Qhov sib txawv tseem ceeb ntawm cov teeb liab analog thiab cov teeb liab yog qhov teeb liab analog yog lub sijhawm txuas ntxiv thaum lub teeb liab digital yog lub sijhawm tsis sib xws.
Ib lub teeb liab nqa cov ntaub ntawv ntawm ib lub cuab yeej mus rau lwm qhov. Hauv Hluav Taws Xob Engineering, lub teeb liab yog qhov tseem ceeb ntawm cov ntaub ntawv sawv cev. Nyob rau hauv cov ntsiab lus ntawm Mathematics, nws yog ib tug muaj nuj nqi uas conveys cov ntaub ntawv. Analog teeb liab thiab cov teeb liab digital yog ob pawg ntawm cov teeb liab.
Dab tsi yog Analog Signal?
Ib qho teeb liab analog yog lub teeb liab txuas ntxiv, thiab nws hloov pauv raws sijhawm. Lub sine yoj sawv cev rau qhov teeb meem no qhov twg, amplitude, lub sij hawm thiab zaus yog qee yam los piav txog nws tus cwj pwm. Lub amplitude yog qhov siab tshaj plaws ntawm lub teeb liab. Zaus (f) yog tus lej ntawm lub voj voog ib chav tsev ntawm lub sijhawm. Lub Sijhawm (T) yog lub sijhawm ua kom tiav ib lub voj voog (T=1/f).
Daim duab 01: Analog Signal
Nws nyuaj rau kev txheeb xyuas lub teeb liab analog vim tias nws muaj ntau tus nqi. Nws muaj cov txiaj ntsig tsis zoo thiab cov txiaj ntsig zoo. Tsis tas li ntawd, lub zog noj ntawm cov cuab yeej analog yog siab. Feem ntau, cov teeb liab analog muaj qhov ua rau poob qhov zoo ntawm kev sib kis vim muaj kev cuam tshuam. Ib qho piv txwv ntawm cov teeb liab no hauv peb lub neej niaj hnub yog tib neeg lub suab.
Digital Signal yog dab tsi?
Ib lub teeb liab digital yog lub sijhawm tsis sib txuas thiab tsis sib xws. Thiab nws yuav siv sij hawm daim ntawv ntawm ib tug square yoj. Nws sawv cev rau cov ntaub ntawv hauv daim ntawv binary uas yog ib qho (1) thiab xoom (0). Qhov 1 sawv cev rau qhov muaj txiaj ntsig siab thaum lub 0 sawv cev rau cov nqi qis. Cov teeb liab no tsis muaj qhov tsis zoo xws li hauv cov teeb liab analog.
Daim duab 02: Digital Signal
Siv cov teeb liab analog hauv kev sib txuas lus tuaj yeem ua rau muaj teeb meem. Piv txwv li, nws yog ib qho nyuaj rau kev sib txuas lus nyob deb vim yog lub teeb liab distortion, cuam tshuam thiab lwm yam Digital signals yog ib qho kev daws teeb meem zoo rau qhov teeb meem no. Lawv tsis tshua muaj kev cuam tshuam. Yog li ntawd, cov teeb liab analog tau hloov mus rau hauv cov teeb liab digital rau kev sib txuas lus meej thiab raug. Cov xov tooj digital, khoos phis tawj, thiab lwm yam khoom siv hluav taws xob siv cov teeb liab digital.
Kev sib raug zoo ntawm Analog Signal thiab Digital Signal yog dab tsi?
Ib lub teeb liab yog ib qho piv txwv ntawm cov teeb liab analog nyob rau lub sijhawm
Qhov txawv ntawm Analog Signal thiab Digital Signal yog dab tsi?
Analog Signal vs Digital Signal |
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| Ib qho teeb liab analog yog lub teeb liab txuas ntxiv uas hloov pauv lub sijhawm. | Ib lub teeb liab yog lub teeb liab discrete uas nqa cov ntaub ntawv hauv binary daim ntawv. |
| Kev ntsuas | |
| nyuaj rau txheeb xyuas | Yooj yim txheeb xyuas |
| Tus sawv cev | |
| Tsab los ntawm sine yoj | Ib square nthwv dej sawv cev rau lub teeb liab no |
| Ntau | |
| Muaj ntau tus nqi uas tuaj yeem yog qhov zoo lossis tsis zoo | Nyob rau hauv ib qho kev txwv. Nws tuaj yeem muaj 0 lossis 1 |
| Distortion | |
| Nws muaj kev xav ntau dua los hloov pauv | Nws muaj qhov tsis tshua muaj kev cuam tshuam |
| Khaws cov ntaub ntawv nyob rau hauv daim ntawv ntawm yoj teeb liab. Yog li nws yuav tsum muaj kev nco tsis kawg. | Khaws cov ntaub ntawv hauv ib daim ntawv ntawm binaries. |
| Examples | |
| Tib neeg hais lus, tam sim no voltage, thiab tam sim no yog ob peb yam piv txwv ntawm analog signals. | Piv txwv ntawm cov teeb liab yog cov teeb liab hauv Computers, optical drivers, thiab digital phones. |
Summary – Analog Signal vs Digital Signal
Qhov sib txawv ntawm cov teeb liab analog thiab cov teeb liab digital yog qhov teeb liab analog yog lub sijhawm txuas ntxiv thaum lub teeb liab digital yog lub sijhawm tsis sib xws. Hauv kev luv luv, cov teeb liab digital muaj kev ntseeg siab dua thiab muaj qhov sib kis tau nrawm dua li cov cim analog.
