Chii chinonzi Resistor Parameters?

Kune akawanda ma paramita eanopikisa, kazhinji isu tinowanzo kunetseka nezve kukosha, kurongeka, huwandu hwesimba, izvi zvitatu zviratidzo zvakakodzera.Ichokwadi kuti mumaseketi edhijitari, hatifanire kutarisisa kune zvakawanda zvakawandisa, mushure mezvose, kune chete 1 uye 0 mukati medhijitari, kwete yakawanda kuverenga minuscule impact.Asi mumaseketi eanalogi, patinoshandisa chaiyo voltage sosi, kana analog-to-digital shanduko yezviratidzo, kana kukudza chiratidzo chisina kusimba, shanduko diki mukukosheswa kwekupokana kuchava nekukanganisa kukuru.Munguva yekurova neanopikisa, hongu, iri muchiitiko chekugadzirisa masaini eanalogi, uye gare gare, maererano neanalogi yedunhu mashandisirwo ekuongorora maitiro ega ega parameter yeanopikisa.

Kuwanda kwekupikisa kukosha kwemushonga - chiyero chekupikisa kukosha kwekupikisa kusarudzwa kunowanzogadziriswa nechikumbiro, chakadai semuganho wemwenje we LED ikozvino, kana chiratidzo chemazuva ano sampling, kukosha kwekupikisa kwemushonga chaizvoizvo hapana zvimwe zvingasarudzwa.Asi dzimwe nguva, kune dzakasiyana siyana sarudzo dzeanopikisa, sekukwidziridzwa kwechiratidzo chevoltage, sezvakaratidzwa mumufananidzo, kukwidziridzwa kune hukama nereshiyo yeR2 kusvika R3, uye haina chekuita nekukosha kwe. R2 uye R3.Panguva ino, kusarudzwa kwekupikisa kwemushonga kuchiri kunobva pane: kunyanya kupikisa kwemushonga, hukuru hwehutu hunopisa, hunowedzera kushanda kweamplifier;iyo idiki kushorwa kweanopikisa, iyo yakakura basa iri ikozvino, iyo yakakura ruzha rwezvino, iyo yakaipisisa kushanda kweamplifier;ichi ndicho chikonzero nei akawanda amplification maseketi ari makumi eK kuramba, pane kudikanwa kwekushandisa hombe yekupikisa kukosha, kana kushandiswa kwevateveri vevoltage, kana kushandiswa kweT-network kudzivirira.

Kwete-Inverting Amp

Iko kurongeka kweanopikisa - kurongeka kweanopikisa kunonzwisiswa zvakanaka, pano usaite verbose.Resistor kururama kunowanzoita 1% uye 5%, kunyatsoita 0.1%, etc. Mutengo we 0.1% inenge kagumi kupfuura 1%, uye 1% inenge 1.3 nguva kupfuura 5%.Kazhinji, iyo kodhi yechokwadi A=0.05%, B=0.1%, C=0.25%, D=0.5%, F=1%, G=2%, J=5%, K=10%, M=20%.

Simba remberi remudziviriri - simba remudziviriri ringadai rakanyanya nyore, asi kazhinji riri nyore kushandisa zvisina kunaka.Semuenzaniso, iyo 2512 chip resistor, iyo quota simba i1W, zvinoenderana neyakaomeswa yeanopikisa, tembiricha inodarika makumi manomwe madhigirii Celsius, chinopikisa chinofanira kuderedzwa kuti chishandise.2512 chip resistor pakupedzisira ingani simba rinogona kushandiswa, pakamuri tembiricha, kana PCB Mapedhi pasina chaiyo kupisa dissipation kurapwa, 2512 chip resistor simba kusvika 0.3W, tembiricha inogona kupfuura 100 kana kunyange 120 madhigirii Celsius..Mu 125 degrees Celsius tembiricha, zvichienderana netembiricha inodzikira curve, huwandu hwe2512 simba hunoda kudzikiswa kusvika pa30%.Mamiriro ezvinhu aya chero pasuru resistors vanofanira kuteerera, musatenda muna nominal simba, kiyi chinzvimbo yakanakisisa kaviri cheki kudzivisa kusiya matambudziko akavanzika.

Resistor inomira kukosha kwevoltage - resistor inomira voltage value haiwanzo kutaurwa, kunyanya kune vatsva, kazhinji vane pfungwa shoma, vachifunga kuti ma capacitor anongomira kukosha kwevoltage.Iyo magetsi inogona kushandiswa kumativi ose maviri emushonga, imwe inotarirwa nehuwandu hwesimba, kuve nechokwadi kuti simba haripfuuri huwandu hwesimba, imwe yacho ndeyekupikisa kwehutano hwemagetsi.Kunyange zvazvo simba remuviri wekudzivirira risingapfuure simba rakarongerwa, yakawandisa voltage inogona kukonzera kusagadzikana, creepage pakati pepini resistor, uye kumwe kukundikana, saka zvakakosha kusarudza inogadzirisa resistor maererano nemagetsi anoshandiswa.Zvimwe zvepasuru inomira voltage kukosha dzinosanganisira: 0603 = 50V, 0805 = 100V, 1206 kusvika 2512 = 200V, 1/4W plug-in = 250V.Uye, mashandisirwo enguva, iyo voltage pane resistor inofanirwa kuve idiki pane iyo quota inomira voltage kukosha inopfuura 20%, zvikasadaro zviri nyore kuve nematambudziko mushure menguva refu.

Temperature coefficient of resistance - Chiyero chekushisa chekudzivirira ndiyo parameter inotsanangura kuchinja kwekudzivirira nekushisa.Izvi zvinonyanya kutariswa nezvinhu zveanopikisa, kazhinji gobvu firimu chip resistor 0603 pasuru iri pamusoro inogona kuita 100ppm / ℃, zvichireva kuti resistor ambient tembiricha shanduko ye25 degrees Celsius, kukosha kwekupokana kunogona kuchinja ne0.25%.Kana iri 12bit ADC, 0.25% shanduko i10 LSB.Naizvozvo, kune op-amp senge AD620, iyo inotsamira pane imwe chete resistor kugadzirisa iyo amplification, mazhinji mainjiniya ekare haazvishandise kuti zvive nyore, ivo vanozoshandisa yakajairika dunhu kugadzirisa kukwidziridzwa nereshiyo yeanopikisa maviri.Apo vanopikisa vari rudzi rumwe chete rwezvidziviriro, kuchinja kwekupikisa kukosha kunokonzerwa nekushisa hakuzounza kuchinja kwehuwandu, uye dunhu richava rakagadzikana.Mukuwedzera kudiwa kwakanyatso kuridzwa, simbi firimu resistors ichashandiswa, tembiricha yavo inodonha kusvika 10 kusvika 20ppm iri nyore, asi hongu, zvakare inodhura.Muchidimbu, mumashandisirwo akanyatsonaka ekirasi yezviridzwa, iyo tembiricha coefficient ndeyechokwadi yakakosha parameter, kushorwa hakusi kwakarurama kunogona kugadzirisa ma parameters kuchikoro, kushanduka kwekupikisa nekunze kwekushisa hakudzorwi.

Chimiro chemudziviriri - chimiro chemushonga chinowedzera, pano kutaura chikumbiro chinogona kufungwa nezvazvo.Iyo yekutanga resistor yemuchina inowanzo shandiswa kufanochaja iyo hombe aluminium electrolytic, uye wobva wavhara relay kuti ubatidze simba mushure mekuzadza iyo aluminium electrolytic.Ichi chinopikisa chinoda kutyisa, uye zviri nani kushandisa hombe wirewound resistor.Huwandu hwesimba reanopikisa hauna kunyanya kukosha, asi simba repakarepo rakakwira, uye zvinojairwa zvinopikisa zvinonetsa kuzadzisa zvinodiwa.High voltage applications, senge resistors for capacitor discharge, uko chaiyo inoshanda voltage inodarika 500V, zviri nani kushandisa yakakwira voltage vitreous enamel resistors pane zvakajairwa simende resistors.Spike absorption applications, senge silicon inodzorwa mamodule pamativi ese ari maviri inoda kufanana RC kuita kunyura, kuita dv/dt kudzivirira, zviri nani kuwana zvisiri-inductive wirewound resistors, kuti uve nekuita kwakanaka kwekunyura kwespikes uye kwete nyore. kukuvadzwa nekuvhunduka.

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