Kev ua tau zoo thiab daim ntawv thov ntawm siab prepision resistors

Kev txhim kho thiab siv cov thev naus laus zis tshiab hauv kev lag luam resistor tau ua rau kev txo qis hauv qhov loj ntawm resistors. Cov lag luam tshiab tau xav tau kuj tau muab cov khoom siv hluav taws xob sib zog los tsim cov khoom lag luam nrog kev ua tau zoo dua thiab ruaj khov. Raws li kev siv ntau hom precision resistors yuav ntau dua thiab ntau dua, kev ua haujlwm ntawm precision resistors tau dhau los ua qhov tseem ceeb dua. Cov ntsiab lus tseem ceeb ntawm cov ceev ceev xws li ntsuas kub (tcr), hluav taws xob siv hluav taws xob (ESD), thermal electromotive quab yuam (EMF), suab nrov, thiab lwm yam.
Kev txhim kho ntawm tag nrho cov kev ua tau zoo ntawm cov kab ke tau ua tiav los ntawm txhua lub tshuab hluav taws xob lossis cov tawv nqaij. Qhov kev ua tau zoo tag nrho yog txiav txim siab los ntawm qhov weakest txuas hauv Circuit System. Txhua qhov sib xyaw ua rau qee qhov kev ua tau zoo rau qhov txheej txheem hluav taws xob tag nrho. Tshwj xeeb, luv-lub sij hawm ntau dhau, ntev ntev ruaj khov, teb tau teb, thiab suab nrov. Hauv kev txiav txim siab tsis tsim tawm kev lag luam, muaj plaub tus neeg nyiam ua haujlwm, ua cov ntaub ntawv ua kom zoo nkauj nrog cov kev xav tau thiab cov nyiaj siv sib txawv.
Cov lus 1 luv luv piav txog qhov zoo thiab qhov tsis zoo ntawm ntau yam kev cuam tshuam siv tshuab, kev ntxhov siab, thiab yam hluav taws xob.
Kev ntxhov siab, seb cov tshuab lossis cua sov, ua rau hloov cov hluav taws xob cov khoom siv ntawm resistors. Yog hais tias tus resistor hloov puab, ntev, kev teeb tsa, lossis cov qauv molecular vim kev ntxhov siab, hluav taws xob ntawm lub resistor tseem yuav hloov pauv.
Thaum twg tam sim no ntws los ntawm lub res resistor, nws generates tus kheej-cua sov, thiab hloov hauv qhov kub thiab txias ua rau cov khoom siv los nthuav lossis cog lus mechanically mechanically. Lub zoo tagnrho resistor muaj lub peev xwm los txiav sib npaug cov xwm txheej no. Qhov kev ua kom ruaj khov txhim kho muaj peev xwm tswj hwm lub zog ntawm lub cev muaj kev tsim khoom thiab tshem tawm cov kev tsim kho kom tau nyiaj thiab kev ntxhov siab thaum siv cov resistor.
Peb yuav muab cov yam ntxwv sib txawv ntawm cov thev naus laus zis sib txawv thiab sib tham txog kev siv ntawm txhua hom resistor nyob rau hauv precision circuits.
Ntawv ci tiv taus
Tshwj xeeb cov ntawv ci resistor alloys (npib tsib xee / chromium thiab additives) tau sib piv rau cov kev ntxhov siab tshwj xeeb los ntawm kev ntxhov siab thiab kev ntxhov siab. Tus neeg tiv thaiv kab qauv yog laser etched rau hauv cov ntawv ci resistor alloy. Cov txheej txheem no tsis paub txog cov yam ntxwv tseem ceeb ntawm kev kub ntxhov, tsis muaj peev xwm siv hluav taws xob, tsis muaj peev xwm, thiab lub suab nrov nrawm nrawm.
Cov yam ntxwv no coj lub siab ruaj khov thiab kev ntseeg tau mus rau hauv lub vojrcuit Court. Tsis muaj kev sib raug zoo ntawm kev tsim tawm qhov tseeb, kev ruaj khov thiab kev teb nrawm yog suav tau. Txhawm rau kom tau txais cov nuj nqis ua qhov tseem ceeb, ntau hlau ntawv ntawv nyiaj hlau hlau ntawv nyiaj yog qhov sib npaug thiab xaiv tshem tawm sab hauv cov ntaub ntawv luv luv. Thaum cuam tshuam nrog cov kev yuav tsum muaj, thaj chaw yog xaiv tau hauv kev paub tiv thaiv nce ntxiv kom nce cov theem tsis kam ua cov kauj ruam me me.
Cov qauv kub coefficient ± 1 ppm / degree}}} degree patrix nws yog ke nrog (rooj 1).

Lub voj voog Resease txoj kev tsim nyob rau hauv cov hlau filkas txo kev cuam tshuam nrog kev ua haujlwm siab tshaj plaws ntawm {0. 08 μh. Qhov siab tshaj plaws capensance yog 0.5 pf. Lub sijhawm teb ntawm 1- kω resistor yog tsawg dua 1 ns txog 100 MHz. Lub sijhawm nce yog txiav txim los ntawm tus nqi resistor, tab sis siab dua lossis qis dua lossis qis dua tsuas yog qeeb qeeb dua li cov txiaj ntsig nruab nrab. Tsis muaj lub suab nrov tshwj xeeb yog ib qho tseem ceeb tshaj plaws hauv kev hloov hloov tsheb khiav nrawm, xws li cov teeb liab hloov dua siab tshiab.
Lub dc ua rau ntawm 1- kω bulk hlau ntawv yuav muab piv rau nws cov actance ntawm 100 mHz siv cov qauv hauv qab no:
Ac tsis kam / dc kuj=1. 001
Ntawv ci resoror technologies tsim cov neeg tsim tawm nrog cov tshwj xeeb tshwj xeeb uas yav dhau los tsis muaj thiab xav tau. Cov no suav nrog qhov kub ntawm {{{{{0}}. 2} {± 0.005}. 2 ppm), thiab zoo li qub ntawm tsawg kawg 25 kV.
Cov khoom lag luam zoo li cas thiaj yuav tsum tau ua?
Ntawm chav kawm, tsis yog txhua tus kws tsim khoom lag luam muag khoom yuav tsum muaj kev ua tau zoo tag nrho. Nyob rau hauv ntau daim ntawv thov, qis-kev ua yeeb yam tiv taus yuav txaus, yog li cov lus teb poob rau hauv plaub pawg.
1. Hlau ua cov khoom lag luam uas tuaj yeem txhim kho qhov kev ua tau zoo tag nrho ntawm cov khoom siv.
2. Ib lossis Ntau Hlau Cov Khoom Siv Hluav Taws Xob tuaj yeem ua tiav qhov kev ua tau zoo tshaj plaws ntawm lub cuab yeej.
3. Hlau FOR resistors tuaj yeem txhim kho kev txhim kho Circuit Cochnology thiab txhim kho ntau yam khoom muaj txiaj ntsig ntawm cov khoom siv ua ntej.
4. Kom meej meej los siv precision resistors (piv txwv: Hlau Ntawv: Hlau Ntawv: Hlau Ua Ntej: Hlau
Nyob rau qeb Ob, piv txwv li, ib qho parameter yuav tsum tau hnyav tawm tsam cov kev lag luam tag nrho kev lag luam. Siv cov kev ua tau zoo dua tuaj yeem txuag cov nqi vim tias cov nyiaj them nqi tuaj yeem raug txo (thiab lawv cov kev teeb tsa tau txais kev cawmdim). Txhim kho qhov ua kom yog tus tsim hluav taws xob ntau dua li kev txhim kho cov cuab yeej los txhim kho qee qhov kev ua tau zoo dua li precision resistors.
Precision Wirewound Distors
Wirewound cov tsis tau feem ntau muab faib ua hluav taws xob wirewound deforors thiab precision wirisound resistors. Lub zog hlau hluav taws xob yuav hloov pauv thaum siv thiab tsis tuaj yeem siv rau hauv cov ntawv thov uas yuav tsum tau ua raws li kev ua kom pom tseeb ntawm kev tsim tawm. Yog li ntawd, peb yuav tsis tham txog lub zog hluav taws xob tiv thaiv.
Thaum lub sij hawm tsim kev tsim khoom ntawm wirewound deistors, sab hauv ntawm cov hlau resistor (sab ze ntawm cov pob txha resh Kev deformation kev sib raug zoo.
Deformation tshwm sim los ntawm cov txheej txheem no thiab thaum cov kev ua kis las tom ntej ntawm cov xaim yog cov khoom siv, uas txwv rau txoj kev ywj pheej lossis thim rov qab. Unpr Seprredictable tas mus li ua rau kev hloov pauv ntawm cov hluav taws xob thiab kev tiv thaiv ntawm cov hlau. Qhov tshwm sim yog ntau yam kev ua tau zoo.
Wirewound defors yog ua los ntawm cov hlau ntoo ntawm cov pob txha insulating. Cov xov hlau ntawm txawv diameters thiab ntev muaj kev pom zoo kev tawm tsam thiab cov yam ntxwv. Precision wirewound resistors muaj cov tshuaj tiv thaiv zoo dua thiab cov suab nrov qis dua li cov yeeb yaj kiab nyias nyias thiab cov yeeb yaj kiab tuab. Wirewound resors kuj muaj qis dua qhov kub thiab qhov ruaj khov thiab ruaj khov.
Wirewound Desors tuaj yeem muaj thawj qhov tseeb ntawm ± 0. 005%. Qhov chaw kub qhuav tuaj yeem qis li 3 ppm / degree tus kheej; Tab sis rau kev tiv thaiv qis wirewoound resistors nws feem ntau 15 ppm / degree rau 25 ppm / degree. Thermal suab nrov yog tsawg, thiab taug qab qhov kub qhuav mus sab nraum qhov kev ua haujlwm ntau zaus kuj tseem tuaj yeem ncav cuag ± 2 PPM / degree. Nws yuav tsum pom tseeb tias wirewonound resortors tsis muaj SMD Cov Khoom Siv Hluav Taws Xob (SMDs Raw tsis tuaj yeem siv rau cov xwm txheej uas qhov hnyav thiab ntim ntawm lub resistor yuav tsum tau.
Txawm li cas los xij, vim yog cov qauv winding ntawm wirewound deforors, wirewound resistors yog inductive, thiab cov cua zoo sib xws tau tsim tau lub peev xwm. Tshwj xeeb winding tshuab yuav raug siv los txo kev inductance los txhim kho lub sijhawm teb thaum siv cov resistor. Vim yog cov inherent interive thiab caperitive tsim, wirewound resistors tsis muaj cov yam ntxwv zoo. Tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov saum 50kHz. Vim tias kev ua raws thiab tus nqi yam, precision wirewound resistors tam sim no nyob rau lub verge ntawm raug tshem tawm.
Nyias Zaj Duab Xias
Nyias zaj duab xis tawm tsam yog tsim los ntawm evaporating ib zaj duab xis nrog ib txoj kev tiv thaiv uas siv ib txoj kev tiv thaiv [1 angstrom (a) {{{3} {{{{{3} anompeters]. Nyias zaj duab xis tuaj yeem tsim cov txiaj ntsig ntau dua nyob rau thaj chaw muab ntau dua li wirewon resistors thiab yog cov khoom siv pheej yig dua. Qhov no ua rau zaj duab xis nyias ua rau kev xaiv nyiaj ntau dua hauv kev siv nyiaj txiag qhov twg nruab nrab-preforisity yuav tsum muaj thiab chaw ua hauj lwm tau txiav txim siab.
Nyias zaj duab xis tawm tsam yog rhiab rau qhov kub. Qhov tsim nyog tuab ntawm zaj yeeb yaj kiab tuaj yeem xaiv tau los tsim ntau yam kev tiv thaiv muaj nuj nqis, tab sis ib zaj yeeb yaj kiab tshwj xeeb tsuas yog tsim cov kev tiv taus nrog qee yam tsis kam. Yog li ntawd, zaj duab xis ntawm ntau yam tuab yog siv los tsim cov despors nrog ntau yam tsis kam.
Qhov ruaj ntseg ntawm zaj duab xis cuam tshuam los ntawm kev nce hauv qhov kub. Cov kev hloov pauv ntawm kev laus ruaj ntseg ntawm zaj duab xis nyob ntawm qhov tuab ntawm zaj duab xis kom ua tiav cov txiaj ntsig ntawm cov txiaj ntsig ntawm cov txiaj ntsig tau yooj yim dua. Tshuaj / kho tshuab Kev laus kuj suav nrog oxidation ntawm lub resistor alloy tshwm sim los ntawm kub nce ntxiv.
Qhov kub txav ntawm zaj duab xis ntawm tuab tuab kuj tuaj yeem muaj cov kev tsis zoo ntawm cov nqi tiv thaiv. High-resistance nyias cov ntxias dej hiav txwv muaj ib qho kev cuam tshuam loj dua. Vim tias Thinner cov yeeb yaj kiab, qhov ntau raug nws yog rau oxidation. Vim tias nyias zaj duab xis yog qhov yooj yim heev, lawv yooj yim cuam tshuam los ntawm hluav taws xob zoo li qub.
Tsis tas li ntawd, vim tias qhov hlau lub ntsiab yog qhov me me, cov neeg ua yeeb yaj kiab ua yeeb yaj kiab tseem muaj kev cuam tshuam rau kev xeb los ntawm ya raws. Thaum dej vapor hla dhau ntawm lub pob xa tawm, nws tsim cov yeeb yaj kiab tiv thaiv, ua rau muaj lub DC cov hluav taws xob tsawg.
Los ntawm lub sij hawm ntev-multure zaj duab xis, siab-precision resistort kuj tseem tuaj yeem ua tiav kev kub ntxhov ntawm ± 0. 01%, nrog rau kev ruaj khov ntev. Txawm li cas los xij, lub zog tsis siab, qhov qis tsis kam muaj kev ua tsis zoo, nws tsis yog kev sib txawv ntawm cov khoom siv me me, thiab kev sib txawv ntawm cov kab sib txawv tsis zoo.
Tuab zaj duab xis tsim tawm
Nyob rau hauv kev sib tham dhau los, peb tau piav qhia tias wirewonound resistors tsis siv tau rau hauv cov ntawv thov nti vim qhov loj me, ntim thiab qhov hnyav. Nyob rau hauv cov ntawv thov tsawg dua wirewound deenors, tuab zaj duab xis tsim nyog muaj qhov chaw ua yeeb yaj kiab ntau dua (siab loj) thiab yog pheej yig dua.
Tuab Film Worsors Muaj cov lus teb nrawm nrawm, zoo ib yam li cov tshuab ua kom yooj yim, tab sis tuab zaj duab xis yog qhov nrov nrov tshaj plaws. Thaum siv nyob rau hauv cov ntawv thov tsawg dua, tuab zaj duab xis tawm tsam thiab siv dav hauv ntau yam ntawm thaj chaw siab ntawm cov kev ntsuas siab.
Cov yeeb yaj kiab tuab tso siab rau ntawm particle-rau-particle sib cuag ntawm lub khob matrix los ua ib txoj kev tiv thaiv. Cov ntsiab lus hu tau tag nrho cov kev tiv thaiv tag nrho. Txawm li cas los xij, cov lus no raug thaiv los ntawm kev ntxhov siab thermal thaum siv cov resistor. Vim tias lawv muaj ntau txoj kev sib tw sib tw, txoj kev tiv thaiv tsis kam yuav tsis tawg. Txawm li cas los xij, tus nqi tiv-tus nqi yuav nce zuj zus sijhawm thiab raws li qhov kub nce siab. Yog li ntawd, tuab zaj duab xis tawm tsam tsis ruaj khov raws li lwm cov resistor technologies.
Tus qauv particle kuj tau txhais tau tias tuab cov neeg ua yeeb yaj kiab fuab muaj lub suab nrov thiab tso cov hluav taws xob siab los ntawm cov qauv resistor los ntawm cov qauv tsim tawm ntawm cov suab nrov loj. Rau ib tug muab loj resistor, lub siab dua cov nqi tiv taus thiab qis dua cov hlau cov ntsiab lus, cov suab nrov dua thiab tsis tshua muaj. Cov iav qauv ntawm tuab zaj duab xis Dos cov ntaub ntawv ib lub iav uas tseem tiv thaiv lub tsho tiv no los tiv thaiv cov tshuaj tiv thaiv tuab ntau dua li cov yeeb yaj kiab zaj duab xis.
Los ntawm kev txhim kho tuab ntawm cov tuab zaj duab xis Resestor pases, cov ntxaij vab tshaus tuab tuab tshaj plaws Nws qhov tseeb tshaj plaws kuj tuaj yeem ncav cuag ± {2}}. 01%. Precision tuab zaj duab xis yog cov intrassam tshuab hauv high-voltage, siab-tiv, thiab cov kev siv hluav taws xob siab. Qhov tsis zoo ntawm tuab zaj duab xis ua kom yog tias nws yog qhov nyuaj kom ua tiav qhov siab tsis kam, lub suab nrov tsis zoo, thiab lub sijhawm ntev ruaj khov ntau dua li lwm tus neeg tiv thaiv kom precision.