Impedance mukati PCB dhizaini kwakakosha pakuona kuti chiratidzo chechokwadi chakakwana. Inotonga nzira iyo zvikwangwani zvinopararira kuburikidza nedunhu uye zvinopesvedzera zvakanyanya kuunza simba uye chiratidzo chemhando. Nekunyatso gadzirisa impedance muPCB dhizaini, unogona kudzivirira nyaya dzakadai sekukanganisa kwechiratidzo uye kuratidza, ukuwo uchidzikamisa kukanganiswa kwemagetsi (EMI). High-frequency circuits, senge USB kana PCIe, inoda chaiyo impedance control kuti ishande nemazvo. Iyo impedance inogona kuverengerwa uchishandisa formula Z = R – j/ωC + jωL, apo ω = 2πf. Iyi fomula yakakosha pakuchengetedza masaini akajeka uye kuderedza crosstalk, pakupedzisira kuchengetedza mhando yePCB dhizaini yako.
Zvitsva Zvitsva
Impedance yakakosha pakuchengetedza masaini akajeka muPCB dhizaini. Zvinokanganisa mafambiro anoita masaini uye nekumisa matambudziko seruzha kana kukanganisa.
Shandisa maturusi ekugadzira kare kuti utarise impedance mhedzisiro. Zvishandiso izvi zvinowana matambudziko nekukurumidza uye chengetedza nguva nemari usati wagadzira PCB.
Trace size inoshandura impedance zvakanyanya. Yakafara inoteedzera yakadzika impedance, uye yakaonda inoiwedzera. Sarudza iyo chaiyo trace hupamhi kuti uwane iyo impedance yaunoda.
Material properties, semabatiro avanoita magetsi, chinja impedance. Shandisa zvinhu zvine Dk dzakatsiga kukosha kwezviratidzo zvakajeka mumaseketi anokurumidza.
Kufananidza impedance inomisa chiratidzo kubhuroka. Magadzirirwo akanaka anoita kuti zviratidzo zvive pachena uye zvinoita kuti dunhu rishande zvakanaka.
Kunzwisisa Impedance muPCB Dhizaini
Chii chinonzi Impedance?
Impedance inoreva kuti yakawanda sei dunhu rinopikisa kuyerera kwezvino. Inobatanidza kupikisa uye kugadzirisa. Chiratidzo chekudzivirira ndiZ, uye chinoyerwa neOhms. Kusiyana nekupikisa, impedance inoshanduka ne frequency nekuda kwe capacitors uye inductors. MuPCB dhizaini, impedance inobatsira kudzora shanduko yemagetsi uye inochengeta masaini akajeka.
Tip: Shandisa fomula Z = R - j/ωC + jωL kuverenga impedance. Pano, ω = 2πf. Iyi fomula inoratidza kuti kuita kunoenderana sei nekuwanda.
Impedance yakakosha zvikuru mumaseketi anokurumidza. Parasitic zvinhu zvinogona kukanganisa masaini. Kuyera impedance, shandisa zvishandiso senge simulation software kana online calculator. Zvishandiso izvi zvinokubatsira kufanotaura kuti impedance inokanganisa sei dhizaini yako.
Sei Impedance Yakakosha muPCB Dhizaini?
Impedance inokanganisa mafambiro anoita masaini uye mashandiro anoita matunhu. Yekukurumidza dhijitari uye RF masisitimu inoda chaiyo impedance kudzivirira matambudziko echiratidzo. Sezvo ma frequency anokwira, kudzora impedance kunowedzera kukosha.
Impedance inotevera mitemo yekugadzira, zvichiita kuti mabhodhi ave nyore kuvaka.
Inodzikamisa electromagnetic interference (EMI) uye crosstalk, ichichengeta masaini akachena.
Kufananidza impedance inomisa voltage ripples uye inovandudza kuyerera kwemagetsi.
Historical Trends muImpedance Kunzwisisa:
Gore/Period | Kuvandudza Kwakakosha | Zvazvinoreva |
|---|---|---|
Mazuva Ekutanga | Tarisa pane impedance uye kumiswa | Kunzwisisa kwekutanga kwemaitiro ekutapurirana |
Yakawedzera Data Rates | Kugadzirisa kurasikirwa munzira | Kuda mamwe masimulation akaoma |
Nhanganyaya yeDifferential Pairs | Specialised transmission line management | Kuvandudzwa kwechiratidzo chekuvimbika |
Kwazvino Maitiro | Kufunga nezve vias pamitengo yepamusoro yedata | Zvinetso mukuchengeta kunaka kwechiratidzo |
Musiyano Pakati peImpedance uye Resistance
Impedance uye kuramba hazvina kufanana. Resistance inovhara ikozvino muDC maseketi uye inogara yakafanana pama frequency ese. Impedance inoshanduka ne frequency uye inosanganisira reactance, iyo inoshandura chikamu pakati pevoltage uye yazvino.
mamiriro | Impedance (Z) | Kurwisana (R) |
|---|---|---|
tsananguro | Kupikiswa kwakazara kune zvazvino mumaseketi eAC, kunosiyana ne frequency | Kupikiswa kune zvazvino mumaseketi eDC, nguva dzose zvisinei nekuwanda |
Kuverenga | Z = √(R² + X²) | R = V / Ini |
Phase Angle | Iine chikamu chekona nekuda kwekuita | Hapana phase angle, voltage uye zvazvino zviri mu-phase |
Frequency Dependence | Inosiyana ne frequency nekuda kwe reactance | Constant, hazvibvi pane frequency |
Kuziva misiyano iyi kunokubatsira kugadzira maseketi ari nani. Impedance muPCB dhizaini inochengeta masaini akasimba, nepo kuramba kunodzora kuyerera kwazvino.
Nzira dzekuona Impedance
Kuwana impedance muPCB dhizaini yakakosha kune masaini akajeka. Zvinobatsira kudzivirira matambudziko nemashandiro anoita matunhu. Unogona kuverenga impedance kushandisa maturusi kana mafomula ari nyore. Nzira imwe neimwe ine zvikomborero zvayo zvichienderana nezvido zvako.
Circuit Simulation Tools
Maturusi ekufananidza akanakira kutarisa impedance muPCB magadzirirwo. Vanoshandisa masvomhu kuratidza mafambiro anoita masekete mumamiriro akasiyana. Zvishandiso izvi zvinofanotaura kuti sei impedance inokanganisa zviratidzo.
Simbeor chishandiso chakavimbika chekutevedzera. Inoverengera impedance nekutarisa saizi yenjanji, zvinhu, uye nzira. Iyi nzira inoshanda zvakanaka kune yakakwirira-frequency maseketi. Maturusi ekufananidza anowanawo matambudziko akaita seasina kuenderana impedance vasati vavaka PCB.
Tip: Tanga kushandisa maturusi ekuenzanisa nekukurumidza kuchengetedza nguva nemari.
Simulations inoenderana nemhedzisiro yenyika chaiyo. Semuyenzaniso:
4 pasi vias vane impedance pakati pe30 ne75 ohms.
2 pasi vias anoratidza akatenuka materu, zvichireva maitiro ekuwedzera inductive.
Mienzaniso iyi inoratidza kuti maturusi ekuenzanisa akakwana sei pakuyera impedance.
Online Impedance Calculators
Online Calculator inokurumidza uye nyore kuwana impedance. Iwe unongopinza trace wide, ukobvu, uye dielectric constant. Izvo zvakanaka kune macheki nekukurumidza kana magadzirirwo ekutanga.
Nzira dzakasiyana dzine huchokwadi hwakasiyana. Semuyenzaniso:
nzira | Akarurama Chikamu | Error Rate |
|---|---|---|
Wheeler's equations | Zvakanyatsojeka | Zvikanganiso zvisingasviki 0.7%. |
IPC-2141 equation | Zvishoma zvakarurama | Kuwedzera kukanganisa |
Online Calculator haina kujeka sematurusi ekuenzanisa. Asi ivo vanobatsira pakufungidzira nekukurumidza. Vanoratidzawo kuti sarudzo dzekugadzira dzinokanganisa sei impedance.
Cherechedza: Gara kaviri-tarisa online calculator mhinduro nedzimwe nzira.
Dzinoshanda Nzira uye Formula
Nzira dzinoshanda dzinoshandisa maoko-pane mafomula kuwana impedance. Izvi zvinobatsira pakutarisa mhinduro dzekuenzanisa kana kuita masvomhu ekuverenga.
Mafomula akajairika anosanganisira:
Parameter | Formula/Tsanangudzo |
|---|---|
Odd-modhi Impedance | Inoshandisa mapatya-tsvimbo yekufambisa mutsara mafomula e inductance uye capacitance. |
Inoshanda Dielectric Constant | Inoenderana nezvinhu zvenyama seDkxy uye Dkz. |
Differential Impedance | Ztwin kaviri Zodd. |
Impedance Standard Substrates yakakosha kune dzinoshanda nzira. Vanopa mareferensi akatsiga ezviyero. Aya ma substrates anoderedza zvikanganiso uye anoshanda zvakanaka kune yakakwirira-frequency maseketi.
Kushandisa zvose zviri zviviri nzira dzinoshanda uye maturusi kunovandudza impedance control. Izvi zvinoita kuti zviratidzo zvirambe zvakasimba uye zvinoderedza kukanganisa, zvichiita kuti masekete ashande zviri nani.
Zvinhu Zvinochinja Impedance muPCB Dhizaini
Zvinhu zvakawanda zvinokanganisa impedance muPCB dhizaini. Kuziva izvi kunokubatsira kudzora impedance uye chengetedza zviratidzo zvakajeka. Ngatitarisei zvinhu zvitatu zvakakosha: saizi yekutsvagisa, zvivakwa zvezvinhu, uye chinhambwe chendege yereferensi.
Trace Saizi
Saizi yePCB trace inoshandura yayo impedance. Maronda akafara akadzikira impedance, asi nhete inoisimudza. Makobvu maronda zvakare akadzikira impedance nokuti vanotakura zvakawanda zvemazuva ano. Kudzora impedance, iwe unofanirwa kuverenga saizi yekutevera nekungwarira.
Somuenzaniso, kana uchida 50-ohm impedance, hupamhi hwekutsvagisa hunofanirwa kuenderana nechinhu uye chinhambwe kundege yereferensi. Kuchinja kudiki muhupamhi kunogona kukonzera hombe impedance misiyano. Mune imwe nguva, trace yairehwa 50 ohms yakagadzirwa pa 0.35mm yakafara asi yakaguma 0.3mm yakafara. Izvi zvakakonzera impedance kukwira kusvika ku53 ohms. Izvi zvinoratidza kuti nei saizi chaiyo yekutevera yakakosha.
Tip: Shandisa maturusi epamhepo kana masimulator kuti uwane yakanakisa saizi yekutevera yedhizaini yako.
Zvivakwa Zvekushandisa
Iyo dielectric inogara (Dk) yePCB zvinhu inokanganisa impedance. Dk inoratidza kuti isimba rakawanda sei rinogona kuchengeta chinhu kana zvichienzaniswa nemhepo. Zvese PCB zvinhu zvine Dk yakakwira kupfuura 1, uye inoshanduka ne frequency. Iko kusanganiswa kwegirazi uye resin mune izvo zvakare kunoshandura Dk, izvo zvinokanganisa kuita kwePCB yako.
Zvishandiso zvine high Dk chengetedza zvakanyanya kubhadharisa, izvo zvinobatsira kuchengetedza masaini akajeka pakumhanya kukuru. Asi vanogonawo kuwedzera kurasikirwa kwesimba uye kupindira kwechiratidzo. Semuenzaniso, zvinhu zvine Dk yakakwirira pakati pesimba uye pasi pasi zvinovandudza capacitance. Izvi zvinodzikisira simba network impedance uye inodzikamisa simba rekupinda. Kuenzanisa zvinhu izvi zvakakosha pakudzora impedance.
Cherechedza: Gara uchitarisa iyo dielectric nguva dzose paunenge uchinhonga zvinhu zveakakwira-kumhanya dhizaini. Inokanganisa kuyerera kwechiratidzo uye kurasikirwa kwesimba.
Distance to Reference Plane
Kuti trace iri kure zvakadii kubva kune yayo yereferensi ndege inoshanduka impedance. Pedyo maronda adzikira impedance, apo vari kure vanoisimudza. Izvi zvakakosha mu-multilayer PCBs, uko iyo stackup inoisa iyo yekutevera-kune-ndege nzvimbo.
Miedzo inoratidza izvi zvakajeka:
Distance Effect paImpedance | Chii Chinoitika |
|---|---|
Tsvaga pedyo nendege | Kutadza inodzika |
Tsvaira kure kure nendege | Kutadza anokwira kumusoro |
Somuenzaniso, kana uchida 50-ohm impedance, kugadzirisa chinhambwe chekutevera-kune-ndege inogona kubatsira. Asi ita shuwa kuti shanduko idzi hadzikuvadze mhando yechiratidzo kana kugadzirwa.
Tip: Shandisa simulators kuyedza kuti kureba-kune-ndege kureba kunokanganisa sei impedance usati wapedzisa PCB yako dhizaini.
Parasitic Elements uye Via Impedance
Parasitic zvinhu uye kuburikidza ne impedance zvinokanganisa mashandiro anoita PCB yako. Izvi zvisingadiwe zvemagetsi zvimiro zvinogona kukanganisa masaini, kuderera kwekuita, uye kuwedzera ruzha. Kuziva maitiro avo kunokubatsira kugadzira zvirinani maseketi ane inodzorwa impedance.
Chii chinonzi Parasitic Elements?
Parasitic elements ndeyekuwedzera capacitance, inductance, kana kuramba muPCBs. Zvinoitika nekuda kwechimiro chebhodhi uye zvinhu. Nepo iwe usingakwanise kuvanzvenga, dhizaini yakangwara inogona kuderedza maitiro avo.
Parasitic capacitance inononoka chiratidzo kusimuka uye nguva dzekudonha. Inoderedza bandwidth uye inokonzera chiratidzo echoes kana kurira.
Parasitic inductance inomutsa impedance uye kudonha kwevoltage. Iyo inowedzerawo switching ruzha, kunyanya mumaseketi anokurumidza.
Izvi zvinokanganisa masaini, zvinokonzeresa zvikanganiso zvenguva, uye huwori data. Vanowedzerawo ruzha, vachidzikisa kujeka kwechiratidzo.
Tip: Chengetedza kupfupika uye dzivirira kutendeuka kwakapinza kuti uderedze hutachiona. Shandisa zvakanaka grounding kutema kupindira.
Sei Vias Affect Impedance
Vias inobatanidza PCB maseru asi inounza parasitic capacitance uye inductance. Izvi zvinogona kukuvadza kuyerera kwechiratidzo. Makomba akaputirwa mu vias anogadzira kubatanidza kusingadikanwi pakati pechiratidzo uye pasi akaturikidzana. Izvi zvinogona kukanganisa masaini uye kukuvadza kuita kwedunhu.
Vias inogona kukonzera crosstalk, apo imwe chiratidzo inovhiringidza imwe.
Vanoparadza simba, zvichiita kuti dhizaini yako isanyatsogadzikana uye inobudirira.
Pama frequency akakwira, kuburikidza ne impedance inowedzera, ichiwedzera ruzha uye kudzikisa chiratidzo chemhando.
Kudzora kuburikidza ne impedance, dhizaina vias nekuchenjera. Shandisa back-drilling kuti ubvise zvikamu zvisina kushandiswa zveiyo via barrel. Izvi zvinoderedza parasitic inductance uye inovandudza impedance control.
Kugadzira Kudzora Impedance
Kudzora impedance, funga parasitic zvinhu uye vias panguva yekugadzira. Simulation zvishandiso zvinogona kufanotaura mhedzisiro yavo padunhu rako. Gadzirisa hupamhi hwekutsvaga, nzvimbo, uye kuburikidza nekuisa kuderedza matambudziko uye kuchengetedza masaini akajeka.
Cherechedza: Edza PCB yako mumamiriro chaiwo kuti uone kuti parasitics uye kuburikidza ne impedance haikuvadze kuita.
Nekugadzirisa zvinhu zveparasitic uye kuburikidza ne impedance, unogona kuvaka maPCB anoshanda nemazvo, kunyangwe mukukurumidza kana yakakwira-frequency dhizaini.
Nei Impedance Matching Matters
Impedance yekufananidza ndiyo kiyi yekuita kuti PCB yako ishande nemazvo. Inochengeta masaini akajeka, inochengetedza simba, uye inomisa zviratidziro zvisingadiwe. Pasina iyo, masaini anogona kukanganisa, zvichikonzera kusaita zvakanaka kana kutadza.
Kumisa Signal Reflection uye Kukanganisa
Kana impedance isingaenderane, masaini anodzokera kumashure pamutsetse. Aya mabhanzi anosanganiswa nechiratidzo chekutanga, zvichikonzera kukanganisa. Dambudziko iri rakaipisisa mumaseketi anokurumidza, uko kusawirirana kudiki kunogona kukanganisa kuita.
Impedans kuenzanisa kwakakosha kune high-speed PCB magadzirirwo. Inochengetedza zviratidzo zvakajeka uye inoderedza kufungisisa. Mismatched impedance inogona kukonzera nyaya dzechiratidzo, EMI, uye yakaderera system kuvimbika. Kufananidza impedance inovandudza mhando yechiratidzo uye inowedzera PCB kuita.
Kuti udzivise nyaya idzi, gadzira PCB inoteedzera nemazvo. Shandisa zvishandiso kuverenga iyo impedance chaiyo. Inodzorwa impedance inobatsira masaini kufamba zvakanaka pasina kukanganisa.
Chii chinonzi Reflection Coefficient?
Iyo yekuratidzira coefficient inoratidza kuti yakawanda sei chiratidzo chinobvondokera kubva kune isingaenderane impedance. Shandisa iyi fomula kuiwana:
Reflection Coefficient (Γ) = (ZL - Z0) / (ZL + Z0)
Pano, ZL ndiyo inorema, uye Z0 ndiyo impedance yemutsetse. A zero reflection coefficient zvinoreva kunyatsoenderana. Hunhu hwepamusoro hunoreva kuwedzera kwechiratidzo.
Shanduko muhupamhi hwekutsvagira hunogona kukonzera kusawirirana impedance uye kuratidzwa.
Kunyatsogadzira uye kuenzanisa maitiro kunoderedza matambudziko aya.
Maturusi ekutevedzera anobatsira kuverenga maratidziro uye kugadzirisa kusawirirana.
Nekutarisa iyo inoratidzira coefficient, unogona kuona uye kugadzirisa dhizaini nyaya.
Mabatiro Anoita Chiratidzo uye Kuita Sedunhu
Impedance yekuenzanisa inovandudza chiratidzo chechiratidzo muPCB yako. Inovimbisa kukurumidza, kugadzikana kushanda, kunyanya mu-high-frequency inoshandisa seHDMI kana RF. Kusaenzana impedance pamwe nekuteedzera kunokonzera kutarisisa, kukuvadza kujeka kwechiratidzo uye kuyerera kwedata.
Kuchengeta impedance yakatsiga pane inoteedzera inodzivirira data uye chiratidzo chemhando.
Kufananidza kwakakodzera kunochengetedza simba uye kunoita kuti masekete ashande zviri nani.
Kudzidza impedance kuenzanisa kunobatsira iwe kuvaka maPCB akavimbika, kunyangwe emabasa akaomarara.
Matambudziko uye Mhinduro Mukuchengetedza Kudzora Impedance
Iko Impedance Inochinja Inoitika
Impedance shanduko inowanzoitika mune dzimwe nzvimbo dzePCB. Shanduko idzi dzinogona kukanganisa masaini uye kuita kwakaderera. Kuwana aya mavara ekutanga kunobatsira kuchengetedza impedance yakatsiga mukugadzira kwako.
Zvinhu zvakawanda zvinokonzera kuchinja uku. Material properties, senge dielectric constant (Dk) uye dissipation factor (Df), zvinhu zvikuru. Zvisina kuenzana Dk tsika dzinochinja mutsara impedance, nepo yakakwirira Df tsika dzinokonzera kurasikirwa kwechiratidzo. Trace size, senge upamhi uye ukobvu, zvakare inokanganisa impedance. Yakakura inoteedzera kushomeka kushomeka, asi hukuru husina kuenzana hunogona kugadzira kusawirirana.
Tafura iri pazasi inoratidza zvinokanganisa shanduko ye impedance:
Material Property | Iyo Inokanganisa Sei Impedance |
|---|---|
Dielectric Constant (Dk) | Shanduko mutsara impedance; tsika dzakatsiga dzinoderedza shanduko. |
Dissipation Factor (Df) | Kuderera kunoreva kurasikirwa kwechiratidzo uye kupisa. |
Coefficient of Thermal Expansion (CTE) | Shanduko dzinogona kusimbisa akawanda-zvinhu PCBs. |
Conductor Surface roughness | Nzvimbo dzakashata dzinowedzera kurasikirwa kwechiratidzo. |
Trace Dimensions | Yakafara inotsvaga kushomeka kwekushomeka uye kurasikirwa kwechiratidzo. |
Kuziva zvinhu izvi kunokubatsira kugadzira maPCB ari nani. Shandisa maturusi ekufananidza uye tora zvinhu zvakanaka kugadzirisa matambudziko aya.
Kushanda nePCB Vagadziri
Kushandira pamwe nePCB mugadziri wako kunobatsira kudzora impedance zvirinani. Vagadziri vane maturusi uye hunyanzvi hwekuvandudza dhizaini yako yekudzikama impedance. Govera zvaunoda, senge saizi yekutsvagisa uye ruzivo rwezvirongwa, kutanga.
Vagadziri vePCB vanogona kurudzira zvinhu zvakatsiga Dk uye pasi Df values. Izvi zvinhu zvinochengeta masaini zvakajeka uye kuderedza impedance shanduko. Vanogonawo kukurudzira nzira dzakaita senge-back-drilling vias kutema parasitic mhedzisiro.
Tip: Taura kazhinji nemugadziri wako wePCB kuti uone matambudziko nekukurumidza. Izvi zvinochengetedza nguva uye zvinoita kuti PCB yako ishande nemazvo.
Kutevedzera Magadzirirwo Mitemo
Kushandisa dhizaini mitemo kwakakosha kuchengetedza impedance yakatsiga. Mitemo yakaita seIPC-2141 gwara rekutsvaga saizi, nzvimbo, uye sarudzo dzezvinhu. Iyi mitemo inokubatsira iwe kuwana yakatsiga impedance paPCB yako.
Dhizaini mitemo zvakare ita shuwa kuti PCB yako inoshanda kune nekukurumidza masisitimu. Semuenzaniso, kutevera mitemo yeHDMI kana USB inovimbisa kuyerera kwechiratidzo chakanaka. Shandisa maturusi ekuenzanisa kuti uone kana dhizaini yako inosangana nemitemo iyi usati waigadzira.
Cherechedza: Ramba uine mitemo mitsva yekugadzira maPCB anoshanda kune zvinodiwa zvemazuva ano.
Nekugadzirisa shanduko yekuchinja, kushanda nevagadziri vePCB, uye nekutevera mitemo, unogona kuvaka maPCB anoshanda nemazvo uye anogara kwenguva refu.
Kuwana impedance kwakakosha pakuita kuti maPCB ashande nemazvo. Zvishandiso zvakaita semasimulator, macalculator epamhepo, uye mafomula anobatsira kuwana mhinduro chaidzo. Iwe unofanirwa kufunga nezve saizi yekutsvagisa, zvinhu, uye parasitic mhedzisiro kuchengetedza masaini akajeka. Kushanda nevagadziri vePCB uye kutevedzera dhizaini mitemo kunobatsirawo kudzora impedance zvirinani.
Tafura iri pazasi inoratidza maitiro akanaka e impedance anovandudza magadzirirwo ePCB:
Dzidzira | Batsirwa |
|---|---|
Smart Routing | Inocheka matambudziko echiratidzo uye inochengetedza maseketi akavimbika. |
Ground uye Power Layers | Inobatsira masaini kuti arambe akasimba uye inopa yakadzikama yekudzoka nzira. |
Inodzora impedance uye inomisa chiratidzo kusanganisa, inowedzera kuvimbika. |
Nokushandisa nzira idzi, unogona kugadzira maPCB anoshanda zvakanaka uye anozadzisa zvinodiwa nhasi.
FAQ
Ko inodzorwa impedance inorevei muPCB dhizaini?
Kudzora impedance inochengeta masaini akatsiga nekuchengetedza yakagadziriswa impedance. Inomisa matambudziko echiratidzo senge kukanganisa uye kufungisisa, kunyanya mumaseketi anokurumidza. Kuti uite izvi, gadzirisa hupamhi hwekutsvakisisa, nzvimbo, uye zvivakwa zvezvinhu zvakanyatsonaka.
Maturusi ekufananidza anobatsira sei kuverenga impedance?
Simulation zvishandiso tarisa impedance nekudzidza trace size, zvinhu, uye marongero. Ivo vanowana mismatches uye zviratidzo zviratidzo pamberi kugadzirwa. Zvishandiso zvakaita seSimbeor zvinopa mhedzisiro yekukurumidza dhizaini, kuchengetedza nguva uye kudzivirira kukanganisa.
Nei kuronda hupamhi kuchikosha kune impedance?
Trace wide inoshandura mafambiro anoita masaini. Yakafara inotsvaga yakadzika impedance, nepo yakatetepa ichisimudza. Kuverengera hupamhi hwekurudyi kunochengeta masaini akajeka uye kudzivirira kukanganiswa kusingaenderane.
Zvipembenene zvinogona kubviswa zvizere here?
Parasitic zvinhu hazvigone kubviswa zvachose, asi mhedzisiro yavo inogona kuderedzwa. Mapfupi anoteedzera, akatsetseka marongero, uye yakanaka ivhu yakadzika parasitic capacitance uye inductance, inovandudza chiratidzo chemhando.
Chii chinoita dielectric inogara ichiite mu impedance?
Iyo dielectric constant (Dk) inoratidza kuti chinhu chinochengeta sei simba. Yepamusoro Dk inodzikisira impedance, ukuwo Dk inosimudza. Kunhonga zvinhu zvine Dk yakagadzikana inochengetedza masiginecha akatsiga mumaseketi anokurumidza.
