Kev simulator

Shenzhen Shenchuang Hi-tech Electronics Co., Ltd (SChitec) yog lub tuam txhab ua haujlwm siab uas tshwj xeeb hauv xov tooj accessories ntau lawm thiab muag khoom. Peb cov khoom tseem ceeb muaj xws li kev mus ncig, chargers tsheb, USB cables, fais fab nyiaj hauv tuam txhab nyiaj thiab lwm yam khoom siv digital.Tag nrho cov khoom muaj kev nyab xeeb thiab txhim khu kev qha, nrog cov cim styles.products dhau daim ntawv pov thawj xws li CE, FCC, ROHS, UL, PSE, C-Tick, thiab lwm yam. , Yog tias koj txaus siab rau, koj tuaj yeem tiv tauj ceo@schitec.com ncaj qha.

Nyob ruaj ntseg nrog SChitec

Kev simulator

Kuaj nrog OP AMP. Lub tswvyim ntawm "Virtual Earth" los ntawm point "a" yog raws li nram no:

Ix=Iref

∴Rx {{0}} Vs/ V0*Rref

Vs thiab rref yog excitation teeb liab qhov chaw thiab ntsuas ntsuas kev tiv thaiv feem. Yog ntsuas V0, RX tuaj yeem suav.

Yog hais tias Rx yuav tsum tau ntsuas yog capacitance thiab inductance, ces lub vs AC teeb liab qhov chaw, Rx yog impedance daim ntawv, thiab C los yog l kuj xam.

1.2 kev ruaj ntseg

Cov qauv kev sim saum toj no yog rau cov khoom siv ywj pheej, tab sis cov khoom siv hauv qhov tseeb Circuit Court tau txuas thiab cuam tshuam nrog ib leeg, yog li ntawd IX 笽 ref yuav tsum raug cais tawm thaum lub sijhawm kuaj. Kev rho tawm yog qhov thev naus laus zis ntawm kev sim online.

Nyob rau hauv lub sab sauv Circuit Court, vim hais tias ntawm kev sib txuas shunt ntawm R1 thiab R2, qhov sib npaug ntawm IX 笽 ref, RX=vs / V0 * rref tsis siv tau. Nyob rau hauv qhov kev xeem, tsuav yog G thiab F nyob rau tib lub peev xwm, tsis muaj tam sim no ntws los ntawm R2, thiab tseem muaj qhov sib npaug ntawm IX=Iref, RX tseem tsis hloov. Thaum G point yog grounded, kev rho tawm tuaj yeem pom tau vim tias f point yog zoo li hauv av thiab lub peev xwm ntawm ob lub ntsiab lus sib npaug. Hauv kev xyaum, G thiab F yog equipotential los ntawm kev sib cais ua haujlwm amplifier. ICT tester tuaj yeem muab ntau cov ntsiab lus cais tawm kom tshem tawm qhov cuam tshuam ntawm peripheral circuit ntawm kev xeem.

1.2 IC Test

Rau Digital IC, siv vector test. Vector test zoo ib yam li qhov ntsuas qhov tseeb lub rooj, uas zoo siab rau cov tswv yim vector, ntsuas cov zis vector, thiab txiav txim siab qhov zoo ntawm cov cuab yeej los ntawm qhov tseeb logic function test.

Piv txwv li: Kev xeem ntawm NAND rooj vag

Rau kev ntsuam xyuas ntawm Analog IC, cov zis sib thooj tuaj yeem ntsuas raws li qhov tseeb muaj nuj nqi excitation voltage thiab tam sim no ntawm IC, uas yog suav hais tias yog qhov kev sim ua haujlwm.

Tsis yog vector test

Nrog rau kev tsim cov cuab yeej tsim khoom niaj hnub no thiab kev siv VLSI, feem ntau siv sijhawm ntau los sau cov vector test program ntawm cov khoom siv, xws li 80386 test program, uas yuav siv sijhawm ze li ib nrab xyoo rau tus kws tshaj lij programmer. Nrog rau kev siv ntau ntawm SMT cov cuab yeej, qhov tshwm sim txhaum ntawm qhib Circuit Court ntawm cov cuab yeej pins ua qhov tseem ceeb. Vim li no, Teradyne tau tshaj tawm qhov tsis yog vector xeem thev naus laus zis ntawm Xpress, uas yog qhia los ntawm Multiscan; GenRad.

2.1 delta scan analog junction xeem tshuab

Deltascan siv ESD kev tiv thaiv lossis cov kab mob parasitic uas yuav luag txhua tus pins ntawm cov khoom siv digital thiab feem ntau ntawm cov pins ntawm cov teeb liab sib xyaw los ntsuas DC tam sim no ntawm tus pin ywj siab khub ntawm cov khoom siv kuaj. Thaum lub hwj chim ntawm lub rooj tsavxwm raug txiav tawm, qhov sib npaug ntawm ob lub pins ntawm lub cuab yeej yog pom hauv daim duab hauv qab no.

1.Ntxiv qhov hluav taws xob tsis zoo rau hauv av ntawm tus pin a, thiab tam sim no ia ntws los ntawm kev sib tw pem hauv ntej diode ntawm tus pin a. Ntsuas qhov tam sim no ntawm tus pin a.

2 tswj qhov hluav taws xob ntawm tus pin A, ntxiv qhov tsis zoo siab dua rau tus pin B, thiab IB tam sim no ntws los ntawm kev sib tw rau pem hauv ntej diode ntawm tus pin B. Qhov tam sim no IA raug txo vim qhov kev sib koom tam sim no nyob rau hauv cov txheej txheem substrate tsis kam los ntawm tus pin a thiab pin B to ground.

3 ntsuas qhov tam sim no ia los ntawm tus pin ib dua. Yog tias ia tsis hloov (delta) thaum qhov hluav taws xob siv rau tus pin B, yuav tsum muaj teeb meem kev sib txuas.

Deltascan software synthesizes cov txiaj ntsig tau txais los ntawm ntau qhov ua tau tus pin khub ntawm lub cuab yeej, kom tau txais kev kuaj pom tseeb. Lub teeb liab tus pin, fais fab mov thiab grounding tus pin, thiab substrate tag nrho cov koom nyob rau hauv deltascan xeem, uas txhais tau hais tias ntxiv nrog rau tus pin disconnection, deltascan kuj tseem tuaj yeem kuaj xyuas cov khoom tsis raug xws li cov cuab yeej ploj, thim rov qab, thiab kev sib txuas ntawm cov xov hlau.

GenRad hom kev xeem hu ua junction Xpress. Nws kuj tseem siv cov yam ntxwv diode hauv IC, tab sis qhov kev sim tau pom los ntawm kev ntsuas cov yam ntxwv spectrum (thib ob harmonic) ntawm diode.

Deltascan thev naus laus zis yog thawj thev naus laus zis yam tsis muaj kev kho vajtse ntxiv.

2.2 capacitance coupling xeem ntawm framescan

Framescan siv capacitance coupling los xyuas qhov kev sib txuas ntawm tus pins. Txhua lub cuab yeej muaj lub capacitive sojntsuam ntawm nws. Thaum tus pin excite lub teeb liab, lub capacitive sojntsuam khaws lub teeb liab. Raws li pom hauv daim duab:

1. Lub multi-channel hloov board ntawm lub fixture xaiv lub capacitive sojntsuam ntawm ib tug ntaus ntawv.

2 lub rooj sib tham analog (ATB) nyob rau hauv lub tester xa AC teeb liab mus rau txhua tus pin nyob rau hauv lem.

3. Lub capacitive sojntsuam sau thiab buffers AC teeb liab ntawm tus pin nyob rau hauv kev sim.

4 ATB ntsuas lub teeb liab AC khaws los ntawm kev sojntsuam capacitive. Yog tias ib tus pin txuas nrog lub rooj tsav xwm Circuit Court kom raug, lub teeb liab yuav raug ntsuas; yog tias tus pin raug txiav, yuav tsis muaj teeb liab.

GenRad zoo li thev naus laus zis hu ua qhib Xpress. Lub hauv paus ntsiab lus zoo ib yam.

Qhov kev sib koom ua ke no xav tau cov sensors thiab lwm yam khoom siv, thiab cov nqi xeem yog me ntsis siab dua.