Hauv txhua qhov kev hloov pauv hluav taws xob tsim, lub cev tsim ntawm PCB pawg thawj coj saib yog qhov txuas kawg. Yog tias tus qauv tsim tsis raug, PCB tuaj yeem cuam tshuam cov electromagnetic cuam tshuam ntau dhau thiab ua rau lub zog hluav taws xob ua haujlwm tsis ruaj khov. Cov hauv qab no yog cov teeb meem xav tau kev saib xyuas hauv txhua kauj ruam txheeb xyuas.

1. Tsim ntws los ntawm schematic mus rau PCB

Tsim kom muaj kev tivthaiv tsis muaj-“cov ntsiab lus tswv yim netlist -” tsim qhov chaw teeb tsa-” phau ntawv layout-” phau ntawv xov tooj – “tsim qauv pov thawj-” tshuaj xyuas -” CAM cov zis.

2. Kev teeb tsa Parameter

Qhov kev ncua deb ntawm cov xov hlau uas nyob ib sab yuav tsum muaj peev xwm ua tau raws li qhov yuav tsum tau muaj kev nyab xeeb hluav taws xob, thiab txhawm rau ua kom yooj yim rau kev khiav lag luam thiab kev tsim khoom, qhov kev ncua deb yuav tsum dav li ntau tau. Qhov sib nrug tsawg kawg nkaus yuav tsum yog tsawg kawg yog tsim nyog rau dais

voltage

Thaum cov kab hluav taws xob tsawg tsawg, qhov sib nrug ntawm cov kab teeb liab tuaj yeem tsim nyog ntxiv. Rau cov kab teeb liab uas muaj qib siab thiab qis, qhov sib nrug yuav tsum luv li sai tau thiab qhov sib nrug yuav tsum tau nce ntxiv. Feem ntau, qhov sib txuas ntawm qhov txuas yog teem rau 8mil. Qhov kev ncua deb ntawm ntug ntawm lub puab qhov ntawm lub ncoo thiab ntug ntawm lub rooj tsavxwm luam ntawv yuav tsum siab tshaj 1 hli, uas tuaj yeem zam qhov tsis xws ntawm lub ncoo thaum ua haujlwm. Thaum cov kab txuas nrog cov ntaub qhwv nyias nyias, kev sib txuas ntawm cov ntaub qhwv thiab cov kab yuav tsum tau tsim los ua ib qho kev poob. Qhov zoo ntawm qhov no yog cov ntaub qhwv tsis yooj yim rau tev, tab sis cov kab thiab cov ntaub qhwv tsis yooj yim txiav.

3. Txheej txheem txheej txheem

Xyaum tau ua pov thawj tias txawm

Kev Circuit Court

schematic tsim yog qhov tseeb, thiab cov ntawv luam tawm Circuit Board tsis tsim kom zoo.

hluav taws xob

Kev ntseeg siab ntawm cov cuab yeej siv tau cuam tshuam. Piv txwv li, yog tias ob txoj kab nyias nyias ntawm cov ntawv luam tawm nyob ze ua ke, lub teeb liab waveform yuav raug ncua thiab cov suab nrov yuav tshwm sim ntawm lub davhlau ya nyob twg ntawm cov kab sib kis. Qhov kev ua tau zoo poob qis, yog li thaum tsim lub rooj tsav xwm luam tawm, koj yuav tsum tau ua tib zoo saib xyuas cov txheej txheem kom raug. Txhua lub zog hloov hluav taws xob muaj plaub tam sim no

Voj:

Fais fab hloov AC Circuit Court

Output rectifier AC Circuit Court

Tawm tswv yim teeb liab qhov tam sim no lub voj

Output load tam sim no voj input voj

Tshaj qhov kwv yees li DC tam sim no mus rau lub tswv yim

capacitance

Rau kev them nyiaj, lub lim capacitor feem ntau ua haujlwm raws li kev siv hluav taws xob broadband; Zoo sib xws, cov zis lim capacitor kuj tseem siv los khaws cov khoom siv hluav taws xob siab los ntawm cov zis rectifier thiab tib lub sijhawm tshem tawm DC lub zog ntawm cov zis load voj. Yog li ntawd, cov terminals ntawm input thiab output lim capacitors yog ib qho tseem ceeb heev. Lub input thiab output tam sim no loops yuav tsum tsuas yog txuas nrog lub hwj chim mov los ntawm lub terminals ntawm lub lim capacitor feem; Yog hais tias qhov kev sib txuas ntawm lub input / output voj thiab lub hwj chim hloov / rectifier voj tsis tuaj yeem txuas nrog lub capacitor Lub davhlau ya nyob twg txuas ncaj qha, thiab AC lub zog yuav raug xa mus rau ib puag ncig los ntawm cov tswv yim lossis cov zis lim capacitor.

Lub AC Circuit Court ntawm lub hwj chim hloov thiab AC Circuit Court ntawm lub rectifier muaj high-amplitude trapezoidal tam sim no. Lub harmonic Cheebtsam ntawm cov tam sim no yog siab heev. Qhov zaus yog ntau dua li qhov tseem ceeb ntawm qhov hloov pauv. Qhov siab tshaj plaws amplitude tuaj yeem siab li 5 npaug ntawm qhov amplitude ntawm qhov txuas txuas ntxiv / tso tawm DC tam sim no. Lub sijhawm hloov pauv feem ntau yog Txog 50ns. Ob lub voj voog no feem ntau cuam tshuam rau electromagnetic cuam tshuam, yog li cov AC loops yuav tsum tau muab tso ua ntej lwm cov ntawv luam tawm hauv cov khoom siv hluav taws xob. Peb lub ntsiab tseem ceeb ntawm txhua lub voj yog lim capacitors, fais fab hloov lossis rectifiers,

ntxias

transformer

Yuav tsum tau muab tso rau ntawm ib sab, kho qhov chaw ntawm cov khoom ua kom txoj kev tam sim no ntawm lawv luv li sai tau.

Txoj hauv kev zoo tshaj plaws los tsim kom muaj kev hloov hluav taws xob hloov hluav taws xob zoo ib yam li nws cov qauv hluav taws xob. Txoj kev tsim qauv zoo tshaj plaws yog raws li hauv qab no:

1. Tso lub transformer

2. Tsim lub zog hloov tam sim no voj

3. Tsim cov zis rectifier tam sim no voj

4. Tswj Circuit Court txuas nrog AC fais fab Circuit Court

Tsim input tam sim no qhov chaw voj thiab input

lim

Thaum tsim cov zis load voj thiab tso zis lim raws li qhov ua haujlwm ntawm lub voj voog, thaum tso tawm tag nrho cov khoom ntawm lub voj voog, cov hauv qab no yuav tsum tau ua raws li:

Thawj qhov yuav tsum xav txog yog qhov loj ntawm PCB. Thaum lub PCB loj dhau lawm, cov kab luam tawm yuav ntev, qhov impedance yuav nce, lub peev xwm los tiv thaiv lub suab nrov yuav txo, thiab tus nqi yuav nce; yog tias PCB loj me me dhau lawm, cov cua kub dissipation yuav tsis zoo, thiab cov kab uas nyob ib sab yuav cuam tshuam yooj yim. Qhov zoo tshaj plaws zoo ntawm lub rooj tsav xwm Circuit Court yog cov duab plaub, nrog rau qhov sib piv ntawm 3: 2 lossis 4: 3. Cov khoom siv nyob rau ntawm ntug ntawm lub rooj tsavxwm Circuit Court feem ntau tsis pub tsawg tshaj 2 hli ntawm ntug ntawm lub rooj tsavxwm. Thaum muab cov khoom, xav txog yav tom ntej soldering, tsis dhau ntom Siv cov ntsiab lus tseem ceeb ntawm txhua qhov chaw ua haujlwm raws li qhov chaw nruab nrab thiab nteg tawm ib ncig ntawm nws. Lub Cheebtsam yuav tsum sib npaug, huv si thiab compactly teem rau ntawm PCB, txo thiab txo cov kev coj thiab kev sib txuas ntawm cov khoom, thiab lub decoupling capacitor yuav tsum nyob ze li sai tau rau VCC ntawm lub cuab yeej. Circuits uas ua hauj lwm ntawm high zaus yuav tsum xav txog cov khoom. Distribution parameters. Feem ntau, lub voj voog yuav tsum tau teem caij ua ke kom ntau li ntau tau. Nyob rau hauv txoj kev no, nws tsis yog tsuas yog zoo nkauj, tab sis kuj yooj yim rau nruab thiab solder, thiab yooj yim rau loj tsim. Teem txoj hauj lwm ntawm txhua qhov kev ua haujlwm hauv Circuit Court raws li lub voj voog khiav, kom qhov kev teeb tsa tau yooj yim rau cov teeb liab ntws, thiab cov teeb liab zoo ib yam li qhov ua tau. Thawj lub hauv paus ntsiab lus ntawm layout yog los xyuas kom meej qhov kev sib txuas ntawm cov xov hlau. Ua tib zoo saib xyuas qhov kev sib txuas ntawm cov ya ya ua thaum txav lub cuab yeej, thiab muab cov khoom sib txuas ua ke kom txo tau lub voj voog kom ntau li ntau tau txhawm rau txhawm rau cuam tshuam cov hluav taws xob cuam tshuam ntawm kev hloov hluav taws xob.

4. Thaiv

Cov khoom siv hluav taws xob hloov pauv muaj cov teeb liab siab. Txhua txoj kab luam tawm ntawm PCB tuaj yeem ua haujlwm ua tus kav hlau txais xov. Qhov ntev thiab dav ntawm cov ntawv luam tawm yuav cuam tshuam rau nws cov impedance thiab inductance, yog li cuam tshuam rau cov lus teb zaus. Txawm tias cov kab luam tawm uas dhau DC cov teeb liab tuaj yeem ua ob peb lub xov tooj cua zaus ntawm cov kab ntawv uas nyob ib sab thiab ua rau muaj teeb meem hauv Circuit Court (txawm tias hluav taws xob cuam tshuam dua). Yog li ntawd, tag nrho cov ntawv luam tawm uas dhau AC tam sim no yuav tsum tau tsim kom luv thiab dav li sai tau, uas txhais tau hais tias tag nrho cov khoom txuas nrog cov kab luam tawm thiab lwm cov kab hluav taws xob yuav tsum tau muab tso ze heev.

Qhov ntev ntawm cov kab luam tawm yog proportional rau nws inductance thiab impedance, thiab qhov dav yog inversely proportional rau inductance thiab impedance ntawm cov ntawv luam. Qhov ntev qhia txog lub wavelength ntawm cov kab luam tawm cov lus teb. Qhov ntev ntawm qhov ntev, qhov tsawg zaus ntawm cov kab ntawv luam tawm tuaj yeem xa thiab tau txais hluav taws xob nthwv dej, thiab nws tuaj yeem tawg ntau lub zog hauv xov tooj cua. Raws li qhov loj ntawm cov ntawv luam tawm Circuit Board tam sim no, sim ua kom qhov dav ntawm txoj kab hluav taws xob kom txo tau lub voj voog tsis kam. Nyob rau tib lub sijhawm, ua kom cov kev taw qhia ntawm cov kab hluav taws xob thiab cov kab hauv av sib haum nrog cov kev taw qhia ntawm cov tam sim no, uas yuav pab txhim kho lub peev xwm los tiv thaiv lub suab nrov. Grounding yog cov ceg hauv qab ntawm plaub lub voj voog tam sim no ntawm lub zog hloov hluav taws xob. Nws plays lub luag haujlwm tseem ceeb raws li cov ntsiab lus siv rau hauv Circuit Court, thiab nws yog ib txoj hauv kev tseem ceeb los tswj kev cuam tshuam. Yog li ntawd, qhov chaw ntawm lub grounding hlau yuav tsum tau ua tib zoo xav txog nyob rau hauv lub layout. Kev sib xyaw ntau yam hauv av yuav ua rau lub zog tsis ruaj khov.