Transistor sambungan dwikutub: Béda antara owahan

Penjelasan fisika kangge arus kolektor inggih punika jumlah muatan pembawa minoritas ing daerah basis.<ref name=hh/><ref>{{cite book|title=Semiconductor Device Physics and Simulation|author=Juin Jei Liou and Jiann S. Yuan|publisher=Springer|year=1998|isbn=0306457245|url=http://books.google.com/books?id=y343FTN1TU0C&pg=PA166&dq=charge-controlled+bjt+physics&as_brr=0&ei=l9viRqilEIjopQL_i6WFDg&sig=vXciSaFRmNUmg3KIhmBX7DCiVOA}}</ref><ref>{{cite book|title=Transistor Manual|author=General Electric|edition=6^th|year=1962|page=12}} "If the principle of space charge neutrality is used in the analysis of the transistor, it is evident that the collector current is controlled by means of the positive charge (hole concentration) in the base region. ... When a transistor is used at higher frequencies, the fundamental limitation is the time it takes the carriers to diffuse across the base region..." (same in 4^th and 5^th editions)</ref> Model mendetail dari kerja transistor, [[model Gummel–Poon]], menghitung distribusi dari muatan tersebut secara eksplisit untuk menjelaskan perilaku transistor dengan lebih tepat.<ref>{{cite book|title=Semiconductor Device Modeling with Spice|author=Paolo Antognetti and Giuseppe Massobrio|publisher=McGraw–Hill Professional|year=1993|isbn=0071349553|url=http://books.google.com/books?id=5IBYU9xrGaIC&pg=PA96&dq=gummel-poon+charge+model&as_brr=3&ei=v4TkRp-4Gp2cowLM7bnCCw&sig=vYrycIhlQKCq7VmoK231pjYXPyU#PPA98,M1}}</ref> Pandangan ngenai kendali-muatan kaliyan gampil nangani transistor-foto, ing pundhi mbeta minoritas ing daerah basis dipunbangkitaken dening penyerapan foton, lan nangani pematian dinamik utawi wekdal pulih, ing pundhi gumantung ing penggabungan malih muatan ing daerah basis. menawi mekaten, amargi muatan basis menika mboten isyarat ingkang saged dipunukur ing saluran, pandangan kendali arus lan tegangan biasanipun dipunginaaken ing desain lan analisis sirkuit.

Ing desain sirkuit analog, pandangan kendali arus asring dipunginaaken amargi punika linier. Arus kolektor kinten-kinten <math>\beta_F</math> kali lipat saking arus basis. Pinten-pinten sirkuit dasar saged dipundesain kaliyan mengasumsiaken menawi tegangan emitor-basis kinten-kinten ajeg, lan arus kolektor inggih punika beta kali lipat saking arus basis. Menawi mekaten, kangge ndesain sirkuit BJT kaliyan akurat lan saged dipunandalaken, dipunbetahaken model kendali-tegangan (dados tuladha [[model Ebers–Moll]])<ref name=hh/>. Model kendali-tegangan mbetahaken fungsi eksponensial ingkang kedhah dipunperhitungaken, menawi punika dipunlinieraken, transistor saged dimodelaken dados sebuah transkonduktansi, kadasta ing [[model Ebers–Moll]], desain kangge sirkuit kadasta penguat diferensial dados prekawis linier, dados pandangan kontrol-tegangan asring dipunutamakaken. Kangge sirkuit translinier, ing pundhi kurva eksponensiak I-V inggih punika kunci saking operasi, transistor biasanipun dipunmodelaken dados terkendali tegangan kaliyan transkonduktansi sebanding kaliyan arus kolektor.