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Diodes

Mohammad Dehghani

Mohammad Dehghani

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outline

Mohammad Dehghani

Preface

Main function

History

Structure

Manufacturing

Characteristic

Types of diodes

AC meter devices

Oscilloscope

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Thin bar depicts the cathode

Typical diode packages in same alignment as diode symbol

Mohammad Dehghani

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History

Frederick Guthrie

Thomas Edison

Alexander Fleming

Thermionic Diodes

1873

1884

1904

Mohammad Dehghani

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History

Semiconductor Diodes

Karl Ferdinand

Jagadish Chandra Bose

Greenleaf Whiter Pickard

1874

1894

1906

Mohammad Dehghani

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silicon bohr model

e e

e

e e

e

e

e

e

e

e

e

e

e

Mohammad Dehghani

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Si

As

Si

Si

Si

Si

Si

Si

Si

P & n types

Si

B

Si

Si

Si

Si

Si

Si

Mohammad Dehghani

Si

P-typeN-type

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P-n junction formation

Ge(n-type) Ge(n-type)

In

P-type

Mohammad Dehghani

Si(n-type) Si(n-type)

Al

P-type

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Si(n-type) Si(n-type)

P-typeP-type

Mohammad Dehghani

P-n junction formation

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Half wave rectifier

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full wave rectifier

Mohammad Dehghani

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