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UNIT 1 Semiconductor Diode

UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess

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Page 1: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess

UNIT 1

Semiconductor Diode

Page 2: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 3: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 4: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 5: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 6: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 7: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 8: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 9: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 10: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess

PN junction diode

• A PN junction is a device formed by joining p-type with n-type semiconductors and separated by a thin junction is called a PN junction diode.

Page 11: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess

Symbol

Page 12: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 13: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 14: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 15: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 16: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 17: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 18: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 19: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 20: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 21: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 22: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 23: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 24: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 25: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 26: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 27: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 28: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 29: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 30: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess

ZENER DIODE

• Zener diode is designed to operate in the breakdown region.

• It is heavily doped than ordinary diode.

Page 31: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 32: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess

Operation of zener diode

• Under FB,it operates same as ordinary PN diode.

• Under RB,breakdown of juncition occurs.

• For heavily doped,breakdown occurs at lower reverse voltage.

• For lightly doped,breakdown occurs at higher reverse voltage.

Page 33: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 34: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 35: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 36: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 37: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 38: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 39: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess

Full wave Bridge Rectifier

Page 40: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess

Operation of Bridge Rectifier

Page 41: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 42: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess
Page 43: UNIT 1 Semiconductor Diode - SRM Institute of Science … of depletion layer NO external connections: the excess electrons in the N region cross the junction and combine with the excess

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