Isihlungi se-passive, eyaziwa nangokuthi isihlungi se-LC, isifunda sokuhlunga esakhiwe i-inductance, capacitance kanye nokumelana, esingasefa i-harmonics eyodwa noma ngaphezulu. Isakhiwo sokuhlunga esivame kakhulu nesisebenziseka kalula ukuxhuma i-inductance kanye ne-capacitance ochungechungeni, olungakha i-impedance bypass ephansi yama-harmonics ayinhloko (3, 5 kanye ne-7); Isihlungi esishuniwe esisodwa, isihlungi esishunwe kabili nesihlungi sokudlula okuphezulu konke kuyizihlungi ezingenzi lutho.
inzuzo
Isihlungi se-Passive sinezinzuzo zesakhiwo esilula, izindleko eziphansi, ukuthembeka okuphezulu kokusebenza kanye nezindleko eziphansi zokusebenza. Isasetshenziswa kabanzi njengendlela yokulawula i-harmonic.
ukuhlukaniswa
Izici zesihlungi se-LC zizohlangabezana nezidingo zenkomba yobuchwepheshe eshiwo. Lezi zidingo zobuchwepheshe ngokuvamile zisebenza ukuncishiswa kwesizinda samafrikhwensi, noma ukushintsha kwesigaba, noma kokubili; Kwesinye isikhathi, izidingo zokuphendula zesikhathi esizindeni sesikhathi ziyaphakanyiswa. Izihlungi ezingenzi lutho zingahlukaniswa zibe izigaba ezimbili: izihlungi ezishuniwe nezihlungi zokudlula okuphezulu. Ngesikhathi esifanayo, ngokwezindlela ezahlukene zokuklama, ingahlukaniswa ngesihlungi sepharamitha yesithombe kanye nesihlungi sepharamitha esebenzayo.
Ukushuna isihlungi
Isihlungi sokushuna sihlanganisa isihlungi sokushuna esisodwa kanye nesihlungi sokushuna esikabili, esingahlunga okukodwa (ukushuna okukodwa) noma okubili (ukushuna okukabili) ama-harmonics. Imvamisa yama-harmonics ibizwa ngokuthi i-resonant frequency yesihlungi sokulungisa.
Isihlungi sokudlula okuphezulu
Isihlungi se-high pass, esaziwa nangokuthi isihlungi sokunciphisa i-amplitude, ikakhulukazi sihlanganisa isihlungi sokudlula esiphezulu sokuqala, isihlungi se-high pass ye-oda lesibili, isihlungi se-high pass ye-oda lesithathu nesihlungi sohlobo lwe-C, esisetshenziselwa ukunciphisa kakhulu ama-harmonics aphansi kunemvamisa ethile, okubizwa ngokuthi i-cut-off frequency yesihlungi sokudlula okuphezulu.
Isihlungi sepharamitha yesithombe
Isihlungi siklanywe futhi sisetshenziswe ngokusekelwe kumbono wemingcele yesithombe. Lesi sihlungi sakhiwe izigaba ezimbalwa eziyisisekelo (noma izigaba eziyingxenye) ezikhishwe ngokuvumelana nesimiso sokungaphumeleli kwesithombe esilinganayo ekuxhumekeni. Isigaba esiyisisekelo singahlukaniswa ngohlobo lwe-K olungaguquki kanye nohlobo olususelwa ku-m ngokuya ngesakhiwo sesifunda. Ukuthatha isihlungi se-LC low-pass njengesibonelo, ukuncishiswa kwe-stopband yesigaba esiyisisekelo se-low-pass egxilile yohlobo lwe-K kukhula ngokulinganayo ngokwanda kwemvamisa; I-node eyisisekelo yephasi eliphansi elisuselwa ku-m inenani eliphakeme lokunciphisa imvamisa ethile kubhande lokumisa, futhi indawo yokuphakama kwe-attenuation ilawulwa inani elingu-m endaweni etholakala ku-m. Ukuze uthole isihlungi sephasi eliphansi esakhiwe izigaba eziyisisekelo ze-Cascaded Low-Pass, ukuncishiswa okungokwemvelo kulingana nesamba sokuncishwa kwemvelo kwesigaba ngasinye esiyisisekelo. Uma ukuthikamezeka kwangaphakathi nokubambezeleka komthwalo wokunikezwa kwamandla kunqanyulwe kuzo zombili iziphetho zesihlungi zilingana nokubambezeleka kwesithombe kuzo zombili iziphetho, ukuncipha kokusebenza kanye nokushintshwa kwesigaba sesihlungi kuyalingana nokuncishana kwakho okungokwemvelo kanye nokushintsha kwesigaba ngokulandelanayo. (a) Isihlungi esibonisiwe sakhiwe ingxenye engu-K engashintshi kanye nezigaba ezitholwe ku-m ezimbili ku-cascade. U-Z π kanye no-Z π m yi-impedance yesithombe. (b) Ingabe imvamisa yokuncipha kwayo iwuphawu. Ukuma kweziqongo ezimbili zokunciphisa u-/f ∞ 1 kanye no-f ∞ 2 kubhande lokumisa ngokulandelana kunqunywa amanani we-m wamanodi atholwe ku-m amabili.
Ngokufanayo, izihlungi zokudlula okuphezulu, i-band-pass kanye ne-band stop nazo zingakhiwa izingxenye eziyisisekelo ezihambisanayo.
I-impedance yesithombe yesihlungi ayikwazi ukulingana nokumelana okuhlanzekile kwangaphakathi okuphikisayo kokunikezwa kwamandla kanye nokuvinjelwa komthwalo kuyo yonke ibhendi yefrikhwensi (umehluko mkhulu ku-stopband), futhi ukuncishiswa kwemvelo kanye nokunciphisa ukusebenza kuhluke kakhulu ku-passband. Ukuze kuqinisekiswe ukufezeka kwezinkomba zobuchwepheshe, ngokuvamile kuyadingeka ukuba ugcine i-margin eyanele yemvelo futhi ukhuphule ububanzi bebhendi yokungena ekwakhiweni.
Isihlungi sepharamitha esebenzayo
Lesi sihlungi asikhiwanga izigaba eziyisisekelo ze-cascade, kodwa sisebenzisa imisebenzi yenethiwekhi engabonwa ngokoqobo ngu-R, l, C kanye nama-elementi e-mutual inductance ukulinganisa ngokunembile ukucaciswa kobuchwepheshe kwesihlungi, bese sibona isifunda sokuhlunga esihambisanayo ngemisebenzi yenethiwekhi etholiwe. Ngokwemibandela ehlukene yokulinganisa, imisebenzi ehlukene yenethiwekhi ingatholwa, futhi izinhlobo ezahlukene zokuhlunga zingenziwa. (a) Kuwuphawu lwesihlungi sephasi eliphansi elitholwa ngokusondela kwe-amplitude flattest (ukulinganisa kwe-bertowitz); Ibhande lokungena liyisicaba kakhulu eliseduze nefrikhwensi enguziro, futhi ukuncipha kukhuphuka kancane uma isondela kubhande lokumisa. (c) Ingabe isici sesihlungi se-low-pass sibonakala ngokulinganisa okulinganayo kwe-ripple (ukulinganisa kwe-Chebyshev); Ukuncipha kubhendi yokudlula kushintshashintsha phakathi kukaziro nomkhawulo ongaphezulu, futhi kukhuphuke ngokulinganayo kubhande lokumisa. (e) Isebenzisa ukulinganisa kokusebenza kwe-elliptic ukuze kubonakale izici zesihlungi se-low-pass, futhi ukuncipha kuveza ukuguqulwa okungaguquki kwamandla kagesi kuwo womabili ibhendi yokudlula nebhendi yokumisa. (g) Ingabe isimilo sesihlungi se-low-pass sibonakala ngokuthi; Ukuncipha kwebhande lokudlula kushintshashintsha ngobude obulinganayo, futhi ukuncipha kubhande lokumisa kuyashintshashintsha ngokuya ngokukhuphuka nokuwa okudingekayo inkomba. (b) , (d), (f) kanye (H) amasekhethi ahambisanayo alezi zihlungi zephasi eliphansi ngokulandelana kwazo.
Izihlungi zokudlula okuphezulu, 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 isifunda sokuhlunga ngokusebenza okuhle kakhulu nomnotho,
Isihlungi se-LC kulula ukwenza, siphansi ngentengo, sibanzi kuma-frequency band, futhi sisetshenziswa kabanzi kwezokuxhumana, izinsimbi kanye neminye imikhakha; Ngesikhathi esifanayo, ngokuvamile isetshenziswa njengesibonelo sokuklama kwezinye izinhlobo eziningi zezihlungi.
Singakwazi futhi ukwenza ngokwezifiso izingxenye ze-rf passive ngokuya ngezidingo zakho. Ungafaka ikhasi lokwenza ngokwezifiso ukuze unikeze imininingwane oyidingayo.
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Isikhathi sokuthumela: Jun-06-2022
