Amplifier vs Receiver
Amplifier thiab receiver yog ob hom khoom siv hluav taws xob tsim nyog siv hauv kev sib txuas lus. Feem ntau ib qho kev sib txuas lus tshwm sim ntawm ob lub ntsiab lus hu ua transmitter thiab receiver los ntawm ib lub xov tooj lossis wireless nruab nrab. Transmitter xa cov teeb liab uas muaj qee cov ntaub ntawv thiab receiver grabs lub teeb liab thiaj li yuav rov tsim cov ntaub ntawv. Tom qab taug kev deb, feem ntau, lub teeb liab tau qaug zog (attenuated) vim lub zog poob hauv nruab nrab. Yog li ntawd, thaum lub teeb liab tsis muaj zog no tau txais ntawm lub receiver, nws yuav tsum tau txhim kho (los yog amplified). Amplifier yog lub voj voog uas nthuav tawm cov teeb liab tsis muaj zog rau lub teeb liab nrog lub zog ntau dua.
Amplifier
Amplifier (tseem luv luv li amp) yog ib qho hluav taws xob hluav taws xob, uas ua rau lub zog ntawm cov teeb liab tawm tswv yim. Muaj ntau hom amplifiers xws li lub suab amplifiers mus rau optical amplifiers ntawm ntau zaus. Lub transistor tuaj yeem teeb tsa ua lub suab nrov yooj yim. Qhov sib piv ntawm cov teeb liab tso zis hluav taws xob rau lub zog hluav taws xob input hu ua 'tau' ntawm amplifier. Kev nce yuav yog ib qho txiaj ntsig nyob ntawm daim ntawv thov. Feem ntau qhov nce tau hloov mus rau hauv decibels (logarithmic nplai) kom yooj yim.
Bandwidth yog lwm qhov tseem ceeb rau cov amplifiers. Nws yog qhov ntau zaus ntawm lub teeb liab uas amplified nyob rau hauv txoj kev xav. 3dB bandwidth yog tus qauv ntsuas rau amplifiers. Efficiency, linearity thiab slew npaum li cas yog ib co ntawm lwm yam tsis yuav tsum tau xav txog thaum tsim ib tug amplifier circuit.
Tus neeg txais
Receiver yog lub tshuab hluav taws xob hluav taws xob uas tau txais thiab rov tsim cov teeb liab kis los ntawm lub tshuab xa hluav taws xob los ntawm txhua qhov nruab nrab. Yog tias qhov nruab nrab yog xov tooj cua wireless, tus txais yuav muaj lub kav hlau txais xov los hloov cov hluav taws xob nthwv dej rau hauv lub teeb liab hluav taws xob thiab lim kom tshem tawm cov suab nrov tsis xav tau. Qee lub sij hawm receiver unit kuj tseem muaj xws li amplifiers los ua kom lub zog tsis muaj zog thiab kev txiav txim siab thiab demodulation unit los tsim cov ntaub ntawv qub. Yog hais tias qhov nruab nrab yog xaim, yuav tsis muaj tus kav hlau txais xov thiab nws yuav raug hloov los ntawm lub teeb pom kev yees duab hauv kev teeb pom kev pom.
Qhov txawv ntawm amplifier thiab receiver
1. Feem ntau, amplifier yog ib feem ntawm lub receiver.
2. Amplifier yog siv los ua kom pom lub teeb liab, qhov chaw txais tau siv los tsim cov teeb liab xa mus ntawm lub transmitter
3. Muaj ntau zaus amplifier yuav yog ib feem ntawm tus txais
4. Qee zaum, amplifiers qhia qee lub suab nrov rau lub teeb liab uas cov neeg txais tau ib txwm ua kom tshem tawm suab nrov.
