Xov xwm

Lub Diode yog tsim los ntawm PN kev sib tshuam, thiab lub photodiode tuaj yeem hloov kho qhov muag teeb liab mus rau hauv cov teeb liab hluav taws xob, raws li qhia hauv qab no: Feem ntau, covalent daim ntawv cog lus yog ionized thaum lub PN hlws ris yog illuminated nrog lub teeb. Qhov no tsim lub qhov thiab electron khub. Lub photocurrent yog generated vim t ...

LAN yog qhov nrov tshaj plaws uas peb siv niaj hnub no. LAN yog dab tsi? Local Area Network (LAN) yog hais txog ib pawg ntawm cov khoos phis tawj sib txuas los ntawm ntau lub khoos phis tawj hauv ib cheeb tsam uas siv cov channel tshaj tawm. Qhov ntau muaj nyob rau hauv cheeb tsam no, cov khoom siv ntau dua tuaj yeem sib txuas lus. Thiab tsuas yog cov ...

Nrog rau txoj kev loj hlob sai ntawm cov khoos phis tawj thiab lawv cov kev sib txuas thev naus laus zis (tseem hu ua "network technology"), Ethernet tau dhau los ua qhov luv luv ntawm ob-txheej khoos phis tawj network nrog qhov nkag siab tshaj plaws kom deb li deb. Qhov tseem ceeb ntawm Ethernet yog Ethernet hloov. Phau ntawv thiab ...

VCSEL, uas yog hu ua Vertical Cavity Surface Emitting Laser tag nrho, yog ib hom semiconductor laser. Tam sim no, VCSEL feem ntau yog raws li GaAs semiconductors, thiab cov emission wavelength feem ntau yog nyob rau hauv infrared yoj band. Xyoo 1977, xibfwb Ika Kenichi ntawm Tokyo University of Technology fir ...

Lub network tuaj yeem faib ua LAN, LAN, MAN, thiab WAN. Cov ntsiab lus tshwj xeeb ntawm cov npe no tau piav qhia thiab muab piv rau hauv qab no. (1) Personal Area Network (PAN) Cov tes hauj lwm zoo li no tuaj yeem ua kom muaj kev sib txuas lus luv luv ntawm cov khoom siv nqa tau thiab cov khoom siv sib txuas lus, Cov ...

RSSI yog cov ntawv luv ntawm Txais Cov Lus Qhia Lub Zog. Qhov tau txais cov cim lub zog yog xam los ntawm kev sib piv ob qhov tseem ceeb; uas yog, nws tuaj yeem siv los txiav txim siab npaum li cas muaj zog lossis qaug zog lub teeb liab lub zog piv nrog lwm lub teeb liab. Tus lej lej ntawm RSSI ...