2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nugative-feedback amplifier rho ib feem ntawm nws cov zis tawm los ntawm nws cov tswv yim kom cov tswv yim tsis zoo tawm tsam tus thawj lub teeb liab. … Yog li, ob-theem amplifier nrog kev tawm tswv yim tsis zoo yog ib txwm ruaj khov.
Qhov twg yog qhov tsis zoo tawm tswv yim hauv amplifier?
Ib tug tsis zoo-feedback amplifier (los yog tawm tswv yim amplifier) yog ib qho hluav taws xob amplifier uas rho ib feem ntawm nws cov zis los ntawm nws cov tswv yim, thiaj li hais tias tsis zoo tswv yim tawm tsam tus thawj teeb liab.
Dab tsi yog qhov cuam tshuam ntawm kev tawm tswv yim tsis zoo hauv qhov nce ntawm lub tshuab hluav taws xob?
tawm tswv yim tsis zoo txo qhov nce ntawm lub suab nrov. Nws kuj txo cov distortion, suab nrov thiab instability. Cov lus tawm tswv yim no nce bandwidth thiab txhim kho cov tswv yim thiab tso tawm impedances.
Yuav ua li cas nce nrog kev tawm tswv yim tsis zoo?
Nyob rau hauv kev tawm tswv yim tsis zoo, lub zog tawm tswv yim (voltage lossis tam sim no), tawm ntawm theem nrog cov teeb liab tawm tswv yim thiab yog li tawm tsam nws. Kev tawm tswv yim tsis zoo txo qhov nce ntawm lub amplifier. Nws kuj txo cov distortion, suab nrov thiab instability. Qhov kev tawm tswv yim no nce bandwidth thiab txhim kho cov tswv yim thiab tso tawm impedance.
Yuav tsum muaj kev tawm tswv yim tsis zoo hauv op amp yog dab tsi?
Ib qho op-amp nrog cov lus pom tsis zoo yuav sim tsav nws cov zis hluav taws xob mus rau qib twg tsim nyogkom qhov sib txawv ntawm qhov sib txawv ntawm ob qhov khoom siv yog xoom. Qhov siab dua qhov op-amp sib txawv nce, qhovze dua qhov sib txawv voltage yuav yog xoom.
Pom zoo:
Ib qho ntawm cov hauv qab no yog cov piv txwv ntawm cov lus pom zoo rau huab cua?
Cov kws tshawb fawb tau paub txog ntau qhov kev tawm tswv yim zoo hauv kev nyab xeeb. Ib qho piv txwv yog melting ice. Vim tias cov dej khov muaj lub teeb-xim thiab muaj kev cuam tshuam, feem ntau ntawm cov hnub ci uas tsoo nws tau rov qab mus rau qhov chaw, uas txwv qhov kub ntawm qhov nws ua rau.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Qhov twg hauv qab no yog qhov piv txwv ntawm qhov tsis suav nrog cov lej tsis suav nrog?
Pi is a non-terminating, non-repeating decimal. π=3.141 592 653 589 793 238 462 643 383 279 … e is a non-terminating, non-repeating decimal. Ib qho piv txwv ntawm tus lej tsis suav nrog yog dab tsi? Piv txwv: 0.5, 2.456, 123.456, thiab lwm yam.
Nyob rau hauv ib qho kawg sib txawv amplifier ua haujlwm?
(A) Cov zis yog grounded. (B) Ib qho kev tawm tswv yim yog grounded thiab lub teeb liab raug siv rau lwm qhov. Raws li lub npe tau hais tseg, ib qho kev sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhovcim uas tau muab los ntawm tsuas yog ib qho ntawm cov tswv yim.
Rau ib qho emitter amplifier lub hom phiaj ntawm swamping yog?
Kev piav qhia: Lub swamping resistor yog ib qho kev tsis sib haum xeeb nyob rau hauv lub emitter (re) circuit of a common-emitter amplifier. Lub swamping resistorstabilizes qhov nce voltage thiab txo qis distortion. … Cov txheej txheem no pab cais cov DC kev tsis ncaj ncees ntawm ob lub voj voog sib txuas.
