Izindaba

Isihlungi esingasebenzi, eyaziwa nangokuthi isihlungi se-LC, iyisekethe yesihlungi esakhiwe yi-inductance, i-capacitance kanye nokumelana, okungahlunga i-harmonics eyodwa noma ngaphezulu. Isakhiwo sesihlungi esivamile nesilula ukusisebenzisa ukuxhuma i-inductance kanye ne-capacitance ochungechungeni, okungakha i-bypass ye-impedance ephansi yama-harmonics ayinhloko (3, 5 kanye no-7); Isihlungi esilungisiwe esisodwa, isihlungi esilungisiwe kabili kanye nesihlungi se-high pass konke kuyizihlungi ezingasebenzi.
inzuzo
Isihlungi esingasebenzi sinezinzuzo zesakhiwo esilula, izindleko eziphansi, ukuthembeka okuphezulu kokusebenza kanye nezindleko eziphansi zokusebenza. Sisasetshenziswa kabanzi njengendlela yokulawula ehambisanayo.
ukuhlukaniswa
Izici zesihlungi se-LC kufanele zihlangabezane nezidingo zenkomba yobuchwepheshe ezicacisiwe. Lezi zidingo zobuchwepheshe zivame ukusebenza ngokunciphisa isizinda semvamisa, noma ukushintsha kwesigaba, noma kokubili; Ngezinye izikhathi, izidingo zempendulo yesikhathi esizindeni sesikhathi ziyaphakanyiswa. Izihlungi ezingasebenzi zingahlukaniswa ngezigaba ezimbili: izihlungi ezilungisiwe kanye nezihlungi ezidlula kakhulu. Ngesikhathi esifanayo, ngokwezindlela ezahlukene zokuklama, zingahlukaniswa zibe isihlungi sepharamitha yesithombe kanye nesihlungi sepharamitha esisebenzayo.
Isihlungi sokulungisa
Isihlungi sokulungisa sihlanganisa isihlungi sokulungisa esisodwa kanye nesihlungi sokulungisa okuphindwe kabili, esingahlunga i-harmonics eyodwa (yokulungisa okukodwa) noma ezimbili (zokulungisa okuphindwe kabili). Imvamisa yama-harmonics ibizwa ngokuthi imvamisa ye-resonant yesihlungi sokulungisa.
Isihlungi se-High Pass
Isihlungi se-high pass, esaziwa nangokuthi isihlungi sokunciphisa i-amplitude, sihlanganisa kakhulu isihlungi se-high pass sokuqala, isihlungi se-high pass sesibili, isihlungi se-high pass sesithathu kanye nesihlungi se-C-type, ezisetshenziselwa ukunciphisa kakhulu ama-harmonics aphansi kunemvamisa ethile, ebizwa ngokuthi imvamisa yokusika yesihlungi se-high pass.
Isihlungi sepharamitha yesithombe
Isihlungi sakhiwe futhi sasetshenziswa ngokusekelwe kumbono wamapharamitha esithombe. Lesi sihlungi sakhiwe ngezigaba eziningana eziyisisekelo (noma izingxenye eziyingxenye) ezihlukaniswe ngokwesimiso sokumelana kwesithombe okulinganayo ekuxhumekeni. Ingxenye eyisisekelo ingahlukaniswa ngohlobo lwe-K oluhleliwe kanye nohlobo oluvela ku-m ngokwesakhiwo sesekethe. Uma sithatha isihlungi se-LC low-pass njengesibonelo, ukuncishiswa kwebhendi yokuma kwesigaba se-K low-pass esihleliwe kuyanda ngokunye ngokwanda kwemvamisa; I-node ye-low-pass esuselwa ku-m esuselwa ku-m ine-attenuation peak ku-frequency ethile ku-stopband, futhi indawo ye-attenuation peak ilawulwa yi-m value ku-node esuselwa ku-m. Kwesihlungi se-low-pass esakhiwe ngezigaba eziyisisekelo ze-Cascaded Low-Pass, ukuncishiswa okungokwemvelo kulingana nesamba sokuncishiswa okungokwemvelo kwesigaba ngasinye esiyisisekelo. Uma i-impedance yangaphakathi kanye ne-load impedance yokunikezwa kwamandla okuqediwe kuzo zombili iziphetho zesihlungi ilingana ne-impedance yesithombe kuzo zombili iziphetho, i-attenuation esebenzayo kanye ne-phase shift yesihlungi ilingana ne-attenuation yazo engokwemvelo kanye ne-phase shift ngokulandelana. (a) Isihlungi esibonisiwe sakhiwe ngesigaba se-K esihleliwe kanye nezingxenye ezimbili ezithathwe ku-m ku-cascade. I-Z π kanye ne-Z π m ziyi-impedance yesithombe. (b) Ingabe i-attenuation frequency yayo iyisici se-attenuation frequency. Izikhundla zeziqongo ezimbili ze-attenuation /f ∞ 1 kanye ne-f ∞ 2 ku-stopband zinqunywa ngokulandelana ngamanani e-m ama-node amabili athathwe ku-m.
Ngokufanayo, izihlungi ze-high pass, i-band-pass kanye ne-band stop nazo zingakhiwa izingxenye eziyisisekelo ezihambisanayo.
Ukuvimba kwesithombe kwesihlungi akunakulingana nokumelana kwangaphakathi okumsulwa kokumelana kokunikezwa kwamandla kanye nokuvimba komthwalo kuyo yonke ibhendi yemvamisa (umehluko mkhulu kubhendi yokuma), futhi ukuncipha okungokwemvelo kanye nokuncipha kokusebenza kuhluke kakhulu kubhendi yokudlula. Ukuze kuqinisekiswe ukugcwaliseka kwezinkomba zobuchwepheshe, ngokuvamile kuyadingeka ukugcina imajini yokunciphisa okungokwemvelo eyanele futhi kwandiswe ububanzi bebhendi yokudlula ekwakhiweni.
Isihlungi sepharamitha yokusebenza
Lesi sihlungi asikhiwanga ngezigaba eziyisisekelo ezihlanganisiwe, kodwa sisebenzisa imisebenzi yenethiwekhi engabonakala ngokoqobo yi-R, l, C kanye nezinto zokungenisa ezihambisanayo ukuze kulinganiswe ngokunembile imininingwane yobuchwepheshe yesihlungi, bese sibona isekethe yesihlungi ehambisanayo ngemisebenzi yenethiwekhi etholiwe. Ngokwezindlela ezahlukene zokulinganisa, imisebenzi yenethiwekhi ehlukene ingatholakala, futhi izinhlobo ezahlukene zezihlungi zingabonakala. (a) Siyisici sesihlungi esidlula kancane esibonwa yi-flattest amplitude approximation (bertowitz approximation); I-passband iyimvamisa ephansi kakhulu eseduze ne-zero, futhi ukunciphisa kuyanda ngokunye lapho isondela ku-stopband. (c) Siyisici sesihlungi esidlula kancane esibonwa yi-equal ripple approximation (Chebyshev approximation); Ukuncipha ku-passband kuyashintshashintsha phakathi kuka-zero nomkhawulo ongaphezulu, futhi kuyanda ngokunye ku-stopband. (e) Sisebenzisa ukulinganisa komsebenzi we-elliptic ukuze sibone izici zesihlungi esidlula kancane, futhi ukunciphisa kuveza ushintsho oluqhubekayo lwe-voltage kokubili ku-pass band kanye ne-stop band. (g) Ingabe isici sesihlungi esidlula kancane esibonwa yi; Ukuncishiswa kwe-passband kuyashintshashintsha ngobungako obulinganayo, kanti ukuncishiswa kwe-stopband kuyashintshashintsha ngokuya ngokukhuphuka nokuwa okudingwa yinkomba. (b) , (d), (f) kanye no-(H) yizifunda ezihambisanayo zalezi zihlungi ezidlula kancane ngokulandelana.
Izihlungi ze-High pass, i-band-pass kanye ne-band stop zivame ukutholakala kuzihlungi ze-low pass ngokusebenzisa ukuguqulwa kwemvamisa.
Isihlungi sepharamitha esisebenzayo sakhiwe ngendlela yokuhlanganisa ngokunembile ngokwezidingo zezinkomba zobuchwepheshe, futhi singathola isekethe yesihlungi esisebenza kahle kakhulu futhi esinomnotho,
Isihlungi se-LC kulula ukusenza, siphansi ngentengo, sibanzi ngebhendi yemvamisa, futhi sisetshenziswa kabanzi kwezokuxhumana, emishinini nakwezinye izinkambu; Ngesikhathi esifanayo, sivame ukusetshenziswa njengesibonelo sokuklama sezinye izinhlobo eziningi zezihlungi.

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