Thaum kho cov khoom siv hluav taws xob, nws yog qee zaum yuav tsum tau kuaj seb daim teb cuam li cas transistors. Cov cuab yeej hluav taws xob semiconductor no ua cov tseem ceeb muaj zog hauv feem ntau. Qee zaum nws tshwm sim uas lawv swb.
Tsim nyog
Multimeter lossis ohmmeter
Cov Lus Qhia
Kauj ruam 1
Txheeb xyuas cov hauj lwm-hloov transistor thaum nws tau muag rau hauv hluav taws xob hluav taws xob yuav tsis ua haujlwm, yog li desolder nws ua ntej kev kuaj. Tshawb xyuas qhov xwm txheej. Yog tias muaj ib lub qhov ntawm cov ntaub ntawv los ntawm cov siv lead ua kua yaj, tom qab ntawd tsis muaj qhov taw tes hauv kev kuaj xyuas lub transistor. Yog tias lub cev tsis txav lawm, tom qab ntawd koj tuaj yeem pib kuaj xyuas.
Kauj ruam 2
Feem coob ntawm lub zog hluav taws xob cov nyhuv transistors yog MOS-FET thiab insulated rooj vag n-channel. Tsawg dua nrog cov p-channel, feem ntau hauv cov theem kawg ntawm cov suab tso tawm suab. Cov qauv sib txawv ntawm cov hloov pauv mus los hauv ib cheeb tsam yuav tsum muaj ntau txoj kev ntsuas lawv.
Kauj ruam 3
Tom qab unsoldering lub transistor, cia kom txias.
Kauj ruam 4
Tso cov transistor rau ntawm daim ntawv qhuav. Ntxig liab ohmmeter ua rau txoj hauv kev txuas zoo thiab dub ib qho mus rau hauv qhov tsis zoo txuas. Teeb ntsuas kev ntsuas rau 1kΩ. Lub channel tsis kam ntawm qhov qhib transistor yog nyob ntawm qhov voltage siv rau lub rooj vag txheeb ze rau qhov chaw, yog li ntawd, nyob rau hauv tus txheej txheem ntawm kev ua haujlwm nrog transistor, koj tuaj yeem tsim kev ntsuas qhov yooj yim dua rau koj. Kev sib txuas ntawm cov electrodes hauv qhov yog qhia hauv daim duab.
Kauj ruam 5
Siv lub tshuab hluav taws xob "hluav taws xob" ntawm qhov transistor nrog cov kev sojntsuam dub, thiab kov lub "ntws" electrode nrog lub xim liab. Yog tias lub ntsuas hluav taws xob pom luv luv, tshem qhov kev ntsuas tawm thiab txuas tag nrho peb cov hluav taws xob nrog lub hau ntswj. Lub hom phiaj yog los tso lub peev xwm ntawm lub rooj vag, nws kuj yuav raug them. Tom qab ntawv rov ua qhov ntsuas ntawm cov channel tsis kam. Yog tias cov cuab yeej tseem ua qhia luv luv, tom qab ntawv transistor yog yuam kev thiab yuav tsum tau hloov.
Kauj Ruam 6
Yog tias cov cuab yeej ua rau pom kev tsis kam ze rau infinity, tom qab ntawd xyuas lub rooj vag hloov mus. Nws yog txheeb tib txoj kev uas yog hloov channel. Kov txhua qhov ntsuas ntawm cov electrode "qhov" ntawm qhov transistor, thiab nrog lwm tus kov cov electrode "rooj vag". Cov ua hauj yuav tsum yog zoo kawg. Lub rooj vag insulated tsis yog hluav taws xob sib txuas rau cov channel ntawm cov transistor thiab ib qho tsis kam nyob rau hauv Circuit Court no qhia qhov ua haujlwm tsis zoo ntawm transistor.
Kauj Ruam 7
Cov txheej txheem los kuaj xyuas qhov ua tau zoo ntawm transistor zoo li qhov no: Kov qhov kev sojntsuam dub ntawm ohmmeter mus rau "qhov" hluav taws xob ntawm qhov transistor, kov qhov kev sojntsuam liab ntawm lub "rooj vag" electrode. Cov ua hauj yuav tsum yog infinitely siab, tom qab ntawd, tsis kaw qhov "rooj vag" rau lwm cov electrodes, kov lub "ntws" electrode nrog cov kev sojntsuam liab. Lub cuab yeej yuav ua rau pom kev tsis kam me me hauv thaj chaw no. Tus nqi ntawm qhov kev tawm tsam no nyob ntawm qhov voltage ntawm ohmmeter probes. Tam sim no kov lub "qhov" electrode nrog cov kev sojntsuam liab, rov ua cov txheej txheem saum toj no. Lub channel tsis kam yuav zoo heev, ze rau infinity. Cov qauv ntawm kev sim MOS-FET transistor nrog p-channel sib txawv hauv qhov thaum ntsuas nws yuav tsum hloov qhov xim liab thiab dub ohmmeter kev soj ntsuam ntawm lawv tus kheej.
