Electronic Devices and Integrated Circuits

5

Physical Phenomenon in BJT

5.1 Introduction

John Bardeen and Walter Brattain of Bell Telephone Laboratory, America, invented the point contact transistor in the year 1948. Subsequently these two along with William Shockley replaced the point contact transistor by junction transistor in 1949. They were jointly awarded Nobel Prize in recognition of this unique work in Physics. The role of semiconductor in electronics technology has assumed much greater prominence with the advent of the transistor. The invention of the transistor revolutionised the field of electronics. Since then rapid and continuous development of semiconductor devices such as FET, MOSFET, SCR, etc. have been taking place. The junction transistor is more appropriately called ...