Presentation is loading. Please wait.

Presentation is loading. Please wait.

Transistors & Semiconductors. Transistor Amplifying Switch – Current to base enables current from emitter to collector – Base requires small amount of.

Published byShawn Owens Modified over 9 years ago

Similar presentations

Presentation on theme: "Transistors & Semiconductors. Transistor Amplifying Switch – Current to base enables current from emitter to collector – Base requires small amount of."— Presentation transcript:

1 Transistors & Semiconductors

2 Transistor Amplifying Switch – Current to base enables current from emitter to collector – Base requires small amount of current relative to emitter

3 Silicon SI = Element 14 – 4 electrons in outer shell – 8 would be full

4 Silicon Silicon crystal – Stable diamond like structure – Thermal noise occasionally bumps electrons, but settle back rapidly

5 Doping Doped silicon has impurities – N type : Extra electrons Phosphorus – P type : Short an electron Boron

6 Doped Conductors Doped silicon: – Free roaming electrons or holes – Phosphorus/Boron ions

7 N + P Sandwich N&P sandwich forms neutral area : Depletion layer – Insulation against flow

8 N + P Sandwich N&P sandwich forms : Depletion layer – Electrons/holes merge – Ions present barrier to more movement

9 N + P Sandwich = Diode Current flow into N closes depletion layer Current flow into P increases depletion layer

10 Transistor = Diode Sandwich Transistor is 3 layers: – NPN or PNP Default is to insulate

11 Transistor = Diode Sandwich Positive current at base removes spare negatives – Shrink P  N depletion layer Relatively small current at base http://www.youtube.com/watch?feature=play er_embedded&v=9CrcRabTQ0s# http://www.youtube.com/watch?feature=play er_embedded&v=9CrcRabTQ0s#

12 MOS MOS – Metal Oxide – "Metal" conductor – Oxide insulator Charge to conductor produces conductive layer in silicon via field effect

13 MOSFET Metal Oxide Field Effect Transistor – NPN regions of silicon – Conductor used to create channel Channel requires no current!!!

14 CMOS CMOS : Complementary MOSFETS – NPN and PNP used together Always high or low signal http://www.youtube.com/watch ?v=QO5FgM7MLGg&list=FL8JW MIsIgFMX3tv2BU-K4Uw (Jump to 3:00) http://www.youtube.com/watch ?v=QO5FgM7MLGg&list=FL8JW MIsIgFMX3tv2BU-K4Uw

15 Fabrication Circuits "printed" with photo reactive chemicals light http://www.youtube.com/watch?v=35jWSQXk u74&list=FL8JWMIsIgFMX3tv2BU-K4Uw http://www.youtube.com/watch?v=35jWSQXk u74&list=FL8JWMIsIgFMX3tv2BU-K4Uw – Minute 2

Download ppt "Transistors & Semiconductors. Transistor Amplifying Switch – Current to base enables current from emitter to collector – Base requires small amount of."

Similar presentations

Semiconductors Chapters 19 20 22.

Semiconductors Chapters
Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors.

Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors.
ELECTRICAL CONDUCTIVITY

ELECTRICAL CONDUCTIVITY
ECE G201: Introductory Material Goal: to give you a quick, intuitive concept of how semiconductors, diodes, BJTs and MOSFETs work –as a review of electronics.

ECE G201: Introductory Material Goal: to give you a quick, intuitive concept of how semiconductors, diodes, BJTs and MOSFETs work –as a review of electronics.
Instructor Name: (Your Name)

Instructor Name: (Your Name)
Caroline Chisholm College Physics

Caroline Chisholm College Physics
Electronic Devices Eighth Edition Floyd Chapter 1.

Electronic Devices Eighth Edition Floyd Chapter 1.
Field Effect Transistors and their applications. There are Junction FETs (JFET) and Insulated gate FETs (IGFET) There are many types of IGFET. Most common.

Field Effect Transistors and their applications. There are Junction FETs (JFET) and Insulated gate FETs (IGFET) There are many types of IGFET. Most common.
8.01-.02 Basic Electricity and Electronics Mr. McClean Concepts of Engineering and Technology Copyright © Texas Education Agency, 2012. All rights reserved.

Basic Electricity and Electronics Mr. McClean Concepts of Engineering and Technology Copyright © Texas Education Agency, All rights reserved.
9/24/2004EE 42 fall 2004 lecture 111 Lecture #11 Metals, insulators and Semiconductors, Diodes Reading: Malvino chapter 2 (semiconductors)

9/24/2004EE 42 fall 2004 lecture 111 Lecture #11 Metals, insulators and Semiconductors, Diodes Reading: Malvino chapter 2 (semiconductors)
Laboratory for Perceptual Robotics – Department of Computer Science Embedded Systems Semiconductors.

Laboratory for Perceptual Robotics – Department of Computer Science Embedded Systems Semiconductors.
Lecture 0: Introduction. CMOS VLSI Design 4th Ed. 0: Introduction2 Introduction  Integrated circuits: many transistors on one chip.  Very Large Scale.

Lecture 0: Introduction. CMOS VLSI Design 4th Ed. 0: Introduction2 Introduction  Integrated circuits: many transistors on one chip.  Very Large Scale.
Chapter 29 Solid State Electronics

Chapter 29 Solid State Electronics
WEEK ONE TOPIC: ELECTRONICS SOLID STATE MATERIALS  CONDUCTORS  INSULATORS  SEMICONDUCTORS.

WEEK ONE TOPIC: ELECTRONICS SOLID STATE MATERIALS  CONDUCTORS  INSULATORS  SEMICONDUCTORS.
Unit 7, Chapter 24 CPO Science Foundations of Physics.

Unit 7, Chapter 24 CPO Science Foundations of Physics.
Transistors Three-terminal devices with three doped silicon regions and two P-N junctions versus a diode with two doped regions and one P-N junction Two.

Transistors Three-terminal devices with three doped silicon regions and two P-N junctions versus a diode with two doped regions and one P-N junction Two.
Transistor.

Transistor.
ELECTRONICS. Ever wondered why TV, radio and mobile phones are called electronic gadgets…?? Lets find out why is it so..!!

ELECTRONICS. Ever wondered why TV, radio and mobile phones are called electronic gadgets…?? Lets find out why is it so..!!
Lecture 13 Lecture by John O'Donnell, used with permission. 1 CS1Q Computer Systems Lecture 13 Simon Gay.

Lecture 13 Lecture by John O'Donnell, used with permission. 1 CS1Q Computer Systems Lecture 13 Simon Gay.
Electric Components. Basics 1 Current: electrons moving together in same direction (electrons are always moving in materials like metals but in a random.

Electric Components. Basics 1 Current: electrons moving together in same direction (electrons are always moving in materials like metals but in a random.

Similar presentations

Ads by Google