Yog vim li cas thiab kev tsom xam ntawm DC fais fab mov xav tau kev lim dej
Qhov zoo tshaj plaws ruaj khov voltage fais fab mov yam tsis muaj lim ntawm qhov hluav taws xob. Nws yog qhov tseeb tias lim capacitors txo AC impedance ntawm lub hwj chim mov. Qhov laj thawj yog tias muaj ib txwm muaj kev tawm tsam sab hauv. Ntawm qhov kawg ntawm cov khoom siv hluav taws xob, lub capacitor yog ntxiv, kom qhov tam sim no nce tam sim no thiab tswj lub capacitor hauv lub sijhawm luv, thiab tam sim no txo qis tam sim no thiab tswj lub capacitor uas tuaj yeem thim rov qab hauv lub sijhawm luv luv. Ib feem tseem ceeb ntawm cov kev hloov pauv tam sim no tau hloov ncaj qha hla lub capacitors es tsis yog los ntawm kev tiv thaiv sab hauv ntawm lub zog hluav taws xob, yog li txo qis AC impedance ntawm lub zog hluav taws xob.
Muaj ib daim ntawv thov zoo sib xws hauv Circuit Board IC fais fab mov decoupling capacitor, uas kuj ua lub luag haujlwm no, vim hais tias cov khoom siv hluav taws xob sab hauv, qhov impedance ntawm cov kab sib txuas, thiab cov decoupling capacitor tuaj yeem hloov pauv qee qhov tam sim ntawd thiab ncaj qha rau hauv lub capacitor tam sim no. pauv, txo qhov kev hloov pauv tam sim no ntawm kab. Ntawm qhov tod tes, muaj Nws muaj txiaj ntsig zoo rau kev siv hluav taws xob sib xyaw ua ke, thiab ntawm qhov tod tes, nws tseem tuaj yeem pab txo qhov cuam tshuam rau lwm cov kev sib xyaw ua ke.
Los ntawm qhov kev pom no, siv lub zog zoo tshaj plaws, lub decoupling capacitor tsis tuaj yeem raug tshem tawm vim qhov tsis zoo ntawm cov xaim.
Tsis tas yuav xav txog qhov xwm txheej ntawm DC. Qhov tseeb, tag nrho cov khoom siv hluav taws xob muaj peev xwm tsav tsheb. Raws li qhov ua tau zoo ntawm kev txaus siab rau kev tsav tsheb, lub zog tso zis tuaj yeem nyob ruaj khov. Qhov yuav tsum tau muaj peev xwm tsav tsheb kuj yog qhov yuav tsum tau muaj kev tiv thaiv sab hauv rau qee qhov, tab sis nws yog qhov sib txawv, qhov kev tiv thaiv sab hauv yuav tsum tsim kom muaj kev poob siab, thiab lub zog ruaj khov, vim yog kev siv lub voj kaw kaw, nyob rau hauv ntau yam. muaj peev xwm tsav tsheb, nws muaj peev xwm theoretically yuav lav tau qhov tso zis tas li.
Qhov thiaj li hu ua capacitive txo qis ntawm AC impedance feem ntau yog tsom rau qhov siab-frequency AC impedance, vim hais tias txawm tias lub hwj huam mov yog kaw-voj, muaj cov kev xav tau rau cov lus teb ceev. Vim lub sijhawm hloov pauv ntawm lub sijhawm tam sim no, nws cov lus teb tsis tuaj yeem khaws cia, ua rau muaj kev hloov pauv me ntsis hauv qhov hluav taws xob. Los ntawm kev ntxiv capacitance, qhov hloov pauv tam sim no hauv cov khoom siv hluav taws xob tam sim no tuaj yeem txo qis, yog li hloov cov yam ntxwv ntawm lub zog hluav taws xob.
Rau cov lim fais fab, kuv nyuam qhuav tham txog cov txiaj ntsig ntawm kev txo AC impedance. Qhov tseeb, txo cov zis ripple yog qhov tseem ceeb dua. Rau cov hlwb qhuav, cov zis tsis muaj ripple thiab yuav tsum tsis txhob lim.
Txawm li cas los xij, kev nce hauv capacitance, tshwj xeeb tshaj yog nyob ze ntawm IC lub hwj chim pins, yog qhov tsim nyog rau cov circuits nyuaj los ntawm kev pom ntawm AC impedance txo tau hais ua ntej.
