MIT6_012s09_tutor09

MIT6_012s09_tutor09 - . Assume that recombination only...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
MIT OpenCourseWare http://ocw.mit.edu 6.012 Microelectronic Devices and Circuits Spring 2009 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6.012 Microelectronic Devices and Circuits Tutorial #9 Problem 1 pnp Bipolar Junction Transistor Parameters for pnp BJT: N aE = 10 18 cm 3 N dB = 10 16 cm 3 N aC = 10 15 cm 3 D nE = 20 cm 2 /s D nC = 30 cm 2 /s D pB = 10 cm 2 /s A E = 100 μ m 2 L B = 1.0 μ m L E = 2.0 μ m L C = 3.0 μ m L E and L C are the distances between the contacts and the abrupt junctions. L B is the distance between the base emitter and base collector abrupt junctions. Note that L E , L B and L C are not widths of the quasi neutral regions in the Emitter, Base and Collector
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: . Assume that recombination only occurs at the contacts and that there is no recombination in the quasi neutral regions or the space charge regions. a) What are the thermal equilibrium values of the potential barrier for the base emitter ( BE ) and base collector ( BC ) junctions? b) What is the width of the quasi neutral base region, W B at equilibrium? c) What is F (ignore the effect of the depletion region under forward bias for this calculation)?...
View Full Document

This note was uploaded on 09/24/2010 for the course EE 6.012 taught by Professor Charlessodini during the Spring '08 term at MIT.

Page1 / 2

MIT6_012s09_tutor09 - . Assume that recombination only...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online