ElectronicsI_L19 - Lecture 19 A New Transistor • We are...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture 19 A New Transistor • We are now going to cover the second class of transistors: Bipolar Junction Transistors • Their name comes from the basic structure, which amounts to two back-to-back diodes. • Once they were the dominant transistors used. It was only in the 70’s and 80’s that the MOSFET became a serious competitor. • As we will see, they aren’t as simple to make • But they handle much higher current loads and can switch much faster than MOSFET’s • However they don’t have the low power consumption of the MOSFETs BJT Structure • here you can see the back-to-back diode structure. • In reality, the base is very thin • This is called a n-p-n BJT • There is another form with the opposite configuration of p and n material, called pnp. Modes of Operation Mode EBJ CBJ Cutoff reverse reverse Active forward reverse Reverse Active reverse forward Saturation forward forward Operation of NPN in Active Mode • The BJT is a current based device....
View Full Document

This note was uploaded on 02/13/2012 for the course PHYSICS 16.365 taught by Professor Staff during the Summer '10 term at UMass Lowell.

Page1 / 10

ElectronicsI_L19 - Lecture 19 A New Transistor • We are...

This preview shows document pages 1 - 6. Sign up to view the full document.

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