Q we wesifunda kanye eyamukelayo umsakazo

Kunoma umsakazo esekelwe isimiso isignali ukukhiqizwa kabusha abakhethayo modulated ngumuntu yenethiwekhi imvamisa ezithile, nakho kunqunywa resonance kwe-circuit oscillating, okuyinto element eyinhloko circuit umamukeli. On uyilungisa kanjani le imvamisa, kuncike izinga isignali eyamukelwe izokhetheka.

Selectivity, noma umamukeli selectivity kunqunywa indlela amasignali kwaphazamiseka reception esimeme uzobe attenuated, kuyilapho eziwusizo - kuthiwa nakakhulu. Q kwe-circuit - inani elibanzi wabonisa ngokuya zezinombolo, impumelelo lo msebenzi.

Imvamisa resonant kwe-circuit kunqunywa ifomula Thompson:

f = 1 / (2π√LC), lapho

L - iyona inductance;

C - ukubaluleka capacitance.

Ukuze uqonde ukuthi oscillations zenzeka yesifunda, kufanele uqonde ukuthi isebenza kanjani.

Futhi capacitive okuseqophelweni, kanye exhasa ukuvimbela okuvela kuyo i kagesi, kodwa ukukwenza okuphambene. Kanjeyana they ukudala izimo ngoba ukuvela inqubo oscillation, mayelana efanayo njengoba enza ku-jika lapho bemizimba ezimbili baphoqelele nabo bacondze etindzaweni letehlukene yanjalo. Kwakucatshangwa ukuthi ushintsha ukubaluleka capacitor noma ikhoyili, omunye ingafinyelela ukuthi imvamisa resonant loop kuhambisane imvamisa othwala omsakazo. The eside abahluke, kuyancipha izinga isignali. Ekusebenteni, sewugubha ubukele ngokushintsha capacitance we capacitor.

lonke Umbuzo uwukuthi, indlela abukhali ngeke Peak kugrafu we impendulo imvamisa owamukelayo. Vele ngakho ungakwazi zibukeke baqonde isignali indlela ewusizo siphazanyiswe ukuyiveza luzoqiniswa. Futhi Q kwe-circuit kuyinto ipharamitha okuyinto inquma selectivity i-reception.

It is kuchazwe ifomula:

Q = 2πFW / P, lapho

F - imvamisa resonant we wesifunda;

W - amandla phezu kwengungu resonant;

P - amandla ukushabalalisa.

Q kwe-circuit exhunywe ngokulinganisa kanye inductance we capacitor kunqunywa ifomula elandelayo:

Q = R√ (C / L)

Kusukela amagugu inductance kanye capacitance ecacile, futhi njengoba i-R, it is wakhumbula ukuthi ngaphandle reactance ikhoyili isakhi resistive. Ngakho-ke, circuit ngokuvamile zibonisa wesifunda kuhlanganise therein ezintathu izakhi: capacitance C, inductance L futhi ukumelana R.

Q kwe-circuit liyinani inhlukanozigaba ukuba izinga zokuwohloka oscillation therein. I emikhulu kunjalo, kancane ukuphumula kohlelo.

Ngo umkhuba, isici eziphawuleka kakhulu ezithinta Q kwe-circuit ikhwalithi ikhoyili, okuyinto incike le permeability ka enkabeni yalo, inani badedelane, lokwehlukaniswa wire futhi ukumelana layo, futhi kusukela ukulahlekelwa ngesikhathi ukudlula ephezulu imvamisa imisinga. Ngakho-ke, ukuze ulungise imvamisa yokuphathwa ngokuvamile wasebenzisa capacitors variable, okuyizinto amasede amabili eziyizingcwecwana ku futhi aphume nomunye phakathi ukujikeleza. uhlelo ezinjalo esivamile cishe yonke imisakazo ze-non-digital.

Nokho, e-umamukeli nge Tuning digital Ubuye izifunda ayo resonant, ngokumane resonant imvamisa izinguquko zabo ngokwehlukile.