Cov txheej txheem dab tsi yog siv los xaiv qhov hloov pauv hluav taws xob ua haujlwm zaus?
Yuav ua li cas yog lub hauv paus rau kev xaiv ntawm kev khiav hauj lwm zaus ntawm lub switching fais fab mov? Yam dab tsi yuav tsum tau xav txog thaum xaiv nws? Puas yog cov teeb meem no dhau los ua koj lub hom phiaj thaum tsim lub voj voog? Cia kuv qhia qee yam rau xaiv qhov kev ua haujlwm zaus.
Raws li tus kws tshaj lij hluav taws xob, koj puas tau ntsib "qhov nyuaj hauv kev xaiv" thaum xaiv cov khoom siv? Cia kuv kuaj qhov ua rau koj. Ib qho yog tias kuv tsis meej txaus txog kuv qhov kev xav tau tiag tiag, thiab lwm qhov yog tias qee qhov kev ua tau zoo tsis nkag siab zoo thiab tsis muaj kev taw qhia kev tshaj lij ntxiv. Thaum fais fab mov engineers xaiv lub ntsiab tswj IC, vim hais tias muaj ntau manufacturers thiab ntau yam parameter xaiv, nws yog ib qhov nyuaj rau xaiv ib tug fais fab mov IC haum rau lawv tus kheej siv.
Thaum xaiv qhov hloov zaus ntawm AC lub zog hloov pauv hloov pauv, tsis muaj tus kws tshaj lij hais tias xaiv qhov zoo tshaj plaws hloov zaus, tab sis xaiv qhov tsim nyog tshaj plaws rau koj tus kheej siv. Feem ntau AC-DC hloov khoom siv hluav taws xob hauv khw tam sim no siv qhov hloov pauv zaus ntawm 50K thiab 135K, uas tuaj yeem ua tau raws li qhov xav tau ntawm cov ntawv thov feem ntau. Cia peb tham txog qee qhov teeb meem uas tau ntsib thaum xaiv qhov hloov zaus ntawm AC-DC fais fab mov:
Vim li cas ho tsis koj feem ntau xaiv qhov hloov zaus qis dua 50K?
Peb paub tias qhov qis dua qhov hloov zaus yog, qhov me me qhov hloov pauv yuav yog. Ntawm qhov tod tes, qhov loj ntawm cov cuab yeej hluav taws xob yuav nce ntxiv nrog qhov txo qis ntawm qhov hloov pauv, uas tsis yog qhov tsim nyog rau miniaturization. Thaum lub zog hloov hluav taws xob ua haujlwm, cov tub ntxhais hlau nplaum yuav co vim qhov hloov ntawm cov khoom siv hloov pauv. Nyob rau tib lub sijhawm, qhov ntau zaus uas tuaj yeem hnov hauv pob ntseg yog li 20 ~ 20000Hz. Txhawm rau kom tsis txhob muaj lub suab nrov uas tuaj yeem hnov ntau li ntau tau, peb feem ntau xaiv qhov zaus ntawm 20KHz. .
Dab tsi yog qhov tsis zoo ntawm kev xaiv AC-DC tswj IC nrog qhov hloov pauv zaus siab dua 135K?
Thaum kuaj cov electromagnetic cuam tshuam emission ntawm cov khoom siv hluav taws xob thiab hluav taws xob, qhov emission ntawm qhov cuam tshuam cuam tshuam ntawm lub zog hluav taws xob yuav tsum tau sim. Txawm hais tias cov zaus bands kuaj los ntawm cov qauv sib txawv yog txawv, feem ntau ntawm cov khoom kuaj zaus bands yog 150K ~ 30M. Nws tuaj yeem pom los ntawm qhov txwv qis ntawm qhov ntsuas zaus uas ze dua qhov kev ua haujlwm zaus ntawm kev hloov hluav taws xob hloov mus rau 150K, qhov nyuaj dua nws yog los daws qhov kev cuam tshuam ua haujlwm.
Lub sijhawm thov tshwj xeeb dab tsi uas yuav tsum muaj rau kev hloov pauv ntawm lub zog hluav taws xob?
Hauv qee lub sijhawm tshwj xeeb, kev ua haujlwm hauv Circuit Court yog rhiab heev rau lub suab nrov ntawm lub zog hloov. Xws li lub tshuab fais fab, kev sib txuas lus wireless, kev txheeb xyuas wireless thiab lwm lub sijhawm. Wb tham txog qhov yuav tsum tau ua rau daim ntawv thov hloov hluav taws xob.
Tam sim no, lub hwj chim nqa tau tsuas yog siv nyob rau hauv cov tsev ntse, cov khoom siv telemetry, thiab cov chaw taws teeb tswj kev teeb pom kev zoo. Nyob rau tib lub sijhawm, daim ntawv thov ntau ntawm cov khoom siv hluav taws xob ntau zaus hauv kuv lub teb chaws yog 9KHz txog 500KHz, thiab cov neeg nqa khoom zaus bandwidth yog 4KHz. Vim tias qhov kev hloov pauv ntawm impedance ntawm cov kab hluav taws xob thiab lub suab nrov cuam tshuam ntawm cov kab hluav taws xob, kev txhim kho ntawm cov khoom siv hluav taws xob tau txwv ntau heev. Txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm Tam sim no, cov cab kuj siv nyob rau hauv Suav teb yog 115KHz thiab 132KHz. Nyob rau hauv rooj plaub no, nws yog ib qho tsim nyog yuav tau siv lub hwj huam mov nrog qhov hloov zaus ntawm 60KHz.
