Mafirita ePassive Band Passinogona kugadzirwa nekubatanidza firita ine simba shoma nefirita ine simba guru
Firita rePassive Band Pass rinogona kushandiswa kuparadzanisa kana kusefa mamwe mafrequency ari mukati mebhendi rakati kana huwandu hwemafrequencies. Frequency yekucheka kana ƒc point mu RC passive filter iri nyore inogona kudzorwa nemazvo uchishandisa resistor imwe chete mumutsara ine capacitor isina polarized, uye zvichienderana nekuti yakabatana sei, taona kuti firita reLow Pass kana High Pass rinotorwa.
Imwe nzira iri nyore yekushandisa ma "passive filters" aya ndeyekushandisa ma "audio amplifier applications" kana ma "circuits" akadai se "loudspeaker crossover filters" kana kuti "pre-amplifier tone controls". Dzimwe nguva zvinodikanwa kungopfuura mamwe ma "frequencies" asingatangi pa0Hz, (DC) kana kupera pane imwe nzvimbo yepamusoro ye "high frequency point" asi ari mukati me "range" kana "band of frequencies", ingave yakamanikana kana yakafara.
Nekubatanidza kana "kuburitsa" pamwe chete dunhu rimwe chete reLow Pass Filter nedunhu reHigh Pass Filter, tinogona kugadzira rumwe rudzi rwesefa reRC risingashande rinopfuudza range yakasarudzwa kana "band" yemafrequencies anogona kunge akamanikana kana akafara uku achideredza ese ari kunze kwerange iyi. Rudzi rutsva urwu rwesefa risingashande rinoburitsa sefa rinosarudza frequency rinozivikanwa seBand Pass Filter kana kuti BPF muchidimbu.
Kusiyana nefirita repasi diki rinongoburitsa masaini enzvimbo yakaderera kana firita repasi diki rinoburitsa masaini enzvimbo yakakwirira, maFilter eBand Pass anoburitsa masaini mukati me "band" kana "spread" yemafrequencies pasina kukanganisa chiratidzo chekupinda kana kuunza ruzha rwakawedzerwa. Iri bhendi remafrequencies rinogona kuva chero upamhi uye rinozivikanwa semafirita eBandwidth.
Bandwidth inowanzotsanangurwa sehuwandu hwema frequency huripo pakati pema frequency cut-off points maviri (ƒc), ari 3dB pasi pe maximum centre kana resonant peak ukuwo zvichideredza kana kushayisa simba mamwe ari kunze kwema points maviri aya.
Zvadaro, pamafrequencies akapararira zvakanyanya, tinogona kungotsanangura izwi rekuti "bandwidth", BW semusiyano uripo pakati pemafrequencies ekudzikisa (ƒcLOWER) uye mafrequencies ekudzikisa (ƒcHIGHER). Nemamwe mashoko, BW = ƒH – ƒL. Zviri pachena kuti pass band filter ishande nemazvo, cut-off frequency ye low pass filter inofanira kunge yakakwira kupfuura cut-off frequency ye high pass filter.
Firita yeBand Pass "yakanaka" inogona kushandiswawo kuparadzanisa kana kusefa mamwe mafrequency ari mukati mebhendi rakati remafrequencies, semuenzaniso, kudzima ruzha. Mafirita eband pass anozivikanwa semafirita echipiri, (two-pole) nekuti ane "two" reactive component, ma capacitors, mukati mekugadzirwa kwecircuit yavo. Capacitor imwe iri mu low pass circuit uye imwe capacitor iri mu high pass circuit.
Bode Plot kana kuti frequency response curve iri pamusoro inoratidza hunhu hwebhendi pass filter. Pano chiratidzo chinodzikira pamafrequencies akaderera nekubuda kuchiwedzera pamutsetse we +20dB/Decade (6dB/Octave) kusvika frequency yasvika pa "lower cut-off" point ƒL. Pafrequency iyi voltage yekubuda iri zvakare 1/√2 = 70.7% ye input signal value kana -3dB (20*log(VOUT/VIN)) ye input.
Kubuda kunoramba kuri pakuwedzera kukuru kusvika kwasvika pa "upper cut-off" point ƒH apo kubuda kunodzikira pachiyero che -20dB/Decade (6dB/Octave) zvichideredza chero masaini e high frequency. Poindi yekuwedzera kukuru kwekubudisa kazhinji igeometric mean ye two -3dB value pakati pe lower ne upper cut-off points uye inonzi "Centre Frequency" kana "Resonant Peak" value ƒr. Iyi geometric mean value inoverengwa se ƒr 2 = ƒ(UPPER) x ƒ(LOWER).
Abhendi pass firitainoonekwa sefirita remhando yechipiri (two-pole) nekuti ine "two" reactive components mukati me circuit structure yayo, saka phase angle ichave yakapetwa kaviri pane ma filters ekutanga akaonekwa kare, kureva, 180o. Phase angle ye output signal INOTONGA ye input ne +90o kusvika pakati kana resonant frequency, ƒr point kana yava "zero" degrees (0o) kana "in-phase" uye yozochinja kuita LAG input ne -90o sezvo output frequency ichiwedzera.
Mapoinzi ekucheka epamusoro nepazasi e "band pass filter" anogona kuwanikwa uchishandisa fomura imwecheteyo neye "low pass filters" ne "high pass filters", Semuenzaniso.
Zvishandiso zvinouya zvakajairwa zvine zvibatiso zvechikadzi zveSMA kana N, kana kuti zvibatiso zve 2.92mm, 2.40mm, uye 1.85mm zvezvikamu zve high frequency.
Tinogonawo kugadzirisa Band Pass Filter zvichienderana nezvamunoda. Munogona kupinda papeji rekugadzirisa kuti mupe zvinodiwa zvamunoda.
Nguva yekutumira: Gunyana-06-2022
