Q nke circuit na redio ndibọbọ

Na nke ọ bụla redio dabeere na ụkpụrụ nke nhọrọ amụba mgbaàmà modulated site a ụfọdụ ụgbọelu ugboro, nke n'aka nke kpebisiri ike site resonance nke oscillating circuit, nke bụ isi mmewere nke erite circuit. Na-esi dozie a ugboro, na-adabere na àgwà nke natara mgbaàmà ga-ahọrọ.

Selectivity, ma ọ bụ erite selectivity kpebisiri ike site otú n'ókè iwetara adigide n'ikuku ga-attenuated, mgbe na-enye aka - na-mesikwuru. Q nke circuit - bụ ego anya gosiri na space okwu, ịga nke ọma nke a ozi.

The resonant ugboro nke circuit kpebisiri ike site Thompson usoro:

f = 1 / (2π√LC), nke

L - bụ inductance;

C - uru nke capacitance.

Iji ghọta otú nke oscillations-erukwa circuit, ị ga-aghọta otú o si arụ ọrụ.

Na capacitive, na inductive ibu gbochie omume nke ihe eletrik, ma na-eme ya na-abụghị. N'ihi ya, ha na ọnọdụ maka ntoputa nke oscillation usoro, banyere otu dị ka ọ na-eme na a Ngabiga mgbe abụọ skaters inupụ ha dị iche iche ntụziaka alternately. Theoretically, na-agbanwe uru nke capacitor ma ọ bụ eriri igwe, onye nwere ike nweta ihe na resonant ugboro nke loop idako na ụgbọelu ugboro nke mgbasa redio. The ogologo ha dị iche iche, ndị na-erughị ga-egosi àgwà. Na omume, erite na-ekiri site na-agbanwe capacitance nke capacitor.

The dum, ajụjụ bụ, otú nkọ ga-elu na eserese nke ugboro omume nke-erite. Dị nnọọ otú i nwere ike anya ịghọta otú bara uru mgbaàmà dị ka mgbochi-ewute ga-sikwuo ike. Na Q nke circuit bụ oke nke na-ekpebi selectivity n'ikuku.

Ọ na-akọwa site na usoro:

Q = 2πFW / P, ebe

F - na resonant ugboro nke circuit;

W - ume resonant circuit;

P - ike dissipation.

Q nke circuit ejikọrọ ke ukem na inductance nke capacitor kpebisiri ike site na-esonụ usoro:

Q = R√ (C / L)

Site ụkpụrụ nke inductance na capacitance doro anya, ndị na R, ọ na-eti na e wezụga reactance eriri igwe na a resistive akụrụngwa. Ya mere, circuit mgbe egosi circuit tinyere nime ya atọ ọcha: na capacitance C, inductance L na -eguzogide R.

Q nke circuit bụ a uru inversely proportional ka ọnụego nke ire ere oscillation nime ya. The ibu ọ bụ, na iji nwayọọ na ntụrụndụ nke usoro.

Na omume, kasị dị ịrịba ama ihe na-emetụta ndị Q nke circuit bụ àgwà nke eriri igwe, nke na-adabere na permeability nke ya isi, ọnụ ọgụgụ nke ibe, ogo iche waya na ya iguzogide, na site kwa na weere n'oge Itie elu ugboro okwukwo. Ya mere, na-agbanwe ugboro nke ochichi na-na-eji a na agbanwe capacitors, nke abụọ tent nke wafers n'ime na nke onye ọ bụla ọzọ n'oge adiana. Ndị dị otú ahụ a usoro a na-ahụkarị nke fọrọ nke nta niile na-abụghị digital redio.

Otú ọ dị, na-erite na dijitalụ n'iji ya gee ntị na-nwere ya resonant na sekit na sekit, nanị site ha resonant ugboro mgbanwe dị iche iche.