Zosefera zopanda pake, yomwe imadziwikanso kuti LC fyuluta, ndi fyuluta yozungulira yopangidwa ndi inductance, capacitance ndi kukana, yomwe imatha kusefa imodzi kapena zingapo za harmonics. Chodziwika bwino komanso chosavuta kugwiritsa ntchito mawonekedwe a fyuluta ndikulumikiza inductance ndi capacitance mndandanda, zomwe zimatha kupanga njira yochepetsera yolumikizira ma harmonics akulu (3, 5 ndi 7); Zosefera zosinthidwa kamodzi, zosefera zochunidwa pawiri ndi zosefera zapamwamba zonse ndi zosefera.
mwayi
Zosefera za Passive zili ndi zabwino zamapangidwe osavuta, otsika mtengo, kudalirika kwa magwiridwe antchito komanso mtengo wotsika mtengo. Imagwiritsidwabe ntchito kwambiri ngati njira yowongolera ma harmonic.
gulu
Makhalidwe a LC fyuluta adzakwaniritsa zofunikira zaukadaulo zomwe zafotokozedwa. Zofunikira zaukadaulo izi nthawi zambiri zimagwira ntchito yochepetsetsa pafupipafupi, kapena kusintha magawo, kapena zonse ziwiri; Nthawi zina, zofunikira pakuyankhidwa kwa nthawi mu domeni yanthawi zimaperekedwa. Zosefera zopanda pake zitha kugawidwa m'magulu awiri: zosefera zosinthidwa ndi zosefera zapamwamba. Pa nthawi yomweyo, malinga ndi njira zosiyanasiyana kamangidwe, akhoza kugawidwa mu fano chizindikiro chizindikiro ndi ntchito chizindikiro fyuluta.
Kukonza fyuluta
Chosefera chosinthira chimakhala ndi sefa imodzi yosinthira ndi zosefera ziwiri, zomwe zimatha kusefa imodzi (kukonza kumodzi) kapena ziwiri (kukonza kawiri) zolumikizana. Mafupipafupi a ma harmonics amatchedwa ma frequency a resonant a fyuluta yosinthira.
High pass fyuluta
High pass fyuluta, yomwe imadziwikanso kuti fyuluta yochepetsera matalikidwe, makamaka imaphatikizapo fyuluta yoyamba yopita kumtunda, fyuluta yachiwiri yapamwamba, fyuluta yachitatu yapamwamba ndi C-mtundu fyuluta, zomwe zimagwiritsidwa ntchito kuti zichepetse ma harmonics otsika kusiyana ndi mafupipafupi, omwe amatchedwa kudulidwa kwafupipafupi kwa fyuluta yapamwamba.
Zosefera zazithunzi
Fyulutayo idapangidwa ndikukhazikitsidwa motengera chiphunzitso cha magawo azithunzi. Fyulutayi ili ndi magawo angapo oyambira (kapena theka) otsatiridwa molingana ndi mfundo yofananira yofananira pa intaneti. Gawo loyambira litha kugawidwa m'mitundu yokhazikika ya K ndi yochokera ku m molingana ndi kapangidwe ka dera. Kutengera mwachitsanzo fyuluta yotsika pang'ono ya LC, kuyimitsidwa kwa gawo lokhazikika la K-pass-pass Basic kumawonjezeka molunjika ndikuwonjezeka pafupipafupi; M-derived low-pass basic node imakhala ndi nsonga yochepetsera pafupipafupi pamayendedwe oyimitsa, ndipo malo omwe ali pachiwopsezo amawongoleredwa ndi mtengo wa m mu node yotengedwa ndi m. Pazosefera zotsika pang'ono zopangidwa ndi zigawo zoyambira za Cascaded Low-Pass, kuchepetsedwa kwachibadwidwe ndikofanana ndi kuchuluka kwa kuchepetsedwa kwa gawo lililonse. Pamene Impedans mkati ndi katundu Impedans wa magetsi anathetsedwa pa malekezero onse a fyuluta ali ofanana ndi chithunzi impedance pa malekezero onse, attenuation ntchito ndi kusintha gawo fyuluta ndi ofanana ndi chibadidwe attenuation ndi gawo kusintha motero. (a) Zosefera zomwe zawonetsedwa zapangidwa ndi gawo la K lokhazikika ndi magawo awiri otengedwa m'mitsinje. Z π ndi Z π m ndi zolepheretsa zithunzi. (b) Ndi mawonekedwe ake ochepetsetsa. Malo a nsonga ziwiri zochepetsera / f ∞ 1 ndi f ∞ 2 mu stopband zimatsimikiziridwa ndi ma values a ma node awiri otengedwa m.
Momwemonso, zosefera za pass high, band-pass ndi band stop zithanso kupangidwa ndi zigawo zofananira.
Kulepheretsa kwazithunzi za fyuluta sikungafanane ndi kukana koyera kwamkati kwa mphamvu yamagetsi ndi kulepheretsa katundu mu gulu lonse la ma frequency (kusiyana kuli kwakukulu mu stopband), ndipo kuchepetsedwa kwachibadwidwe ndi kuchepa kwa ntchito ndizosiyana kwambiri ndi passband. Pofuna kuwonetsetsa kuti zizindikiro zaukadaulo zikwaniritsidwa, nthawi zambiri pamafunika kusungitsa malire ocheperako ndikuwonjezera m'lifupi mwake pamapangidwewo.
Zosefera zogwiritsa ntchito
Zoseferazi sizimapangidwa ndi magawo oyambira, koma zimagwiritsa ntchito maukonde omwe amatha kuzindikirika ndi R, l, C ndi zinthu zomwe zimayenderana kuti zifananize bwino zaukadaulo wazosefera, kenako ndikuzindikira mawonekedwe ofananirako ndi ma network omwe adapeza. Malinga ndi njira zofananira zosiyanasiyana, ntchito zosiyanasiyana zapaintaneti zitha kupezeka, ndipo zosefera zamitundu yosiyanasiyana zimatha kuchitika. (a) Ndilo mawonekedwe a fyuluta yotsika pang'ono yomwe imazindikiridwa ndi kuyerekezera kwa matalikidwe a flattest (pafupifupi bertowitz); Passband ndiyomwe imakhala yosalala kwambiri pafupi ndi zero pafupipafupi, ndipo kutsika kumawonjezeka mokhazikika ikayandikira kuyimitsidwa. (c) Kodi mawonekedwe a fyuluta yotsika pang'ono imazindikiridwa ndi kuyerekezera kofanana (Chebyshev pafupifupi); Kutsika kwa passband kumasinthasintha pakati pa ziro ndi malire apamwamba, ndipo kumawonjezeka mopanda malire mu stopband. (e) Imagwiritsa ntchito kuyerekezera kwa elliptic kuti izindikire mawonekedwe a zosefera zotsika, ndipo kutsitsako kumapereka kusintha kwamagetsi kosalekeza mu band yodutsa ndi mabandi oyimitsa. (g) Kodi mawonekedwe a sefa yotsika pang'ono amazindikiridwa ndi; The attenuation mu passband amasinthasintha mofanana matalikidwe, ndi attenuation mu stopband kusinthasintha malinga ndi kukwera ndi kugwa chofunika ndi index. (b) , (d), (f) ndi (H) ndi zozungulira zofananira za zosefera zotsika motsatana.
Zosefera zodutsa kwambiri, band-pass ndi band stop nthawi zambiri zimachokera ku zosefera zotsika pang'ono posintha pafupipafupi.
Fyuluta yogwira ntchito imapangidwa ndi njira yophatikizira molondola malinga ndi zofunikira zaumisiri, ndipo imatha kupeza chigawo cha fyuluta ndikuchita bwino komanso chuma,
LC fyuluta ndiyosavuta kupanga, yotsika mtengo, yotakata pafupipafupi, ndipo imagwiritsidwa ntchito kwambiri polumikizirana, zida ndi zina; Nthawi yomweyo, nthawi zambiri amagwiritsidwa ntchito ngati mawonekedwe amitundu yambiri yazosefera.
Titha kusinthanso magawo a rf passive malinga ndi zomwe mukufuna. Mutha kulowa patsamba losintha kuti mupereke zomwe mukufuna.
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Nthawi yotumiza: Jun-06-2022
