Field Effect Transistor

1
Field Effect Transistor

• Graphical Introduction

2
FET family

• JFET
• Junction FET
• D-MOSFET
• Depletion Metal Oxide Semiconductor FET
• E-MOSFET
• Enhancement Metal Oxide Semiconductor FET

3
JFET type
p-channel
n
n
p
p-channel
n-channel
4
JFET concept
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JFET (G-D-S Relationship)
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JFET Characteristic Curve
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D-MOSFET
Depletion region ?
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D-MOSFET (p n channel)
Why D-MOSFET has depletion enhancement mode ?
9
E-MOSFET
Enhancement region ?
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E-MOSFET (p n channel)
Why E-MOSFET has only enhancement mode ?
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Symbols
JFET
E-MOSFET
D-MOSFET