D-kirasi gudzazwi - chii kukurumbira ake?

Audio Kirasi D-gudzazwi - zano kuti kubereka mureza rinoshandisirwa mazano mudziyo, vachishandisa zvinhu mazano redunhu akafanorongerwa vhoriyamu uye simba pamwero pamwe shoma simba nounzenza uye kusarurama. Kushandiswa amplifiers kwakadaro kwakatanga muna 1958, asi mumakore achangopfuura mukukurumbira yavo kwakawedzera zvikuru. Chii gudzazwi kunyatsonaka D-kirasi? Munyaya ino tinoedza kupindura mubvunzo uyu.

Mune kwakajairika goho padanho amplifying mudziyo yakavakwa semiconductor zvinhu transistors. Anopa achida goho kuitika ukoshi. Vakawanda okuteerera gudzazwi mumatanho vane Zvinokonzerwa A, B uye AB. Kana zvichienzaniswa goho rwakazara rakatangwa muna mukirasi D, simba bongozozo iri Linear mumatanho chinokosha kunyange panguva yakanaka gungano. chinhu ichi inopa kirasi D rinokosha zvinobatsira mafomu dzakawanda nokuda duku kupisa nounzenza, kukura diki, pasi chigadzirwa mutengo uye kuwedzera nguva mudzimu Namano.

Audio Amplifiers Kirasi D vane simba nounzenza dererei zvikuru kupfuura amplifiers A, B uye AB makirasi. Mazano ari goho pavaipfuura gudzazwi goho zvakabatana, kunaka uye zvakanaka simba bhazi, nokudaro zvichiita nhevedzano pulses uine uye zvakaipa zvinogona. D-kirasi gudzazwi nokuda chimiro chiratidzo yakadaro substantially kunoderedza simba nounzenza, nokuti kuvapo kuitika kuburikidza goho transistors, vanokwanisa musiyano substantially asingadi kupfuura (the transistor ari namahwindo state). Kana transistor ari panze rudzi uye magetsi ichipfuura payo, zvishomanana voltage anodonhedza payo. The nguva imwe simba akaparadza hazvisi zvishoma.

Kunyange zvazvo simba gudzazwi riri boka D dissipates shoma chafariz simba achienzaniswa Linear amplifiers, pachine ngozi overheating redunhu. Izvi zvinogona kuitika kana mudziyo unoshanda kwenguva refu mubasa renguva simba muoti. Kuti izvi zvisaitika muitiro, zvakakodzera mune D-kirasi gudzazwi dzinoita tembiricha kudzora redunhu. Zvepakutanga nematunhu runodzivirira ari goho chikuva adzima apo tembiricha akayera parutivi Integrated Switch kwazvo ane tembiricha chikumbaridzo arege kutsausa pasi kusvikira tembiricha anodonhedza kune dzose. Zvechokwadi, zvinokwanisika kushandisa nematunhu zvikuru kunzwisisa kuti tembiricha kudzora. Somuenzaniso, kuyera tembiricha, kudzorwa redunhu anogona zvishoma nezvishoma kuchiderera vhoriyamu, uye nokudaro kuderera kupisa, zvichiguma tembiricha nekuchengetedzwa mukati runodiwa mitemo. Kunakisa zvirongwa zvakadaro ndechokuti mudziyo ucharamba uchishanda uye haangawedzerwi akochonorwa.

D-kirasi amplifiers vane drawback - apo akashandura mudziyo kuoneka mariri the clicks uye zvabuda, vangatongera kutsvinyira vanozvishandisa. Izvi zvinogona kuitika kana "kukwegura" kana murombo kugadzwa modulator, uye synchronizing goho padanho LC-Sefa munguva nokuchinja pamusoro uye kure ari mudziyo.