Amplitude Modulator thiab Demodulator Trainer Kit: 5 Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:31

• Kev hloov kho yog tus txheej txheem sib txawv ntawm ib lossis ntau qhov khoom ntawm lub nthwv dej ib ntus (cov teeb liab thauj khoom) nrog cov hloov pauv teeb liab (cov ntaub ntawv) kom xa mus.

• Tus modulator yog ib lub cuab yeej uas ua haujlwm hloov pauv.

• Tus demodulator yog ib qho cuab yeej siv uas ua rau demodulation, qhov hloov pauv ntawm kev hloov pauv.

• Hauv AM, qhov dav (qhov muaj zog lub zog) ntawm cov yoj yoj yoj yoj yog qhov sib txawv hauv qhov sib txawv ntawm qhov kev hloov pauv.

• Qhov kev hloov pauv ntawd, piv txwv li, sib raug rau lub suab kom rov tsim dua los ntawm tus hais lus, lossis lub teeb pom kev zoo ntawm TV pixels.

Yam uas yuav tsum tau:-

Rau AM Modulator:-

1.1N4148 Diode

2. Resistor: 2.2K (2pcs)

3. Inductor: 10 µH

4. Trimmer: 3-40 pF

Rau AM Demodulator:-

1.1N34 Diode

2. Resistor: 10K

3. Capacitor: 10nF

Lwm tus:-

Loj: 6 "x 8"

Txiv tsawb Qhov Ncauj: Liab-Dub (5 khub)

Kauj ruam 1: Tus Txheej Txheem Txheej Txheem

Kev hloov kho yog txheej txheem feem ntau siv rau kev tshaj tawm cov suab qis qis rau lub sijhawm ntev dua. Ntawm no lub suab qis qis tshaj yog qhov sib txuam nrog cov neeg siv khoom siab nthwv dej. Qhov kev hloov pauv qhov dav yog qhov twg qhov dav ntawm qhov siab ntawm cov neeg nqa khoom siab tau hloov pauv raws li qhov siv ntawm lub teeb liab tab sis qhov zaus ntawm qhov hloov pauv yuav zoo ib yam.

Kauj Ruam 2: Yuav Ua Li Cas Hloov Circuit Court

Qhov kev hloov pauv diode yooj yim no muab cov txiaj ntsig tau zoo thaum siv rau kev hloov pauv feem ntau ntawm cov teeb liab qis. Qhov tsis tu ncua tau qhia rau tus neeg nqa khoom zaus txog 10 MHz, tab sis, nrog lub tank tsim nyog, Circuit Court yuav muab cov txiaj ntsig zoo ntawm txhua zaus uas cov diode kwv yees qhov hloov pauv zoo. Txhawm rau txuas ntxiv zaus ntau dua qhov uas IN4148 haum, qhov kub-thauj cov diode (HP2800, thiab lwm yam) tuaj yeem hloov tau.

Shunt resistor hla lub tank hluav taws xob tuaj yeem siv los txo qis Circuit Court Q thiaj li tso cai feem pua kev hloov pauv yam tsis muaj qhov cuam tshuam qhov cuam tshuam.

Kauj ruam 3: Demodulator Txheej txheem cej luam

Rov qab tau cov lus qub los ntawm tus neeg nqa khoom hloov pauv hu ua demodulation thiab qhov no yog lub hom phiaj tseem ceeb ntawm kev sib txuas lus thiab kev txais xov tooj. Lub voj voog uas tau siv dav los rhuav tshem cov cim AM yog hu ua lub hnab ntim lub ntsuas.

Raws li koj tuaj yeem pom, lub kho kom raug theem chops AM teeb liab hauv ib nrab cia tsuas yog ib qho ntawm nws lub hnab ntawv hla lub hnab ntawv sab saud hauv qhov no tab sis lub hnab ntawv qis dua zoo ib yam. Lub teeb liab no tau pub rau RC LPF uas taug qab qhov siab ntawm nws cov tswv yim. Thaum cov tswv yim rau RC LPF yog kho lub teeb liab AM, nws taug qab lub teeb liab lub hnab ntawv. Qhov tseem ceeb, raws li lub hnab ntawv zoo ib yam li cov lus, RC LPF qhov hluav taws xob tso tawm kuj tseem zoo ib yam li cov lus thiab yog li AM lub teeb liab tau raug tshem tawm.

Kauj Ruam 4: Yuav Ua Li Cas Demodulator Circuit

Lub hnab ntawv ntsuas lub tshuab hluav taws xob siv lub diode, lub tshuab hluav taws xob thiab lub zog tiv thaiv thiab nws zoo ib yam li ib nrab nthwv dej rectifier ua raws los ntawm lim qis. Nws yog lub ntsuas hluav taws xob tawm uas siv qhov siab RF teeb liab raws li kev nkag thiab muab cov zis uas yog lub hnab ntawv ntawm lub teeb liab nkag mus. Lub tshuab ntsuas lub diode yog hom lub hnab ntim lub ntsuas thiab siv rau kev kuaj pom ntawm AM teeb liab.

Ntawm no cov teeb liab nkag tau raug kho los ntawm koob diode D. Kev sib xyaw ua ke ntawm lub tshuab hluav taws xob C thiab tus tiv thaiv R coj zoo li lub lim dej qis. Cov teeb liab tawm tswv yim muaj ob qho tib si thawj cov lus thiab tus xa khoom nthwv dej qhov twg lub tshuab hluav taws xob pab hauv kev lim tawm cov xov tooj cua RF. Tus capacitor tau them thaum lub ntug nce thiab tso tawm los ntawm tus tiv thaiv R hauv ntog ntug. Yog li lub tshuab hluav taws xob pab hauv kev muab lub hnab ntawv ntawm cov tswv yim raws li cov zis.

Kauj Ruam 5: Tus Kws Qhia Txuj Ci

Cov khoom siv kawg yog nyob ntawm no. Laum tshuab tuaj yeem siv los tsim qhov raws li txiv tsawb qhov loj me thiab nruj nreem nrog cov txiv ntoo kom cov hlua txuas tuaj yeem hloov kho.