Umngxuma wesandi osezantsi we-ADI we-MEMS imakrofoni inokuthengiswa ngokuthe ngqo kwi-PCB ngokuthengiswa kwakhona.Umngxuma kufuneka wenziwe kwi-PCB ukudlulisa isandi kwiphakheji ye-microphone.Ukongeza, izindlu ezihlala iPCB kunye nemakrofoni zinendawo yokuvula ukuvumela imakrofoni ukuba inxibelelane nokusingqongileyo kwangaphandle
Kwimeko eqhelekileyo, imakrofoni ibonakaliswe kwindawo yangaphandle.Kwiindawo zangaphandle ezinzima, amanzi okanye olunye ulwelo lunokungena kwi-microphone cavity kwaye luchaphazele ukusebenza kwemakrofoni kunye nomgangatho wesandi.Ukungena kolwelo nako kunokonakalisa ngokusisigxina imakrofoni.Eli nqaku lesicelo lichaza indlela yokukhusela imakrofoni ukuba ingonakaliswe yile nto, iyenze ilungele ukusetyenziswa kwiindawo ezimanzi kunye ezinothuli, kuquka ukucwiliswa ngokupheleleyo.
inkcazo yoyilo
Ukubonelela ngokhuseleko kulula, faka nje iqhekeza lerabha elithambileyo okanye into efana nesitywina phambi kwe-microphone.Xa kuthelekiswa ne-acoustic impedance ye-microphone port, eli tywina kuyilo linciphisa kakhulu i-acoustic impedance.Xa iyilwe ngokufanelekileyo, itywina alichaphazeli ubuntununtunu bemakrofoni, ichaphazela kancinane kuphela impendulo yefrikhwensi, ilinganiselwe kuluhlu lwetreble.Imakrofoni yezibuko esezantsi ihlala ixhonywe kwiPCB.Kolu luyilo, icala langaphandle lePCB ligqunywe ngomaleko wezinto eziguquguqukayo ezingangeni manzi njengerabha ye-silicone.Olu luhlu lwezinto eziguquguqukayo lunokusetyenziswa njengenxalenye yebhodibhodi okanye ikhiphedi yamanani, okanye inokudityaniswa kuyilo lwamashishini.Njengoko kubonisiwe kuMfanekiso 1, lo maleko wezinto eziphathekayo kufuneka udale umgodi phambi komngxuma wesandi kwi-PCB, uphucula ukuthotyelwa komatshini okuhambelana nefilimu.Ifilimu eguquguqukayo yenza ukukhusela i-microphone kwaye kufuneka ibe yincinci ngokusemandleni.
Ukuqina kwefilimu kunyuka ngobunzima betyhubhu, ngoko ke ukukhetha eyona nto incinci inokwenzeka kwisicelo kunciphisa isiphumo sokuphendula rhoqo.Inkulu (enxulumene nezibuko lemakrofoni kunye nomngxuma kwi-PCB) umngxuma ophakathi kunye nefilimu ethambileyo ebhetyebhetye kunye yenze i-impedance acoustic loop ephantsi.Le impedance ephantsi (ngokunxulumene ne-microphone input impedance) inciphisa ilahleko yesignali.Idayamitha yomgodi kufuneka ibe malunga ne-2× ukuya kwi-4× leyo yezibuko lesandi, kwaye umphakamo womgodi kufuneka ube phakathi kwe-0.5 mm kunye ne-1.0 mm.
Ixesha lokuposa: Sep-07-2022
