Qhov sib txawv tseem ceeb ntawm kev hloov hluav taws xob thiab cov khoom siv hluav taws xob linear
1. Kev hloov hluav taws xob hloov hluav taws xob hloov hluav taws xob ncaj qha mus rau hauv high-frequency mem tes tam sim no, khaws cov hluav taws xob hluav taws xob hauv inductance thiab capacitance Cheebtsam, thiab siv cov yam ntxwv ntawm inductance thiab capacitance tso tawm hluav taws xob hluav taws xob raws li qhov xav tau los hloov cov zis hluav taws xob lossis tam sim no; linear fais fab mov tsis muaj lub siab zaus Pulse thiab cov khoom siv cia, uas siv cov yam ntxwv ntawm cov khoom siv rau kev tawm tswv yim tam sim thiab tswj cov tswv yim kom ua tiav qhov ruaj khov voltage thiab tam sim no thaum hloov pauv.
2. Lub zog hloov hluav taws xob tuaj yeem nqis los lossis txhawb nqa qhov hluav taws xob; linear fais fab mov tuaj yeem nqis los xwb.
3. Lub zog hloov hluav taws xob muaj kev ua haujlwm siab; linear fais fab mov muaj tsawg efficiency.
4. Kev tswj ceev ntawm cov khoom siv hluav taws xob linear yog ceev thiab cov ripple me me; lub ripple ntawm switching zog mov yog loj.
Lub hauv paus ntsiab lus ua haujlwm tseem ceeb ntawm kev hloov hluav taws xob yog tias MOS cov hlab ntawm tus choj sab saud thiab tus choj qis tau tig rau hauv lem. Ua ntej, tam sim no ntws los ntawm tus choj sab sauv MOS raj, thiab kev ua haujlwm ntawm lub kauj yog siv los khaws cov hluav taws xob hauv lub kauj. Thaum kawg, tus choj sab sauv MOS lub raj raug muab tua, thiab tus choj qis dua tau qhib. MOS raj, coil thiab capacitor ntawm tus choj txuas ntxiv muab lub zog rau sab nraud. Tom qab ntawd tua tus choj qis MOS raj, thiab tom qab ntawd tig rau ntawm tus choj sab saud kom cia cov tam sim no nkag mus, thiab rov ua qhov no, vim tias MOS cov raj yuav tsum tau hloov mus rau thiab tawm hauv lem, yog li nws yog hu ua switching power supply.
Cov khoom siv hluav taws xob linear txawv. Lub linear regulated fais fab mov (LDO) hloov thiab tswj nws cov zis voltage thiab tam sim no los ntawm kev hloov cov conduction degree ntawm lub transistor. Nyob rau hauv linear regulated fais fab mov (LDO), lub transistor yog sib npaug rau ib tug sib txawv resistor. , txuas nyob rau hauv series nyob rau hauv lub hwj chim mov Circuit Court. Txij li thaum tsis muaj kev hloov mus cuam tshuam, cov kav dej sab saud tau tso dej tawm. Yog tias muaj dej ntau dhau, nws yuav ntws tawm. Nov yog qhov peb feem ntau pom hauv qee cov khoom siv hluav taws xob linear. MOS raj tsim hluav taws xob ntau, thiab lub zog hluav taws xob tsis muaj zog yog tag nrho hloov mus rau hauv lub zog hluav taws xob. Los ntawm qhov kev pom no, kev hloov pauv kev ua tau zoo ntawm cov khoom siv hluav taws xob linear yog qhov tsawg heev, thiab thaum tshav kub kub, lub neej ntawm cov khoom yog khi kom txo qis, cuam tshuam rau kev siv kawg. Uas tau hais tias, qhov sib txawv ntawm kev hloov pauv hluav taws xob thiab cov khoom siv hluav taws xob linear yog qhov lawv ua haujlwm.
Cov cuab yeej hluav taws xob ntawm cov khoom siv hluav taws xob ua haujlwm nyob rau hauv lub xeev linear, uas yog hais tias, lub zog hluav taws xob ib txwm ua haujlwm sai li sai tau thaum siv, yog li nws ua rau nws ua haujlwm qis, feem ntau ntawm 50% ~ 60 feem pua, thiab Nws yuav tsum tau hais tias nws yog heev linear fais fab mov. Txoj kev ua haujlwm ntawm cov khoom siv hluav taws xob linear ua rau nws tsim nyog yuav tsum muaj lub tshuab hluav taws xob hloov pauv ntawm qhov hluav taws xob siab mus rau qhov tsis muaj hluav taws xob. Feem ntau, nws yog transformer, thiab muaj lwm yam zoo li KX fais fab mov, uas ces rectifies thiab outputs DC voltage. Yog li ntawd, nws lub ntim yog loj, hnyav, tsis tshua muaj efficiency, thiab generates cua sov ntau. Nws kuj muaj nws qhov zoo: me me ripple, kev hloov kho tau zoo, thiab kev cuam tshuam me me sab nraud. Haum rau analog circuits, ntau yam amplifiers, thiab lwm yam.
Txhua tus tswj hwm siv cov lus tawm tswv yim (Feedback) kom ruaj khov rau qhov tso zis hluav taws xob. Cov zis hluav taws xob yog kuaj los ntawm qhov sib txawv ntawm cov resistor (Daim duab 6), thiab qhov kev faib tawm no tau muab rov qab rau ib qho kev tawm tswv yim ntawm qhov yuam kev amplifier. Lwm cov tswv yim ntawm qhov yuam kev amplifier txuas nrog rau qhov siv hluav taws xob, thiab qhov yuam kev amplifier yuav kho cov zis los ua Cov zis tam sim no ntawm Pass Transistor yog siv los tswj cov zis ruaj khov ntawm DC Voltage.
