VCE IC IE C E VCB VBE IB + _ + _ B VCB VBE Common-Base Circuit Diagram: NPN Transistor The Table Below lists assumptions that can be made for the attributes of the common-base biased circuit in the different regions of operation. Emitter-Current Curves IC Active Region IE Saturation Region Cutoff IE = 0 VCB Bias Common-Base (CB) : input = VEB & IE output = VCB & IC Bias Common-Emitter (CE): input = VBE & IB output = VCE & IC Bias Common-Collector (CC): input = VBC & IB output = VEC & IEĬommon-Base Although the Common-Base configuration is not the most common biasing type, it is often helpful in the understanding of how the BJT works. TigaTypesdari Bias BJT Bias transistor adalah kondisi tegangan dimana transistor tersebut bisa melakukan operasi (kerja).

Transistor yang edial sebagaimana posisi saklar terbuka * Note: There is also a mode of operation called inverse active, but it is rarely used.Transistor berada sebagaimana pada posisi short circuit.Beroperasi sebagai penguat Saturation:.VT = kT/q = 26 mV T=300K)  = Coefisien emisi biasanya ~1 IC 8 mA 6 mA 4 mA 2 mA VBE 0.7 V  =  = 20 = 0.95238  + 1 21 C IC VCB + _ IB B VBE IE + _ EĬurve TransconductanceBJT Transistor Tipe NPN Arus Collector : IC =  IESeVBE/VT Transconductance: (slope of the curve) gm =  IC /  VBE IES = Arus saturasi terbalik dari B-E Junction. = IC / IB = 1 mA / 0.05 mA = 20  = IC / IE = 1 mA / 1.05 mA = 0.95238  Juga dapat dicari dengan  dengan rumus sebagai berikut.Rumusan Dasar BJT IE IC IE IC - VCE + + VEC - E C E C - + + VBE VBC IB VEB VCB IB + + - B B npn IE = IB + IC VCE = -VBC + VBE pnp IE = IB + IC VEC = VEB - VCBĭC  and DC   = Arus penguatan Common-emitter  = Arus penguatan Common-base  = IC = IC IB IE Hubungan antara dua parameters tersebut adalah:  =   =   + 1 1 - īJT Example Konfigurasi Common-Base Transistor NPN Base doping is slightly higher ~ 107 – 108.BJT – Bipolar Junction Transistor Dua Type BJT Transistor: npn pnp n p n p n p E C E C Cross Section C Cross Section C B B B B Symbol Symbol E E

Bipolar transistor gamma