solid state devices crystal diodes – a crystal and a bronze wire semiconductors – made from poor...

16

Solid state devices • Crystal diodes – a crystal and a bronze wire • Semiconductors – made from poor conductors with conductive impurities – Poor conductors = silicon and germanium – Impurities = • “P” substances with a shortage of electrons • “N” substances with excess electrons

Upload: shayla-brumley

Post on 14-Dec-2015

220 views

Category:

Documents

0 download

Report

Download

Tags:

Embed Size (px):

TRANSCRIPT

Page 1: 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 = silicon and germanium– Impurities =• “P” substances with a shortage of electrons• “N” substances with excess electrons

Page 2: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Solid state diode

N PBARRIER REG

ION

Page 3: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Solid state diode

N PBARRIER REG

ION

Page 4: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Solid state diode

N PBARRIER REG

ION

Page 5: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Solid state diode

Page 6: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Junction transistor

• Transfer + Resistance = Transistor• Made up of “sandwich” of PNP or NPN

materials

Page 7: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Junction transistor

N

NP

Page 8: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

emitter

collector

base

Junction transistor

Page 9: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Junction transistor

Page 10: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Solid state devices

• Junction transistor – “junction” refers to the junction between materials – where voltage appears. – Current amplifier (tubes are voltage amps)

• Field effect transistor – “FET” is a low power high impedance device

• Silicone controlled rectifier – “SCR” controls current flow – used in varispeed and dimmer

Page 11: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Solid state devices

• Zener diode – allows output voltage to be fixed for use in power supply

Page 12: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Solid state –v- vacuum tube

Solid state• Efficient (little heat)• Infinite lifespan• Compact• Physically rugged• Low power ouput• Low impedance

Vacuum tube• Requires and produces heat• Finite lifespan• Large• Delicate• High power output• High impedance

Page 13: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Transistors

Page 14: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Printed circuit

Page 15: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Printed circuit

Page 16: Solid state devices Crystal diodes – a crystal and a bronze wire Semiconductors – made from poor conductors with conductive impurities – Poor conductors

Integrated circuit

Conductors - TNB.COM PVCcolourstoBS5252. Conductors

Sizing conductors

Periodic Properties of the Elements Nonmetals Dull, brittle substances that are poor conductors of heat and electricity. Tend to gain electrons in reactions

Ionic Conductors: Characterisation of Defect Structure Lectures 1-4 Introduction to Crystal Chemistry Dr. I. Abrahams Queen Mary University of London Lectures

Electricity Magnetism Lecture 9: Conductors and Capacitance Lecture 10 - Conductors and... · Electricity & Magnetism Lecture 9: Conductors and Capacitance ... The two conductors

Electrical Systems Conductors good electrical conductors

FLEXIBLE CONDUCTORS

Conductors and Insulators Conductors - Appalachian State

Semi conductors

Insulators and Conductors Objective: Describe insulators and conductors. Identify materials that are good insulators and conductors

The use of free-space microwave techniques for damage detection in materials … · 2020-01-18 · dielectric properties or poor conductors (DF ≪ 1), good conductors or high loss

Thermal conductivity of poor conductors

Flow Control and Propulsion in Poor Conductors

Electrical conductors

Properties of Covalent (Molecular) Substances. Poor conductors of heat & electricity in any phase. No charged particles! Low melting & boiling points:

Unit 6.2 Heatmypintegratedscienceteacher.weebly.com/.../heat_textbook.pdf · 2019. 9. 23. · Heat Insulators Poor conductors are known as insulators. Insulators are particularly

Non-Metals & Metalloids. Properties of Non-Metals Non-metals are poor conductors of heat and electricity. Non-metals are not ductile or malleable. Solid

GROWTH, CRYSTAL STRUCRURE AND TRANSPORT PROPERTIES OF ONE-DIMENSIONAL CONDUCTORS NbS 3

Conductors and Insulators Conductors

Attack of the Extra Terrestrial - Music Direct · tal conductors where average length of a copper crystal is 125 meters; there-fore the signal doesn’t have to struggle through crystal

Conductors and non-conductors Conductors are materials that conduct electricity. Non-conductors or insulators are materials that do not conduct electricity

Aberdare Conductors

Materials conductors

ACSR Conductors

BS 215-1 Aluminum Conductors & Aluminum Conductors Steel-Reinforced for Overhead Power Transmission (Aluminum Stranded Conductors)

Ceramic conductors

From Electrodi usion Theory to the Electrohydrodynamics of ...ymori/docs/publications/weak_electrolyte_jfm_final.pdfthe TM model describes poor conductors. Together with the assumption

Bare Conductors

11.4 Conductors and Insulators - Weebly...11.4 Conductors and Insulators Scientists have categorized most materials into two categories: conductors and insulators (Figure 1). Conductors

Chapter 4: Section 4. Are poor conductors, have reactivity, solid nonmetals are dull, brittle, non- malleable, non-ductile

Vasos conductors

Overhead Conductors

Organic liquid-crystal devices based on ionic conductors · 5/22/2017 · rsc.li/materials-horizons Conceptual insights Conventional liquid-crystal devices are stiﬀ and brittle,