Nzacha ihe nzacha, nke a makwaara dị ka LC filter, bụ sekit nzacha nke nwere inductance, capacitance na nguzogide, nke nwere ike nyochaa otu ma ọ bụ karịa harmonics. Kacha nkịtị na mfe iji passive nzacha Ọdịdị bụ jikọọ inductance na capacitance na usoro, nke nwere ike na-etolite a ala impedance uzo maka isi harmonics (3, 5 na 7); Otu nzacha a na-ege ntị, ihe nzacha elele okpukpu abụọ na nzacha ngafe dị elu bụ ihe nzacha na-agafe agafe.
uru
Ihe nzacha na-agafe agafe nwere uru nke usoro dị mfe, ọnụ ala dị ala, ntụkwasị obi dị elu na ụgwọ ọrụ dị ala. A ka na-eji ya eme ihe n'ọtụtụ ebe dị ka usoro njikwa harmonic.
nhazi ọkwa
Njirimara nke nzacha LC ga-ezute ihe ndeksi teknụzụ akọwapụtara. Ndị a teknuzu chọrọ na-emekarị na-arụ ọrụ attenuation na ugboro ngalaba, ma ọ bụ oge mgbanwe, ma ọ bụ abụọ; Mgbe ụfọdụ, a na-atụ aro nzaghachi oge na ngalaba oge. Enwere ike kewaa ihe nzacha na-agafe agafe ụzọ abụọ: ihe nzacha emeziri na ihe nzacha dị elu. N'otu oge ahụ, dị ka usoro nhazi dị iche iche si dị, enwere ike kewaa ya n'ime ihe nzacha ihe oyiyi na nzacha parameter na-arụ ọrụ.
Ntugharị nzacha
Ntugharị nlegharị anya na-agụnye otu nzacha nlegharị anya yana nzacha nlegharị anya okpukpu abụọ, nke nwere ike yochaa otu (otu nlegharị anya) ma ọ bụ abụọ (ugboro abụọ) harmonics. A na-akpọ ugboro nke harmonics ugboro resonant nke nzacha nzigharị.
Ntucha ngafe dị elu
High pass filter, makwaara dị ka njupụta mbelata filter, tumadi na-agụnye mbụ-iji elu ngafe nyo, nke abụọ-iji elu ngafe filter, atọ-usoro elu ngafe filter na C-ụdị filter, nke na-eji budata attenuate harmonics ala karịa a ụfọdụ ugboro, nke a na-akpọ ebipụ ugboro nke elu ngafe nyo.
Ihe nzacha ihe onyonyo
Emebere nzacha ma mejuputa ya dabere na tiori nke parampat onyonyo. Ihe nzacha a nwere ọtụtụ ngalaba ndị bụ isi (ma ọ bụ ọkara ngalaba) nke etinyere n'ụkpụrụ nke mgbochi nha nhata na njikọ ahụ. Enwere ike kewaa akụkụ nke isi n'ime ụdị K nke edoziri na ụdị nke m nwetara dịka usoro sekit si dị. Inweta nzacha obere ngafe LC dị ka ọmụmaatụ, nkwụsịtụ nkwụsị nke ngalaba K-ụdị obere ngafe dị ala na-abawanye monotonically na mmụba nke ugboro ole; M-enwetara ọnụ ala dị ala na-agafe agafe nwere ọnụ ọgụgụ attenuation n'otu oge na nkwụsịtụ, na ọnọdụ nke attenuation elu na-achịkwa site na m uru na m-ewepụtara ọnụ. Maka nzacha nfefe dị ala nke akụkụ ndị bụ isi nke Cascaded Low-Pass mejuru, nhụsianya dị n'ime ya ruru nchikota nchikota nke ngalaba ọ bụla bụ isi. Mgbe n'ime impedance na ibu impedance nke ike ọkọnọ akwụsị na abụọ nsọtụ nke nzacha bụ hà image impedance na abụọ nsọtụ, na-arụ ọrụ attenuation na-adọ mgbanwe nke nyo bụ hà ha pụta ụwa attenuation na-adọ mgbanwe n'otu n'otu. (a) Ihe nzacha egosiri bụ akụkụ K edoziri na akụkụ abụọ ewepụtara na cascade. Z π na Z π m bụ ihe mgbochi onyonyo. (b) Bụ njirimara ugboro attenuation ya. Ọkwa nke abụọ attenuation elu / f ∞ 1 na f ∞ 2 na nkwụsi ike na-ekpebi n'otu n'otu site na m ụkpụrụ nke abụọ m ewepụtara ọnụ.
N'otu aka ahụ, nnukwu ngafe, band-pass na band stop filter nwekwara ike ịbụ nke akụkụ ndị dabara adaba.
Ihe oyiyi impedance nke nzacha enweghị ike ịha nhata dị ọcha resistive esịtidem nguzogide nke ike ọkọnọ na ibu impedance na dum ugboro band (iche dị ukwuu na stopband), na pụta ụwa attenuation na-arụ ọrụ attenuation dị nnọọ iche na passband. Iji hụ na mmezu nke ihe ngosi nka, ọ na-adịkarị mkpa idobe oke nbibi zuru oke ma bulie obosara passband na nhazi ahụ.
Nzacha oke ọrụ
Nke a nzacha na-emi esịnede cascaded isi ngalaba, ma na-eji netwọk ọrụ nke nwere ike n'ụzọ anụ ahụ ghọtara site R, l, C na ibe inductance ọcha n'ụzọ ziri ezi na oru nkọwa nke nzacha, na mgbe ahụ na-aghọta kwekọrọ ekwekọ nyo circuit site nwetara netwọk ọrụ. Dị ka ihe dị iche iche approximation njirisi, dị iche iche ọrụ netwọk nwere ike nweta, na dị iche iche nke nzacha nwere ike na-aghọta. (a) Ọ bụ njirimara nke nzacha dị ala na-enweta site na njupụta njupụta nke flattest (bertowitz approximation); Ihe ngafe ahụ bụ nke kacha dị larịị nso ugboro efu, na attenuation na-abawanye n'otu ntabi anya mgbe ọ na-abịaru nso eriri nkwụsị. (c) Ọ bụ njirimara nke nzacha dị ala na-enweta site na nha nha nha anya (Chebyshev approximation); Attenuation na pasband na-agbanwe n'etiti efu na oke elu, ma na-abawanye monotonically na eriri nkwụsị. (e) Ọ na-eji elliptik ọrụ approximation ịghọta àgwà nke ala-agafe nzacha, na attenuation na-egosi mgbe nile voltaji mgbanwe ma ngafe band na kwụsị band. (g) Ọ bụ njirimara nke nzacha dị ala gafere site na; Attenuation na passband na-agbanwe n'ogo nha nha, na nkwụsịtụ na nkwụsịtụ na-agbanwe dịka ịrị elu na ọdịda chọrọ site na index. (b) , (d), (f) na (H) bụ sekit kwekọrọ na nzacha ndị a dị ala n'otu n'otu.
A na-enwetakarị ihe nzacha ngafe dị elu, band-pass na band stop filter site na ngbanwe ugboro ugboro.
Emebere ihe nzacha ihe na-arụ ọrụ site na usoro njikọ n'ụzọ ziri ezi dabere na ihe ndị na-egosi teknụzụ, ma nwee ike nweta sekit nzacha nwere arụmọrụ na akụ na ụba dị mma,
Ihe nzacha LC dị mfe ime, ọnụ ahịa dị ala, obosara na bandwit, yana n'ọtụtụ ebe na nkwukọrịta, akụrụngwa na mpaghara ndị ọzọ; N'otu oge ahụ, a na-ejikarị ya eme ihe dị ka ụdị nhazi nke ọtụtụ ụdị nzacha ndị ọzọ.
Anyị nwekwara ike hazie rf pasive components dị ka ihe ị chọrọ. Ị nwere ike itinye ibe nhazi iji nye nkọwapụta nke ịchọrọ.
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Oge nzipu: Jun-06-2022
