Akwai sigogi da yawa na resistor, yawanci muna damuwa game da ƙimar, daidaito, adadin iko, waɗannan alamomi guda uku sun dace.Gaskiya ne cewa a cikin da'irori na dijital, ba ma buƙatar kula da cikakkun bayanai da yawa, bayan haka, akwai 1 da 0 kawai a cikin dijital, ba ƙididdige tasirin ragi ba.Amma a cikin da'irori na analog, lokacin da muka yi amfani da madaidaicin tushen wutar lantarki, ko jujjuya sigina-zuwa-dijital, ko haɓaka sigina mai rauni, ƙaramin canji a ƙimar juriya zai yi tasiri sosai.A lokacin bugawa tare da resistor, ba shakka, yana cikin lokacin sarrafa siginar analog, kuma daga baya, bisa ga aikace-aikacen da'irar analog don nazarin tasirin kowane siga na resistor.
Adadin juriya na juriya na resistor - yawan adadin juriya na zaɓin resistor sau da yawa ana daidaita shi ta aikace-aikacen, kamar ƙimar fitilar LED na yanzu, ko samfurin siginar na yanzu, ƙimar juriya na resistor m babu sauran zaɓuɓɓuka.Amma a wasu lokatai, akwai zaɓi iri-iri don resistor, kamar haɓaka siginar ƙarfin lantarki, kamar yadda aka nuna a cikin adadi, haɓakawa yana da alaƙa da rabon R2 zuwa R3, kuma ba shi da alaƙa da ƙimar ƙimar. R2 da R3.A wannan lokacin, zaɓin juriya na resistor har yanzu yana dogara ne akan: mafi girman juriya na juriya, mafi girman ƙarar zafi, mafi munin aikin amplifier;ƙananan juriya na resistor, mafi girman aikin shine halin yanzu, mafi girma amo na yanzu, mafi muni da aikin amplifier;Wannan shine dalilin da ya sa yawancin da'irori na haɓakawa ke zama dubun juriya na K, akwai buƙatar yin amfani da ƙimar juriya mai girma, ko amfani da masu bin wutar lantarki, ko amfani da hanyoyin sadarwa na T don gujewa.
Ba Mai Juyawa Amp
Madaidaicin juzu'i - an fahimci ma'auni na resistor, a nan kada ku yi magana.Madaidaicin juriya shine gabaɗaya 1% da 5%, daidaici zuwa 0.1%, da sauransu. Farashin 0.1% shine kusan sau goma fiye da 1%, kuma 1% shine kusan sau 1.3 fiye da 5%.Gabaɗaya, lambar daidaito A = 0.05%, B=0.1%, C=0.25%, D=0.5%, F=1%, G=2%, J=5%, K=10%, M=20%.
Ikon gaban resistor – ikon resistor zai kasance mai sauqi qwarai, amma sau da yawa mai sauƙin amfani da shi ba daidai ba.Alal misali, 2512 guntu resistor, da kewayon ikon ne 1W, bisa ga ƙayyadaddun na resistor, zafin jiki ya wuce 70 digiri Celsius, da resistor ya kamata a rage don amfani.2512 chip resistor a karshen nawa za a iya amfani da wutar lantarki, a dakin da zafin jiki, idan PCB pads ba tare da magani na musamman na zafi ba, 2512 guntu resistor ikon zuwa 0.3W, zafin jiki na iya zama fiye da 100 ko ma 120 digiri Celsius..A cikin ma'aunin ma'aunin Celsius 125, bisa ga yanayin yanayin zafi, adadin ƙarfin 2512 yana buƙatar ragewa zuwa 30%.Wannan halin da ake ciki a cikin kowane juzu'i na kunshin yana buƙatar kula da hankali, kada ku yi imani da ikon da ba a sani ba, matsayi mai mahimmanci shine mafi kyau don dubawa sau biyu don kauce wa barin matsalolin ɓoye.
Resistor jure ƙimar ƙarfin lantarki - resistor jure ƙarfin lantarki gabaɗaya ba a ambace shi ba, musamman ga masu shigowa, galibi suna da ƙarancin ra'ayi, suna tunanin cewa masu ƙarfin ƙarfin ƙarfin ƙarfin lantarki kawai suna jure ƙimar wutar lantarki.Wutar lantarkin da za'a iya amfani da ita a dukkan bangarorin biyu na resistor, daya ana tantance shi da adadin wutar lantarki, don tabbatar da cewa karfin bai wuce adadin wutar ba, daya kuma shine juriya na darajar wutar lantarki.Duk da cewa karfin jikin resistor baya wuce karfin da aka kididdige shi, amma yawan karfin wutar lantarki zai iya haifar da rashin zaman lafiya, rarrafe tsakanin fil din resistor, da sauran kasawa, don haka ya zama dole a zabi resistor mai ma'ana gwargwadon karfin wutar da ake amfani da shi.Wasu daga cikin fakitin jure wa ƙimar ƙarfin lantarki sun haɗa da: 0603 = 50V, 0805 = 100V, 1206 zuwa 2512 = 200V, 1/4W plug-in = 250V.Kuma, aikace-aikacen lokaci, ƙarfin lantarki a kan resistor ya kamata ya zama ƙasa da adadin jurewar ƙimar ƙarfin lantarki fiye da 20%, in ba haka ba yana da sauƙin samun matsaloli bayan dogon lokaci.
Yanayin zafin jiki na juriya - Matsakaicin zafin jiki na juriya shine ma'auni wanda ke bayyana canjin juriya tare da zafin jiki.Wannan an ƙaddara shi ne ta hanyar kayan resistor, gabaɗaya lokacin farin ciki film resistor 0603 kunshin da ke sama na iya yin 100ppm / ℃, ma'ana cewa canjin yanayin zafin jiki na 25 digiri Celsius, ƙimar juriya na iya canzawa ta 0.25%.Idan 12bit ADC ne, canjin 0.25% shine 10 LSB.Saboda haka, ga op-amp kamar AD620, wanda ya dogara da resistor guda ɗaya kawai don daidaita haɓakawa, yawancin tsofaffin injiniyoyi ba za su yi amfani da shi don dacewa ba, za su yi amfani da da'ira na al'ada don daidaita haɓakawa ta hanyar rabon resistors biyu.Lokacin da masu juriya suka kasance nau'in resistors iri ɗaya, canjin juriya da ke haifar da zafin jiki ba zai haifar da canji a cikin rabo ba, kuma kewayawa zai kasance mafi kwanciyar hankali.A cikin ƙarin buƙatar madaidaicin kayan aiki, za a yi amfani da masu adawa da fim ɗin ƙarfe, ɗigon zafin su zuwa 10 zuwa 20ppm yana da sauƙi, amma ba shakka, shima ya fi tsada.A takaice dai, a cikin madaidaicin aikace-aikacen kayan aiki na kayan aiki, ƙimar zafin jiki tabbas shine ma'auni mai mahimmanci, juriya ba daidai ba zai iya daidaita sigogi a makaranta, canjin juriya tare da zafin jiki na waje ba a sarrafa shi ba.
Tsarin resistor - tsarin tsarin resistor ya fi, a nan don ambaci aikace-aikacen da za a iya tunanin.Ana amfani da mai farawa na injin gabaɗaya don yin cajin babban ƙarfin lantarki na aluminium, sannan rufe relay don kunna wuta bayan cika aluminum electrolytic.Wannan resistor yana bukatar ya zama mai juriya mai girgiza, kuma yana da kyau a yi amfani da babban juriyar waya.Adadin wutar lantarki ba shi da mahimmanci sosai, amma ikon nan take yana da girma, kuma resistors na yau da kullun suna da wahalar cika buƙatun.High ƙarfin lantarki aikace-aikace, kamar resistors for capacitor fitarwa, inda ainihin aiki ƙarfin lantarki wuce 500V, shi ne mafi kyau a yi amfani da high irin ƙarfin lantarki vitreous enamel resistors maimakon talakawa ciminti resistors.Aikace-aikacen sha na karu, irin su na'urori masu sarrafa silicon a ƙarshen biyu suna buƙatar daidaita RC don yin sha, don yin kariya ta dv/dt, yana da kyau a cimma masu tsayayyar wayoyi marasa ƙarfi, don samun kyakkyawan aikin ɗaukar spikes kuma ba sauƙi ba. lalacewa ta hanyar girgiza.
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Lokacin aikawa: Mayu-19-2022