The large signal BJT equation gives the transconductance: VCE 1 le - bole" - 1)(1+)- k, = 26 mV at room temperature e al
Posted: Fri Apr 29, 2022 9:07 am
- The Large Signal Bjt Equation Gives The Transconductance Vce 1 Le Bole 1 1 K 26 Mv At Room Temperature E Al 1 (81.14 KiB) Viewed 26 times
The large signal BJT equation gives the transconductance: VCE 1 le - bole" - 1)(1+)- k, = 26 mV at room temperature e alc Ic OVE VE . However, since le=(1+1/B)Ic, av R = BE = BV, 11. = B/. al Same equation gives output conductance: dlc - le Gce=1/RCE OVCEVA BJT model Capacitances Cac = Coco + C, CBE =CBEO+C, +C) ВЕО BC junction is reverse biased: depletion capacitance overlap capacitance BE junction is forward biased: depletion capacitance storage (diffusion capacitance) overlap capacitance CE capacitance is small overlap capacitance Fringing/Overlap capacitances: CCE = CEO Свсе , СВЕО , ССво C= M 1- BE Junction capacitance: Reverse biased diode M=1/2-1/3, from doping approx 0.8V M, usually determined from two bias points Φ Cp = 8.11 Ty=1/22f, . Diffusion capacitance from transit time