121B_1_EE121B

121B_1_EE121B - Emitter Injection Efficiency The emitter...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Slide 3-40 © 2006 Marko Sokolich All Rights Reserved EE 121B – Chi On Chui Emitter Injection Efficiency The emitter injection efficiency depends on the ratio of the electron and hole currents in this emitter-base PN junction En Ep E i i i + = En Ep Ep En En i i i i i + = + = 1 1 γ + = 1 0 0 kT qV p n n n p p BE e n L D p L D qA I dE pE nB aB nB pE i aB nB nB dE pE pE N L N L n N D L N n L D i µ + = + = 1 1 1 1 2 2 d i n i n N n n n p 2 0 2 0 = = a i p i p N n p n n 2 0 2 0 = = Slide 3-41 © 2006 Marko Sokolich All Rights Reserved EE 121B – Chi On Chui Emitter Injection Efficiency The emitter injection efficiency depends on the ratio of the electron and hole currents in this emitter-base PN junction En Ep E i i i + = En
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/11/2010 for the course EE 121b taught by Professor Bjt-gamma during the Winter '08 term at UCLA.

Ask a homework question - tutors are online