Video: Vim li cas cov lus pom zoo tsis siv hauv op amp?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tom qab ntawd peb tuaj yeem pom qhov ntawd zoo tswv yim ua tsis yog cia lub Circuit Court ua haujlwm raws li ib qho amplifier raws li cov zis voltage sai sai saturates rau ib qho khoom siv rail los yog lwm yam, vim nrog zoo tswv yim loops "ntau ua rau ntau" thiab "tsawg ua rau tsawg".
Tom qab ntawd, ib tus tuaj yeem nug, qhov txawv ntawm qhov kev tawm tswv yim zoo thiab kev tawm tswv yim tsis zoo op amps yog dab tsi?
Lub ntsiab qhov sib txawv ntawm qhov tsis zoo thiab zoo tswv yim yog tias, qhov nce ntawm lub kev tawm tswv yim tsis zoo yog txo thiab cov bandwidth yog nce, lub tawm tswv yim teeb liab yog 180 degree tawm ntawm theem ntawm input teeb liab, cov no tawm tswv yim yog siv hauv amplifier thiab nws txoj kev ruaj ntseg zoo dua.
Tom qab ntawd, lo lus nug yog, dab tsi yog qhov xav tau ntawm kev tawm tswv yim hauv op amp? Lub hom phiaj ntawm DC tawm tswv yim yog los txhais qhov koj xav tau op - amp ua, piv txwv li nws cov zis voltage yuav ua li cas. Yog tsis muaj nws, cov zis yuav nce los yog poob mus txog rau thaum nws hits lub hwj chim rails. Qhov no tuaj yeem pab tau, thiab muaj kev lag luam loj rau op - cov amps tshwj xeeb los ua haujlwm li no, hu ua "comparators".
Ib yam li ntawd, tib neeg nug, vim li cas op amp tsis muaj kev tawm tswv yim tsis siv rau hauv daim ntawv thov kab hluav taws xob?
Yog peb tsis txhob siv ib tawm tswv yim , cov op - amp yuav txawm mus saturation los yog txiav tawm. Txawm li cas los xij, yog tias peb siv ib tawm tswv yim nws yuav nyob hauv kab tawm cheeb tsam thiab qhov kev xav ntawm thaj av virtual yuav yuav siv tau (piv txwv li lub peev xwm ntawm + thiab - terminals yog tib).
Cov lus teb tsis zoo hauv opamp yog dab tsi?
Cov lus teb tsis zoo yog tus txheej txheem ntawm "paub rov qab" ib feem ntawm cov zis teeb liab rov qab mus rau lub tswv yim, tab sis ua kom cov tawm tswv yim tsis zoo , peb yuav tsum pub nws rov qab rau lub tsis zoo los yog "inverting input" davhlau ya nyob twg op-amp siv sab nraud Tawm tswv yim Resistor hu ua Rƒ.
Pom zoo:
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