Electronic Devices and Circuits
Engineering Sciences 154

Lecture Notes

Bipolar Transistors


Bardeen, Shockley and Brattain
(History, Nobel Prize)

The Diode Current/Voltage Characteristic Revisited

click image to enlarge
IV characteristic as viewed from the viewpoint of a diode circuit designer (i.e., emphasis on role of majority carriers)
click image to enlarge
IV characteristic as viewed from the viewpoint of a transistor designer (i.e., emphasis on role of minority carriers)

The Transistor Configuration:

Conceptualization of bipolar junction transistors (BJT)
as back-to-back diode configurations (Source)

For discussion see Basic Diffused Transistor Process (local copy)
More Realistic IC NPN Transistor

 Simple (Descriptive) Analysis:

The Bipolar Transistor Page
from L.C.G. Lesurf's (University of St. Andrews) The Scot's Guide to Electronics
 
Click on images to enlarge

Picture of basic charge carrier dynamics based on the applet

PN Junction Diode under Bias

More Detailed Analysis:

See Slides 21 to 35 of the Technische Universität Darmstadt slide set.

Base current discussion

Collector current discussion

BJT Large and Small Signal Models

BJT biasing circuits

Basic amplifier configurations

 
Valuable references at Links to Electronics Tutorials in particular the  list of interactive applets from SUNY-Buffalo.  We shall make use of the lectures Principles of Semiconductor Devices from the University of Colorado.
 
 
 
This page was prepared and is maintained by R. Victor Jones
Comments to: jones@deas.harvard.edu.

Last updated October 29, 2001