Vim li cas cov neeg hais lus tsis tuaj yeem tsim suab ncaj qha thiab xav tau lub Rooj Tswjhwm Saib Xyuas Amplifier?
Cov neeg hais lus tseem ceeb xav tau lub rooj tsavxwm amplifier (lossis amplifier) los tsim cov suab lus nyob hauvmismatch ntawm "tsis muaj zog hluav taws xob teeb liab" tso tawm los ntawm lub suab thiab "lub zog muaj zog" yuav tsum tau tsav cov neeg hais lus-cov neeg hais lus lawv tus kheej tsis muaj peev xwm hloov cov cim hluav taws xob me me rau hauv lub suab nrov. Hauv qab no yog cov ncauj lus kom ntxaws txog lub hauv paus ntsiab lus thiab qhov tsim nyog:
1. Ua ntej, nkag siab qhov tseem ceeb "Signal Energy Gap"
Cov teeb liab tso tawm los ntawm cov khoom siv suab (xws li smartphones, TVs, turntables, thiab computers) yog tag nrho.low-voltage, low- tam sim no tsis muaj zog teeb liab(feem ntau tsuas yog ob peb millivolts rau kaum millivolts, nrog rau tam sim no hauv microamp ntau). Thaum cov teeb liab no muaj "suab cov ntaub ntawv" (xws li suab, suab), lawv yuav luag tsis muajtsav zogyuav tsum muaj zog hais lus.
Hauv qhov sib piv, cov ntsiab lus tseem ceeb ntawm tus hais lus -tustus tsav tsheb(muaj cov hlau nplaum, lub suab coil, thiab diaphragm)- tso siab rauelectromagnetic quab yuam los thawb lub diaphragm thiab vibrate cua(suab, raws li peb perceive nws, yog qhov tseem ceeb ntawm huab cua vibration). Txhawm rau txav lub diaphragm (tshwj xeeb tshaj yog nruab nrab -bass units lossis loj- txoj kab uas hla)) thiab tsim kev vibrations hnov rau tib neeg pob ntseg, lub suab coil yuav tsum muajtxaus muaj zog alternating tam sim no(feem ntau nyob rau hauv lub ampere ntau) los cuam tshuam nrog cov hlau nplaum thiab tsim kom txaus thrust.
Lub teeb liab tsis muaj zog los ntawm lub suab nrov dhau "feem ntau" los tsav lub suab coil -tsis muaj kev nthuav dav, nws tsuas tuaj yeem tsim kev vibrations inaudibly faint (lossis tsis muaj dab tsi). Lub luag haujlwm tseem ceeb ntawm lub rooj tsavxwm amplifier yog uatxuas qhov "lub zog sib txawv".
2. Ob qhov tseem ceeb ntawm lub Amplifier Board: "Amplification + Matching"
Lub rooj tsavxwm amplifier tsis yog "ua kom nrov nrov"; nws kuj daws tau ob qhov teeb meem tseem ceeb uas cov neeg hais lus tsis tuaj yeem hais txog lawv tus kheej:
(1) Fais fab Amplification: Hloov cov teeb liab tsis muaj zog rau "Drivable Energy"
Lub ntsiab Circuit Court ntawm lub amplifier board (feem ntau suav nrog ua ntej -amplifier thiab lub zog amplifier theem) uadual amplification ntawm qhov voltage thiab tam sim nontawm lub suab tsis muaj zog:
Ua ntej- amplifier theem: Ua ntej, nws "refines" cov teeb liab tsis muaj zog (txo cov suab nrov, kho cov suab nrov) thiab ua kom nws qhov hluav taws xob mus rau "qib siv tau ua ntej" (xws li, los ntawm millivolts mus rau ob peb volts);
Lub zog amplifier theem(qhov tseem ceeb ntawm lub rooj tsavxwm amplifier): Nws txuas ntxiv qhov tam sim no mus rau theem uas tus neeg hais lus xav tau (piv txwv li, los ntawm microamps mus rau 1-10 amperes) thaum ceev ceev cov ntaub ntawv suab nrov (kom tsis txhob muaj kev cuam tshuam).
Tsuas yog tom qab ob qhov "voltage + tam sim no" amplification puas lub teeb liab muaj lub zog txaus los tsav tus neeg hais lus lub suab coil, ua rau lub diaphragm vibrate thiab thaum kawg ua kom meej, hnov suab.
(2) Impedance Matching: Tsis txhob siv hluav taws xob pov tseg thiab khoom siv puas tsuaj
Cov neeg hais lus muaj qhov ruaj khovimpedance(piv txwv li, 4Ω, 8Ω, uas tuaj yeem nkag siab tias "tsis kam" rau tam sim no), thaum lub suab (xws li lub xov tooj smartphone lub mloog pob ntseg) feem ntau muaj cov zis impedance siab heev (ntau pua ntawm ohms)-ib qho tsis sib haum nrog tus hais lus qis impedance.
Yog tias koj txuas tus hais lus ncaj qha mus rau lub suab (tsis muaj lub suab nrov), qhov noimpedance tsis sib haumua rau ob qho teeb meem loj:
Feem ntau ntawm lub zog tsis muaj zog tso tawm los ntawm lub suab yog "nkim" (tsis ua haujlwm zoo rau tus neeg hais lus), ua rau yuav luag tsis muaj suab;
Lub suab tso zis hluav taws xob tuaj yeem raug puas vim "overload" (sim muab tam sim no rau lub suab qis -impedance hais lus, zoo ib yam li "tus nees me rub lub laub loj")-piv txwv li, hlawv tawm lub xov tooj ntawm lub suab nti.
Lub rooj tsavxwm amplifier ua raws li "impedance adapter": nws cov input impedance phim lub suab (kom paub meej lub teeb liab tau txais txiaj ntsig), thiab nws cov zis impedance phim tus neeg hais lus (kom ntseeg tau tias lub zog amplified tau kis tau zoo mus rau tus neeg hais lus). Qhov no tsis tsuas yog txo cov khoom siv hluav taws xob xwb tab sis kuj tseem tiv thaiv ob qho tib si lub suab thiab tus hais lus los ntawm kev puas tsuaj.
3. Ib qho yooj yim Analogy: Cov neeg hais lus yog "Engines," Amplifiers yog "Fuel Injectors"
Xav txog qhov no:
Lub suab (piv txwv li, lub xov tooj smartphone) zoo li "tus neeg tsav tsheb lub hlwb" - nws tsuas yog xa "cov lus qhia" (cov ntaub ntawv suab) tab sis tsis muaj "roj" (zog) los tsav "lub cav";
Tus neeg hais lus yog "lub cav tsheb"- nws xav tau "roj" (zog) ua haujlwm (tsim suab) tab sis tsis tuaj yeem "tsim roj" ntawm nws tus kheej;
Lub rooj tsavxwm amplifier yog "fuel injector"- nws hloov "lub hlwb cov lus qhia" mus rau "foob txaus" (amplified teeb liab lub zog) thiab txuas ntxiv xa mus rau "lub cav," cia lub cav ua haujlwm ib txwm.
Yog tsis muaj lub rooj tsavxwm amplifier, tus hais lus zoo li "lub cav tsis muaj roj"-txawm tias nws zoo li cas, nws tsis tuaj yeem ua haujlwm.