JFET Junction Field Effect Transistor - PowerPoint PPT Presentation
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JFET Junction Field Effect Transistor
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JFET (Junction Field Effect Transistor) Unipolar device (one polarity ... Source and drain are interchangeable in most. low-frequency applications. Gate. Drain ... – PowerPoint PPT presentation
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Title: JFET Junction Field Effect Transistor
1
JFET (Junction Field Effect Transistor)
- Unipolar device (one polarity of charge carrier)
- Voltage controlled (gate voltage controls
- drain current)
- High input impedance (?109-1012 ?)
- No minority carrier storage
- Source and drain are interchangeable in most
- low-frequency applications
2
SYMBOLS
p-channel JFET
n-channel JFET
n-channel JFET Offset-gate symbol
3
Operation of a JFET
Drain
-
N
Gate
P
P
DC Voltage Source
-
-
N
Source
