Haɗin kai da ƙa'idar aiki na electret condenser makirufo

Talata 21 Disamba 21:38:37 CST 2021

Makirifo na lantarki ya ƙunshi jujjuyawar wutar lantarki mai sauti da jujjuyawar matsananciyar ƙarfi.Maɓalli na jujjuyawar acoustoelectric shine diaphragm electret.Fim ɗin filastik ne mai sirara sosai, wanda a cikinsa ake zubar da fim ɗin zinariya tsantsa a gefe ɗaya.Bayan haka, bayan wutar lantarki na filin lantarki mai ƙarfi, akwai cajin anisotropic a bangarorin biyu.Wurin zinare da aka ƙafe na diaphragm yana waje kuma yana haɗe da harsashi na ƙarfe.An raba ɗayan gefen diaphragm daga farantin karfe ta hanyar zoben rufi na bakin ciki.Ta wannan hanyar, ana samun capacitance tsakanin fim ɗin zinariya da aka ƙafe da farantin karfe.Lokacin da electret diaphragm ya ci karo da rawar murya, filin lantarki a ƙarshen capacitor biyu yana canzawa, yana haifar da canjin wutar lantarki mai bambanta tare da canjin sautin murya.Ƙarfin da ke tsakanin diaphragm na electret da farantin karfe yana da ɗan ƙaramin ƙarfi, gabaɗaya dubun PF.Saboda haka, ƙimar abin da yake fitarwa yana da girma sosai (XC = 1/2 ~ TFC), kusan dubun megaohms ko fiye.Ba za a iya daidaita irin wannan babban matsa lamba kai tsaye tare da ƙarawa mai jiwuwa ba.Saboda haka, an haɗa transistor tasirin filin junction cikin makirufo don jujjuyawar matsawa.FET tana da girman girman shigar da ƙara da ƙaramin amo.FET gama gari tana da na'urorin lantarki guda uku: lantarki mai aiki (s), grid electrode (g) da kuma magudanar ruwa (d).Anan, ana amfani da FET na musamman tare da wani diode tsakanin tushen ciki da grid.Manufar diode shine don kare FET daga tasirin sigina mai karfi.Ƙofar FET ta haɗa da farantin karfe.Ta wannan hanyar, akwai layukan fitarwa guda uku na microphone electret.Wato tushen s gabaɗaya wayar filastik shuɗi ne, magudanar ruwa D gabaɗaya jajayen filastik waya ce da kuma wariyar garkuwa da aka ɗaure da ke haɗa harsashin ƙarfe.