhudzidwa.

amplifiers D-kalasi ndi drawback - pamene kutembenukira chipangizo kuoneka mu izo kudina ndi pops, amene akhoza kuwapweteka amazigwiritsa ntchito. Amenewa angayambe ngati "ukalamba" kapena unsembe osauka modulator, ndipo synchronizing linanena bungwe siteji LC-fyuluta chikhalidwe pa kusintha osinthasintha chipangizo.