Iindaba

Isihluzi esingasebenziyo, eyaziwa ngokuba yi-LC filter, yisekethe yesihluzo eyenziwe yi-inductance, i-capacitance kunye ne-resistance, enokucoca i-harmonics enye okanye ezingaphezulu. Eyona ndlela iqhelekileyo nelula ukuyisebenzisa kukudibanisa i-inductance kunye ne-capacitance kuthotho, enokwenza i-low impedance bypass kwi-harmonics eziphambili (3, 5 kunye ne-7); Isihluzo esilungisiweyo esinye, isihluzo esilungisiweyo kabini kunye nesihluzo esidlula phezulu zonke zizihluzo ezingasebenziyo.
inzuzo
Isihluzi esingasebenziyo sineengenelo zesakhiwo esilula, ixabiso eliphantsi, ukuthembeka okuphezulu kokusebenza kunye nexabiso eliphantsi lokusebenza. Sisasetyenziswa kakhulu njengendlela yokulawula i-harmonic.
ukuhlelwa
Iimpawu zesihluzo se-LC kufuneka zihlangabezane neemfuno zesalathisi sobugcisa ezichaziweyo. Ezi mfuno zobugcisa zihlala zisebenza ngokunciphisa i-frequency domain, okanye i-phase shift, okanye zombini; Ngamanye amaxesha, iimfuno zempendulo yexesha kwi-time domain ziyacetyiswa. Izihluzo ezingasebenziyo zinokwahlulwa zibe ziindidi ezimbini: izihluzo ezilungisiweyo kunye nezihluzo ezidlulayo. Kwangaxeshanye, ngokweendlela ezahlukeneyo zoyilo, zinokwahlulwa zibe sisihluzo separameter yomfanekiso kunye nesihluzo separameter esisebenzayo.
Isihluzi sokulungisa
Isihluzo sokulungisa siquka isihluzo sokulungisa esinye kunye nesihluzo sokulungisa kabini, esinokuhluza i-harmonics enye (yokulungisa enye) okanye ezimbini (zokulungisa kabini). Ukuphindaphinda kwee-harmonics kubizwa ngokuba yi-resonant frequency yesihluzo sokulungisa.
Isihluzi esiphakamileyo
Isihluzi se-high pass, esaziwa ngokuba sisihluzi sokunciphisa i-amplitude, ikakhulu siquka isihluzi se-high pass sokuqala, isihluzi se-high pass sesibini, isihluzi se-high pass sesithathu kunye nesihluzi se-C-type, ezisetyenziselwa ukunciphisa kakhulu i-harmonics engaphantsi kune-frequency ethile, ebizwa ngokuba yi-cut-off frequency yesihluzi se-high pass.
Isihluzi sepharamitha yomfanekiso
Isihluzo siyilwe kwaye sisetyenziswa ngokusekelwe kwithiyori yeeparamitha zomfanekiso. Esi sihluzo senziwe ngamacandelo aliqela asisiseko (okanye amacandelo asiqingatha) aqukunjelwe ngokomgaqo wokumelana komfanekiso olinganayo kuqhagamshelo. Icandelo elisisiseko linokwahlulwahlulwa libe yi-fixed K-type kunye ne-m-derived type ngokwesakhiwo sesekethe. Xa kuthathwa isihluzo se-LC low-pass njengomzekelo, ukuncitshiswa kwebhendi yokumisa kwecandelo elisisiseko le-fixed K-type low-pass basis kuyanda ngokuphindaphindiweyo ngokwanda kwemvamisa; I-m-derived low-pass basis node inencochoyi yokuncitshiswa kwimvamisa ethile kwi-stopband, kwaye indawo yencochoyi yokuncitshiswa ilawulwa lixabiso le-m kwi-node efunyenwe yi-m. Kwisihluzo se-low-pass esenziwe ngamacandelo asisiseko e-Cascaded Low-Pass, ukuncitshiswa kwe-inherent kufana nesimbuku se-inherent attenuation yecandelo ngalinye elisisiseko. Xa i-impedance yangaphakathi kunye ne-load impedance yombane epheliswe kuzo zombini iziphelo zesihluzo ilingana ne-image impedance kuzo zombini iziphelo, i-working attenuation kunye ne-phase shift yesihluzo ilingana ne-inherent attenuation kunye ne-phase shift yazo ngokulandelelana. (a) Isihluzo esibonisiweyo senziwe ngecandelo le-K elisisigxina kunye namacandelo amabini afunyenwe kwi-m kwi-cascade. I-Z π kunye ne-Z π m ziyi-image impedance. (b) Ingaba i-attenuation frequency yayo iphawuleka. Iindawo zeencopho ezimbini ze-attenuation /f ∞ 1 kunye ne-f ∞ 2 kwi-stopband zimiselwa ngokwahlukeneyo ngamaxabiso e-m ee-nodes ezimbini ezifunyenwe kwi-m.
Ngokufanayo, izihluzi ze-high pass, i-band-pass kunye ne-band stop nazo zinokwenziwa ngamacandelo asisiseko ahambelanayo.
Ukuthintela komfanekiso kwesihluzi akunakulingana nokumelana okumsulwa kwangaphakathi kombane kunye nokuthintela komthwalo kwibhendi yonke yefrikhwensi (umahluko mkhulu kwibhendi yokumisa), kwaye ukuncipha okungokwemvelo kunye nokunciphisa okusebenzayo kwahlukile kakhulu kwibhendi yokugqitha. Ukuze kuqinisekiswe ukufezekiswa kwezalathisi zobugcisa, kudla ngokuba yimfuneko ukugcina umda owaneleyo wokunciphisa okungokwemvelo kunye nokwandisa ububanzi bebhendi yokugqitha kuyilo.
Isihluzi sepharamitha yokusebenza
Esi sihluzo asiqulathwanga ngamacandelo asisiseko aqulunqwe nge-cascaded, kodwa sisebenzisa imisebenzi yenethiwekhi enokuqatshelwa ngokwasemzimbeni yi-R, l, C kunye nezinto ze-inductance ezidibeneyo ukuze kuqikelelwe ngokuchanekileyo iinkcukacha zobugcisa zesihluzo, size emva koko siqaphele isekethe yesihluzo ehambelanayo ngemisebenzi yenethiwekhi efunyenweyo. Ngokweekhrayitheriya ezahlukeneyo zokulinganisa, imisebenzi eyahlukeneyo yenethiwekhi inokufumaneka, kwaye iintlobo ezahlukeneyo zezihluzo zinokuqatshelwa. (a) Luphawu lwesihluzo esiphantsi esiqatshelwa yi-flattest amplitude approximation (bertowitz approximation); I-passband yeyona ithambileyo kakhulu kufutshane ne-zero frequency, kwaye i-attenuation iyanda ngokungaqhelekanga xa isondela kwi-stopband. (c) Luphawu lwesihluzo esiphantsi esiqatshelwa yi-equal ripple approximation (Chebyshev approximation); I-attenuation kwi-passband iyatshintshatshintsha phakathi kwe-zero kunye nomda ophezulu, kwaye iyanda ngokungaqhelekanga kwi-stopband. (e) Isebenzisa i-elliptic function approximation ukuze iqonde iimpawu zesihluzo esiphantsi, kwaye i-attenuation inika utshintsho oluqhubekayo lwe-voltage kuzo zombini i-pass band kunye ne-stop band. (g) Ngaba luphawu lwesihluzi esiphantsi esibonakaliswa yi; Ukuncitshiswa kwi-passband kuyatshintshatshintsha ngokulinganayo, kwaye ukuncitshiswa kwi-stopband kuyatshintshatshintsha ngokwenyuka nokuwa okufunekayo yi-index. (b) , (d), (f) kunye no-(H) ziisekethe ezihambelanayo zezi zihluzi eziphantsi ngokwahlukeneyo.
Izihluzi ze-High pass, i-band-pass kunye ne-band stop zihlala zifunyanwa kwizihluzi ze-low-pass ngokusebenzisa utshintsho lwe-frequency.
Isihluzi separameter esisebenzayo siyilwe ngendlela yokwenza izinto ngokuchanekileyo ngokweemfuno zezalathisi zobugcisa, kwaye sinokufumana isekethe yesihluzi esisebenza kakuhle kwaye sinoqoqosho oluphezulu,
Isihluzi se-LC kulula ukusenza, sixabiso liphantsi, sibanzi kwibhendi yamaza, kwaye sisetyenziswa kakhulu kunxibelelwano, kwizixhobo nakwezinye iindawo; Kwangaxeshanye, sisetyenziswa rhoqo njengomzekelo woyilo lwezinye iintlobo ezininzi zezihluzi.

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