Daim Ntawv Luam Tawm Circuit Board (PCB), tseem hu ua Printed Circuit Board (PCB), yog siv los txuas thiab ua haujlwm hauv cov khoom siv hluav taws xob thiab yog ib feem tseem ceeb ntawm kev tsim hluav taws xob Circuit Court. Kab lus no yuav qhia txog cov kev cai yooj yim ntawm PCB layout thiab xaim.

Qhia meej cov kev cai yooj yim ntawm PCB board layout thiab xaim

Cov cai yooj yim ntawm cov txheej txheem txheej txheem

1. Raws li kev teeb tsa ntawm cov qauv hluav taws xob, kev cuam tshuam hauv Circuit Court kom ua tiav tib lub luag haujlwm yog hu ua module, cov khoom siv hauv Circuit Circuit module yuav tsum tau txais txoj cai ntawm kev mloog zoo nyob ze, thiab cov digital Circuit thiab analog Circuit Court yuav tsum sib cais;

2. Cov khoom siv, cov khoom siv thiab cov ntsia hlau yuav tsum tsis txhob muab tso rau hauv 3.5 hli (rau M2.5) thiab 4 hli (rau M3) nyob ib ncig ntawm lub qhov uas tsis muaj qhov txuas xws li qhov chaw qhov chaw thiab cov qauv qhov nyob hauv 1.27 hli;

3. Kab rov tav tsis kam, inductor (plug-in), electrolytic capacitor thiab lwm yam khoom nyob rau hauv daim ntaub qhov, kom tsis txhob yoj soldering qhov thiab tiv thaiv lub plhaub luv luv Circuit Court;

4. Sab nraud ntawm cov khoom siv yog 5 hli ntawm ntug ntawm lub phaj;

5. Qhov kev ncua deb ntawm sab nraud ntawm lub ncoo ntawm lub mounting lub ntsiab thiab sab nraud ntawm cov khoom uas nyob ib sab yog ntau dua 2 hli;

6. Cov khoom siv plhaub hlau thiab cov khoom siv hlau (shielding lub thawv, thiab lwm yam) tsis tuaj yeem kov lwm yam khoom, tsis tuaj yeem nyob ze rau ntawm cov ntawv luam tawm, cov ntaub qhwv, qhov sib nrug yuav tsum ntau dua 2 hli. Qhov luaj li cas ntawm qhov chaw, qhov fastener mounting qhov, elliptic qhov thiab lwm yam square qhov nyob rau hauv lub phaj yog ntau tshaj 3 hli los ntawm lub phaj sab;

7. Cov khoom cua sov yuav tsum tsis txhob nyob ze rau ntawm cov xov hlau thiab cov khoom thermal; Cov khoom siv hluav taws kub kub yuav tsum tau muab sib npaug;

8. Lub qhov (socket) lub hwj chim yuav tsum tau teem ib ncig ntawm lub rooj tsavxwm luam tawm kom deb li deb tau, thiab cov khoom siv hluav taws xob ntawm lub qhov hluav taws xob thiab lub busbar txuas nrog nws yuav tsum tau teem rau tib sab. Tshwj xeeb, tsis txhob tso lub qhov hluav taws xob thiab lwm yam kev sib txuas ntawm cov khoom sib txuas los pab txhawb kev sib txuas ntawm cov sockets thiab cov khoom sib txuas thiab tsim thiab xaim hluav taws xob cables. Qhov sib nrug ntawm lub qhov hluav taws xob thiab cov khoom siv vuam yuav tsum raug txiav txim siab los pab txhawb kev ntxig thiab tshem tawm cov ntsaws ntsaws;

9. Txheej txheem ntawm lwm yam khoom siv:

Txhua lub Cheebtsam hauv IC yuav tsum tau koom ua ib leeg ib leeg, thiab cov cim polarity ntawm cov cheebtsam sab nrauv yuav tsum meej. Cov cim polarity ntawm tib lub board luam ntawv yuav tsum tsis txhob ntau tshaj ob qho kev qhia. Thaum ob lub ntsiab lus tshwm sim, ob qho kev qhia yuav tsum yog perpendicular rau ib leeg.

10, tus nto xov yuav tsum kom ntom, thaum lub ceev txawv yog ib yam nkaus thiab loj yuav tsum tau sau nrog mesh tooj liab ntawv ci, daim phiaj yog ntau tshaj 8mil (los yog 0.2 hli);

11, cov ntaub qhwv lub ntsej muag tsis tuaj yeem muaj los ntawm qhov, kom tsis txhob poob ntawm cov tshuaj nplaum uas ua rau cov khoom siv vuam virtual. Cov kab teeb liab tseem ceeb tsis pub dhau los ntawm lub qhov (socket) ko taw;

12, patch unilateral alignment, zoo ib yam li tus cwj pwm coj, zoo ib yam ntim kev coj;

13. Cov khoom siv Polar yuav tsum tau cim rau hauv tib txoj kev kom deb li deb tau ntawm tib lub rooj tsavxwm.

Thib ob, cov cai ntawm kev sib txuas

1. Kos qhov thaiv kab hauv cheeb tsam ≤1mm los ntawm PCB board ntug, thiab nyob rau hauv 1mm nyob ib ncig ntawm lub mounting qhov, thiab txwv tsis pub xaim;

2. Cov kab hluav taws xob kom dav li ntau tau, yuav tsum tsis pub tsawg tshaj 18mil; Teeb liab kab dav yuav tsum tsis pub tsawg tshaj 12mil; CPU cov kab nkag thiab tawm yuav tsum tsis pub tsawg dua 10mil (lossis 8mil); Kab sib nrug tsis pub tsawg tshaj 10mil;

3. Qhov qhov ib txwm tsis tsawg dua 30mil;

4. Ob chav kab ntxig: ncoo 60mil, aperture 40mil;

1/4W tsis kam: 51 * 55mil (0805 daim ntawv); Ncaj ncaj ncoo ncoo 62mil, aperture 42mil;

Tsis-polar capacitor: 51 * 55mil (0805 daim ntawv); Ncaj ncaj ncoo ncoo 50mil, aperture 28mil;

5. Nco ntsoov tias fais fab cables thiab av cables yuav tsum yog radial kom deb li deb tau, thiab cov teeb liab cables yuav tsum tsis txhob looped.

Yuav ua li cas txhawm rau txhim kho kev muaj peev xwm tiv thaiv kev cuam tshuam thiab kev sib nqus hluav taws xob?

Yuav ua li cas txhawm rau txhim kho kev muaj peev xwm tiv thaiv kev cuam tshuam thiab hluav taws xob sib xws thaum tsim cov khoom siv hluav taws xob nrog lub khoos phis tawj?

1. Qee qhov hauv qab no yuav tsum tau them nyiaj tshwj xeeb rau kev cuam tshuam los tiv thaiv hluav taws xob:

(1) microcontroller moos zaus tshwj xeeb yog siab, lub voj voog tsheb npav tshwj xeeb yog ceev ceev.

(2) Lub kaw lus muaj lub zog hluav taws xob, lub zog tsav tam sim no, xws li cov hluav taws xob tsim hluav taws xob, hloov hluav taws xob siab, thiab lwm yam.

(3) system nrog tsis muaj zog analog teeb liab Circuit Court thiab siab precision A / D hloov dua siab tshiab Circuit Court.

2. Cov kev ntsuas hauv qab no raug coj los ua kom muaj peev xwm tiv thaiv hluav taws xob cuam tshuam ntawm lub cev:

(1) Xaiv microcontroller nrog tsawg zaus:

Lub microcontroller nrog lub sijhawm qis sab nraud tuaj yeem txo cov suab nrov thiab txhim kho lub peev xwm tiv thaiv kev cuam tshuam ntawm lub cev. Square yoj thiab sine yoj nrog tib zaus, lub siab zaus ntawm cov yoj square yog ntau dua sine yoj. Txawm hais tias lub amplitude ntawm lub siab zaus feem ntawm lub square nthwv dej yog me dua li ntawm lub hauv paus nthwv dej, qhov ntau dua qhov zaus, nws yooj yim dua rau emit thiab ua lub suab nrov. Lub suab nrov nrov tshaj plaws uas tsim los ntawm microcontroller yog kwv yees li 3 zaug ntawm lub moos zaus.

(2) Txo qhov tsis sib xws hauv cov teeb liab kis

Microcontrollers yog tsim los ntawm high-speed CMOS technology. Static input tam sim no teeb liab input ntawm li 1 ma, nyob ib ncig ntawm kaum pf nyob rau hauv lub input capacitance, siab input impedance, kev kub ceev CMOS Circuit Court outputs yog haum rau load peev xwm, uas yog tus nqi tso zis ntau, qhov tso zis kawg ntawm lub qhov rooj los ntawm ib tug ntev heev lead. mus rau cov tswv yim siab, cov teeb meem cuam tshuam txog kev cuam tshuam kev cuam tshuam loj heev, nws yuav ua rau lub teeb liab cuam tshuam, Ua kom lub suab nrov nrov. Thaum Tpd “Tr”, nws dhau los ua qhov teeb meem ntawm cov kab sib txuas, yuav tsum xav txog qhov teeb meem kev xav, impedance txuam thiab lwm yam.

Lub sij hawm ncua sij hawm ntawm lub teeb liab ntawm lub rooj tsavxwm luam tawm yog cuam tshuam nrog cov yam ntxwv impedance ntawm cov hlau lead, uas yog, mus rau dielectric tas li ntawm cov ntaub ntawv luam tawm. Cov teeb liab tuaj yeem kwv yees kwv yees mus ncig ntawm 1/3 thiab 1/2 qhov ceev ntawm lub teeb hla PCB coj. Lub Tr (tus qauv ncua sij hawm) ntawm cov xov tooj logic feem ntau siv hauv cov tshuab ua los ntawm microcontrollers yog nyob nruab nrab ntawm 3 thiab 18ns.

Ntawm lub rooj tsavxwm luam tawm, lub teeb liab dhau los ntawm 7W resistor thiab 25cm txhuas, nrog rau kev ncua hauv online ntawm kwv yees li 4 mus rau 20ns. Ntawd yog hais tias, lub teeb liab ntawm cov kab luam tawm ua kom luv li sai tau, qhov ntev tshaj plaws yuav tsum tsis pub tshaj 25cm. Thiab tus naj npawb ntawm qhov yuav tsum tsawg li tsawg tau, nyiam dua tsis pub ntau tshaj 2.

Thaum lub teeb liab nce lub sij hawm sai dua lub teeb liab ncua sij hawm, ceev hluav taws xob siv tau. Hauv qhov no, qhov sib piv impedance ntawm cov kab sib txuas yuav tsum tau txiav txim siab. Rau cov teeb liab kis tau tus mob ntawm kev sib koom ua ke ntawm lub rooj tsav xwm PRINTED, Td Trd yuav tsum zam. Qhov loj dua lub rooj tsav xwm luam tawm, qhov ceev ntawm lub kaw lus tsis tuaj yeem ua kom nrawm.