Buku woyamba wa wailesi zofufuzafufuza: bwanji kuti aletse FET

FETs - michenga yopangira zida zamagetsi zamakono, imene ulamuliro transients, komanso ukulu wa linanena bungwe panopa ndi kusintha m'munda magetsi. Pali mitundu iwiri ya zipangizo izi: ndi chipata lotsekedwa (iwonso ogaŵikana transistors ndi anamanga-mu njira ndi kupatsidwa ulemu njira) ndiponso kugwiritsa ntchito kusintha pa. FETs chifukwa makhalidwe yake yapadera ankagwiritsa ntchito zipangizo zamagetsi: amapereka mphamvu, mawailesi akanema, makompyuta, etc.

Pamene akukonza zida zimenezi moti ndithu aliyense woyamba wailesi zofufuzafufuza anakumana ndi funso: bwanji kuti aletse FET? Nthawi zambiri, kutsimikizira zinthu choncho anakumana pamene akukonza katundu pulsed mphamvu. M'nkhaniyi tiona kufotokoza mwatsatanetsatane momwe angachitire izo molondola.

Kodi kufufuza ohmmeter FET

Choyamba, kuyambitsa kuyezetsa wa FET, m'pofunika kuti athane nalo "pinout", mwachitsanzo, ndi zikhomo malo. Pakali pano, pali zambiri Mabaibulo osiyanasiyana zinthu zimenezi, motero, malo maelekitirodi ali osiyana. Mukhoza kupeza michenga yopangira zida zamagetsi transistors ndi kulankhula anasaina. Pakuti chodetsa ntchito zilembo Latin G, D, S. Ngati siginecha palibe, m'pofunika kugwiritsa ntchito mabuku.

Choncho, longosola kulemba kwa ojambula, kukambirana mmene fufuzani FET. Chotsatira ndi kutenga miyeso zofunika chitetezo, chifukwa zipangizo kumunda owonetsetsa magetsi malo amodzi, ndi kuteteza kulephera kwa oterowo chinthu, m'pofunika kukonza pansi. Kuti amachotsa anasonkhanitsa woyang'anira malo amodzi, kawirikawiri ankavala pa dzanja odana ndi malo amodzi pansi wachikopa.

Tisaiwale kuti muyenera kusunga FETs ndi mfundo chatsekedwa. Kuchotsa magetsi malo amodzi, mukhoza chitani kutsimikizira ndondomeko. Izi amafuna ohm mita yosavuta. Pa ntchito mchitidwe pakati pa mfundo zonse kukaniza ayenera kupita osawerengeka, koma pali ena kupatula. Tsopano tidzamva mmene kukayendera munda zotsatira transistor wa N-mtundu.

Ife ntchito zabwino kafukufuku chipangizo ku chipata elekitirodi (G), ndi kafukufuku zoipa kuonana ndi gwero (S). Pa nthawi imeneyi, zikuyamba mlandu chipata capacitance ndi mchitidwe chikuyamba. Pamene kuyeza kukana pakati magwero ndi kuda (D) ohmmeter kusonyeza phindu kukana. Losiyanasiyana transistors, phindu ili ndi losiyana. Ngati yochepa dera malo transistor, kulimbikira pakati kuda ndi gwero adzakhala kachiwiri amakonda osawerengeka. Ngati izo sizitero, izo zimatanthauza kuti transistor ndi olakwika.

Ngati mudzapempha momwe fufuzani FET P-mtundu, yankho lake ndi losavuta: kubwereza ndondomeko pamwamba amasintha okha polarity. Tisaiwale kuti amakono mphamvu FET pakati magwero ndi kuda ndi diode thupi, motero, "prozvanivatsya" izo mu umodzi malangizo chabe.

Chongani FET multimeter

Pamaso pa chipangizo "DMM", mungawerenge FET. Kuchita izi, ife poyera mita kuti "kupitiriza" mode diodes ndipo muwuzeni mchitidwe kumunda akafuna machulukitsidwe. Ngati N-mtundu transistor, ndi opanda kafukufuku kukhudza kuda ndi zabwino - shutter. Zosalongosoka transistor mu Zikatero lidzatsegulidwa. Ife kusamutsa kuphatikiza kafukufuku asanatenge opanda, pa kasupe, ndi multimeter amasonyeza phindu kukana. Kenako kuchokera transistor: popanda kutukula cholembera kuchokera ku gwero, opanda kukhudza shutter ndi kubwerera ku kukhetsa. Transistor zotchinga ndi kukana amamuchititsa osawerengeka.

Amateurs ambiri wailesi akufunsidwa kuti: "Kodi ndafika pa FET, osati vypaivaya" Nthawi yomweyo kuyankha njira kuti palibe zana pa zana. Kuchita izi, ntchito multimeter chipika cha HFE, koma njira zambiri sichitha, ndipo mukhoza kuwononga nthawi yayitali.