Video: Op amp tawm tswv yim ua haujlwm li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Txuas cov zis ntawm ib op - amp rau nws inverting (-) input yog hu ua negative tawm tswv yim . Lub sij hawm no tuaj yeem siv dav rau txhua qhov kev ua haujlwm dynamic qhov twg cov teeb liab tso zis yog "fed rov qab" rau cov tswv yim kom ncav cuag qhov sib npaug (sib npaug).
Xav txog qhov no, kev tawm tswv yim hauv op amp yog dab tsi?
Tawm tswv yim yog cov txheej txheem tsim qhov twg ib feem ntawm lub amplifier tso zis "feeds rov qab" rau cov tswv yim ntawm cov amplifier . Tag nrho cov nyhuv tsim ib tug ruaj khov nce heev txiav txim los ntawm resistor ratios.
Tsis tas li ntawd, vim li cas cov lus tawm tswv yim siv hauv op amp circuits? 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, op amp ua haujlwm li cas?
Ib ua haujlwm amplifier , los yog ua amp , feem ntau suav nrog theem sib txawv ntawm qhov kev tawm tswv yim nrog cov kev tawm tswv yim siab impedance, theem nruab nrab-tau txais, thiab lub laub-rub tawm theem nrog cov zis impedance qis (tsis ntau tshaj 100 Ω) (Fig. 1). Ntawd yog, cov zis tau txais rov qab mus rau inverting input los ntawm qee qhov impedance.
Vim li cas cov lus pom zoo tsis siv hauv op amp?
Hauv ib op - amp Circuit nrog tsis muaj lus teb , muaj tsis muaj kho mechanism, thiab cov zis voltage yuav saturate nrog tus nqi tsawg tshaj plaws ntawm qhov sib txawv voltage thov ntawm cov inputs.
Pom zoo:
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