MOS Field-Effect
Transistors
(MOSFETs)
Made By: Group 8
Introduction
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What does (MOSFET) mean?
It is the metal-oxide-semiconductor fieldeffect transistor.
The MOSFET has become the most widely
used electronic device, especially in the
design of integrated circuits(ICs).
A semiconductor is made of manufactured
material that acts neither like a insulator nor a
conductor.
MOSFET is a transistor used for amplifying or
switching electronic signals.
MOSFET- Basic Structure
3 terminal device:
• Source
• Drain
• Gate
VG =0 …. ISD=ID=0
VG <0 …. ID=0
VGS –Vt = v0V
Structure and principle of operation
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We have a top view of MOSFET, the
the gate length,L, and gate width, W.
The overlap is made as small as
possible in order to minimize its
parasitic capacitance.
Clear that L does not equal the
physical dimension of the gate, but
rather the distance between the
source and drain regions underneath
the gate.
The overlap between the gate and
Top view of an n-type
the source/drain region is required to
ensure that the inversion layer forms a MOSFET
continuous conducting path
between the source and drain region.
Regions of MOSFET
I-V Characteristics of MOSFET
References
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http://www.ece.cmu.edu/~ee321/spring99/
LECT/lect20apr2.pdf
http://wwwinst.eecs.berkeley.edu/~ee130/sp06/chp7full
.pdf
http://www.diodes.com/content_glossary/m
osfet_transistor/
http://www.youtube.com/watch?v=tz62tq_KEc
http://ieeexplore.ieee.org/stamp/stamp.jsp?
arnumber=00100256