Txawm tias luam tawm hauv Circuit Court board (PCB) thaiv kev ua lub luag haujlwm tseem ceeb hauv high-speed circuits, feem ntau tsuas yog ib qho ntawm cov kauj ruam kawg hauv cov txheej txheem tsim hluav taws xob. Muaj ntau ntau yam ntawm high-speed PCB thaiv. Muaj ntau ntau cov ntaub ntawv ntawm lub ncauj lus no rau kev siv. Kab lus no feem ntau yog tham txog cov teeb meem ntawm kev xaim hluav taws xob ntawm kev kub ceev los ntawm qhov kev pom zoo. Lub hom phiaj tseem ceeb yog los pab cov neeg siv tshiab kom xyuam xim rau ntau yam teeb meem sib txawv uas yuav tsum tau xav txog thaum tsim kev kub ceev Circuit Court PCB thaiv. Lwm lub hom phiaj yog muab cov ntaub ntawv tshuaj xyuas rau cov neeg siv khoom uas tsis tau kov PCB thaiv ib ntus. Txwv tsis pub los ntawm tsab xov xwm layout, tsab xov xwm no tsis tuaj yeem tham txog tag nrho cov teeb meem hauv kev nthuav dav, tab sis tsab xov xwm yuav tham txog cov ntsiab lus tseem ceeb uas muaj txiaj ntsig zoo tshaj plaws rau kev txhim kho kev ua haujlwm hauv Circuit Court, txo lub sijhawm tsim, thiab txuag lub sijhawm hloov kho.

Txawm hais tias tsab xov xwm no tsom mus rau circuits ntsig txog kev ua haujlwm siab ceev amplifiers, cov teeb meem thiab cov hau kev tau tham hauv tsab xov xwm no feem ntau siv tau rau kev xaim siv nyob rau hauv feem ntau lwm cov high-speed analog circuits. Thaum lub chaw ua haujlwm amplifier ua haujlwm nyob rau hauv lub xov tooj cua ntau zaus (RF) zaus, kev ua haujlwm ntawm lub voj voog feem ntau nyob ntawm PCB layout. Kev tsim hluav taws xob ua haujlwm siab uas zoo nkaus li zoo ntawm cov duab kos tuaj yeem tau txais kev ua haujlwm zoo tib yam yog tias nws cuam tshuam los ntawm kev tsis saib xyuas thiab tsis saib xyuas. Yog li ntawd, kev txiav txim siab ua ntej thiab ua tib zoo saib xyuas cov ntsiab lus tseem ceeb thaum lub sij hawm tag nrho cov txheej txheem xaim yuav pab kom ntseeg tau tias qhov kev xav tau ntawm Circuit Court. Schematic Txawm hais tias ib tug zoo schematic tsis lav ib tug zoo xaim, ib tug zoo xov pib nrog ib tug zoo schematic. Thaum kos duab schematic, peb yuav tsum ua tib zoo xav, thiab peb yuav tsum xav txog lub teeb liab kev taw qhia ntawm tag nrho cov circuits. Yog hais tias muaj ib txwm thiab ruaj khov teeb liab ntws los ntawm sab laug mus rau sab xis nyob rau hauv lub schematic, ces yuav tsum muaj ib tug sib npaug zoo teeb liab ntws ntawm lub PCB. Muab cov ntaub ntawv muaj txiaj ntsig ntau li ntau tau ntawm cov phiaj xwm. Nyob rau hauv txoj kev no, txawm tias qee qhov teeb meem tsis tuaj yeem daws tau los ntawm tus kws tsim hluav taws xob tsim hluav taws xob, cov neeg siv khoom kuj tuaj yeem nrhiav lwm txoj hauv kev los pab daws cov teeb meem hauv Circuit Court. In addition to the common reference identifiers, power consumption, and error tolerance, what other information should be given in the schematic? Cov hauv qab no yuav muab qee cov lus qhia los hloov cov schematics zoo tib yam rau hauv qhov zoo tshaj plaws schematics. Ntxiv waveforms, txhua yam ntaub ntawv hais txog lub casing, ntev ntawm cov kab luam tawm, thiab qhov chaw dawb paug; qhia tias cov khoom twg yuav tsum tau muab tso rau ntawm PCB; muab cov ntaub ntawv hloov kho, cov nqi ntawm cov khoom siv, cov ntaub ntawv kub dissipation, tswj impedance cov kab luam tawm, cov lus pom, thiab luv luv Circuit Court piav qhia thiab lwm yam ntaub ntawv, thiab lwm yam. Tsis txhob ntseeg tias yog tias koj tsis tsim cov kab hluav taws xob rau koj tus kheej, koj yuav tsum tso sijhawm txaus los ua tib zoo xyuas tus tsim ntawm tus neeg txuas. Kev tiv thaiv me me tuaj yeem tsim nyog ib puas npaug ntawm kev kho. Tsis txhob cia siab tias tus neeg xa xov yuav nkag siab txog tus tsim lub tswv yim. Cov kev xav thaum ntxov thiab kev taw qhia hauv cov txheej txheem kev tsim cov kab hluav taws xob yog qhov tseem ceeb tshaj plaws. Cov ntaub ntawv ntau ntxiv uas tuaj yeem muab tau, thiab ntau qhov kev koom tes hauv tag nrho cov txheej txheem xaim, qhov ua tau zoo ntawm PCB yuav zoo dua. Teem lub ntsiab lus ua tiav rau tus kws tsim hluav taws xob tsim hluav taws xob, thiab tshawb xyuas sai sai raws li qhov xav tau ntawm kev xa xov txuas ntxiv. Txoj kev kaw lub voj no tuaj yeem tiv thaiv kev xaim ntawm kev yuam kev, yog li txo qhov muaj peev xwm rov tsim dua. Cov lus qhia uas yuav tsum tau muab rau tus kws tsim hluav taws xob muaj xws li: cov lus piav qhia luv luv ntawm kev ua haujlwm hauv Circuit Court, daim duab kos duab ntawm PCB qhia txog qhov chaw nkag thiab tso zis, cov ntaub ntawv PCB stacking (piv txwv li, lub rooj tsavxwm tuab npaum li cas, muaj pes tsawg txheej txheej. muaj, cov ncauj lus kom ntxaws txog txhua lub teeb liab txheej thiab hauv av dav hlau: kev siv hluav taws xob, av xaim, analog teeb liab, cov teeb liab digital thiab RF teeb liab, thiab lwm yam); uas cov cim qhia yuav tsum tau rau txhua txheej; qhov kev tso kawm ntawm cov khoom tseem ceeb yog yuav tsum tau; qhov tseeb qhov chaw ntawm bypass Cheebtsam; cov kab luam tawm no tseem ceeb; cov kab twg yuav tsum tau tswj cov kab impedance luam tawm; Cov kab twg yuav tsum sib phim qhov ntev; qhov loj ntawm cov khoom; cov kab uas luam tawm yuav tsum nyob deb ntawm ib leeg (los yog ze rau); cov kab twg yuav tsum nyob deb ntawm ib leeg (los yog ze rau); uas cov khoom yuav tsum nyob deb ntawm ib leeg (los yog ze rau); cov khoom twg yuav tsum tau muab tso rau ntawm PCB Saum toj no, cov khoom twg tau muab tso rau hauv qab no. Cov kws tsim hluav taws xob tsim hluav taws xob tsis tuaj yeem yws txog cov ntaub ntawv ntau dhau uas yuav tsum tau muab. There is never too much information. Tom ntej no, kuv yuav qhia txog kev kawm paub: txog 10 xyoo dhau los, kuv tau ua ib txoj haujlwm tsim ntawm ntau txheej txheej mount Circuit Court board nrog cov khoom ntawm ob sab ntawm lub rooj tsavxwm. Siv ntau cov ntsia hlau los txhim kho lub rooj tsavxwm hauv lub tsev kub-plated aluminium (vim tias muaj cov qauv nruj heev rau kev poob siab). Cov pins uas muab kev tsis ncaj ncees feedthrough dhau los ntawm lub rooj tsavxwm. Tus pin no txuas nrog PCB los ntawm cov xov hlau. Qhov no yog ib qho khoom siv nyuaj heev. Some components on the board are used for test setting (SAT). Tab sis tus engineer tau qhia meej meej qhov chaw ntawm cov khoom no. Cov khoom no nyob qhov twg? Tsuas yog hauv qab lub rooj tsavxwm. Thaum cov khoom engineers thiab cov kws kho mob yuav tsum tau disassemble tag nrho cov cuab yeej thiab reassemble lawv tom qab ua tiav cov kev teeb tsa, cov txheej txheem no yuav nyuaj heev. Therefore, such errors must be minimized as much as possible. Position is just like in the PCB, position is everything. Qhov twg yuav muab ib lub voj voog rau ntawm PCB, qhov twg yuav tsum nruab nws cov khoom siv hluav taws xob tshwj xeeb, thiab lwm cov kab hluav taws xob uas nyob ib sab yog dab tsi, txhua qhov tseem ceeb heev. Feem ntau, cov hauj lwm ntawm cov tswv yim, tso zis, thiab lub hwj chim mov yog predetermined, tab sis cov circuits ntawm lawv yuav tsum muaj tswv yim. Qhov no yog vim li cas kev saib xyuas cov ntaub ntawv xov tooj yuav muaj feem cuam tshuam rau kev tsim khoom tom ntej. Pib nrog qhov chaw ntawm cov khoom tseem ceeb thiab xav txog qhov tshwj xeeb Circuit Court thiab tag nrho PCB. Kev qhia txog qhov chaw ntawm cov khoom tseem ceeb thiab txoj hauv kev ntawm lub teeb liab los ntawm qhov pib pab xyuas kom meej tias tus qauv tsim ua tiav cov hom phiaj ua haujlwm. Tau txais kev tsim qauv zoo ib zaug tuaj yeem txo cov nqi thiab siab, thiab yog li ua kom luv luv ntawm txoj kev loj hlob. Bypass fais fab mov Teeb lub bypass fais fab mov ntawm lub hwj chim kawg ntawm lub amplifier kom txo cov suab nrov yog ib qho tseem ceeb heev kev taw qhia nyob rau hauv lub PCB tsim txheej txheem, nrog rau cov high-speed ua hauj lwm amplifiers thiab lwm yam high-ceev circuits. Muaj ob txoj hauv kev teeb tsa rau kev hla kev ua haujlwm siab ceev amplifiers. * Txoj kev no ntawm grounding lub hwj huam mov davhlau ya nyob twg yog qhov zoo tshaj plaws nyob rau hauv feem ntau, siv ntau yam parallel capacitors ncaj qha rau hauv av lub hwj chim mov pin ntawm lub lag luam amplifier. Feem ntau hais lus, ob qho tib si capacitor yog txaus, tab sis ntxiv cov khoom sib xyaw ua ke tuaj yeem ua rau muaj txiaj ntsig rau qee lub voj voog. Kev sib txuas ntawm cov capacitors nrog qhov sib txawv ntawm qhov muaj peev xwm pab tau kom paub tseeb tias lub hwj huam mov tus pin muaj qhov tsis tshua muaj hluav taws xob hloov tam sim no (AC) impedance tshaj qhov dav zaus band. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog nyob rau ntawm qhov attenuation zaus ntawm kev ua haujlwm amplifier fais fab mov tsis lees txais qhov piv (PSR). Qhov no capacitor pab them nyiaj rau qhov txo qis PSR ntawm lub amplifier. Kev tuav txoj hauv kev qis-impedance hauv ntau qhov ntau ntawm kaum-octave yuav pab xyuas kom meej tias cov suab nrov tsis zoo tuaj yeem nkag mus rau op amp. (Daim duab 1) qhia txog qhov zoo ntawm kev siv ntau lub capacitors nyob rau hauv parallel. Ntawm qhov tsawg zaus, cov capacitors loj muab txoj hauv kev uas tsis muaj impedance. Tab sis thaum lub zaus nce mus txog lawv tus kheej resonant zaus, lub compatibility ntawm lub capacitor yuav tsis muaj zog thiab maj mam tshwm inductive.