UHF Oscillator: 5 Kauj Ruam

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

Ib qho transistor yam tsawg kawg nkaus tivthaiv oscillator tsim cov cim hauv ultra ntau zaus ntau-ob peb puas Megahertz. Kuv tau ntsuas nws cov zaus ntawm no:

Kauj Ruam 1: Peb - Dee Los Ua Ke

Kuv tau sib sau ua ke no txhawm rau paub qhov txwv ntawm kev siv oscillation zaus ntawm lub transistor los ntawm kuv lub thawv khib nyiab. Tom qab nws ua tiav, nws yuav tsum siv los ua lub teeb liab rau qee qhov kev sib tw uhf.

Qhov zaus ntawm tus oscillator nyob ntawm qhov hloov pauv hauv Circuit Court - kev sib txuas sib txuas ntawm tus inductor thiab lub capacitor. Kuv yuav tsum tsis txhob siv lub tshuab hluav taws xob cais, nyob ntawm qhov muaj peev xwm ntawm cov thaiv thiab lub peev txheej sab hauv ntawm transistor rau txoj haujlwm no. Cov inductor yuav tsum tau ua pluggable, yog li kuv tuaj yeem siv txuas ntxiv me me inductors kom txog thaum lub Circuit Court nres oscillating. Qhov tsawg tshaj plaws inductor uas tseem tso cai rau kev ua haujlwm hauv Circuit Court yuav tsum tsim kom muaj ntau zaus. Rau kev txhawb nqa tus inductor, Kuv tab tom siv me me seem ntawm cov laug cam ntawm lub kaum sab xis mus rau ib qho loj dua, thiab txhawb los ntawm struts ntawm cov txuas txuas txuas hauv. Cov khoom yuav tsum tau muab tso ze ua ke kom txo qis qhov inductance thiaj li yuav ua tiav qhov siab tshaj plaws. Nws txhua yam pib nrog daim duab qhia chaw - Kuv tau faib kwv yees li ob feem peb ntawm cov khoom siv hluav taws xob raws li Vce thiab ib puag ncig 5 ma ntawm cov khoom siv tam sim no nrog cov khoom siv hluav taws xob ntawm 12V. M/s Freescale tsuas yog muab cov ntawv tom qab-nws ceeb toom kuv tau siv los kos qhov Circuit no. Lawv tsis pom zoo lossis pom zoo rau qhov kev sib tw no hauv txhua txoj kev.

Kauj Ruam 2: Qhov (socket), Transistor thiab Capacitor

Lub qhov (socket) kom lees paub tus inductor, transistor thiab lub hauv paus hla dhau lub capacitor (1nf) tau txuas nrog. Daim duab kab hluav taws xob tau hais qhia kom pom cov khoom siv ntawm lub nkoj. Cov xaim xaim tso rau hauv ob lub qhov (socket) tsuas yog dummy kom lawv tsis txhob ntog tawm thaum lub tshuab ziab khaub ncaws kom sov rau lwm yam.

Kauj Ruam 3: Ntxiv cov Resistors

Cov resistors tau soldered nyob rau tom ntej. Lawv tsis yog qhov tseem ceeb, txawm li cas los xij, txhawm rau ua kom lub rooj sib txig sib luag kom lwm theem lossis cov cuab yeej tuaj yeem haum rau lub rooj tsavxwm tom qab, lawv tau sib zog ua ke tawm tsam lub transistor.

Ib lub hlaws ferrite (daim ntawm cov tub ntxhais ferrite nrog lub qhov hauv nruab nrab) tau muab tso rau ntawm cov hlau lead ntawm cov emitter resisor los tsim lub me me inductor nyob ntawd. Feem ntau, thaum sib nrug qub rf iav, Kuv hla hla cov coils uas muaj ferrite cores hauv lawv. Qee qhov ntawm cov cores muaj qhov hla los ntawm lawv thiab lawv tau txais kev cawmdim li cov hlaws ferrite.

Kauj Ruam 4: Tiav Circuit Court Tiav

Tam sim no lub Circuit Court tau ua tiav, thiab ib daim hlau tau txuas rau hauv kev tsim cov inductor. Nws ua haujlwm, raws li koj tuaj yeem pom los ntawm kev saib cov yeeb yaj kiab txuas.

Kauj Ruam 5: Nws Zoo Li Cas Rau?

Koj pom peb tus neeg taug kev ntawm txoj kev (tej zaum mus rau tshoob). Koj nres ib ntawm lawv. Koj rub tus menyuam me no los ntawm koj lub hnab tshos. "Saib ntawm no! Nws yog Ultra High Frequency Oscillator". "Dab tsi?" Nws nug, tshee hnyo saib ua ntej ntawm ob tus neeg muaj hmoo uas tau txais nyob deb. "Koj paub, nws tsim lub teeb liab uas hloov pauv ntau dua li ob peb puas lab lub sijhawm ib pliag!" Cov ntaub ntawv no, hmoov tsis, zoo li tsis txaus siab rau cov neeg ua tshoob tsis muaj hmoo ntau. Koj tau txais tib yam kev kho mob qub tub rog caij nkoj yuav tsum tau txais, thaum taug kev ncig nrog nws zaj dab neeg ntawm tuag albatross. OK. Dab tsi yog qhov zoo rau, raws nraim? Kuv lub hom phiaj hauv kev tsim nws yog kom tau txais lub teeb liab los txhawm rau txheeb xyuas kuv kev sau cov transistors qub thiab niaj hnub no rau ob pawg - ib pawg ntawm cov cuab yeej siv tau ntau zaus thiab lwm qhov, tsis yog. zaus ntawm oscillation? Lub zog tso tawm yog dab tsi? Kuv tsis paub, tab sis muaj cov txhais tau tias yuav tshawb nrhiav, thiab thaum kuv ua, kuv yuav qhia rau koj txhua tus paub. Kuv tau muab nws tso rau ntawm lub desktop. Nws tsis zoo li cas?