January 2014
Intermediate to advanced
567 pages
23h 13m
English
Content preview from Principles of Analog Electronics
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Principles of Analog Electronics
308
➜ Ohmic or triode, or linear region
conditionv Vv
current iKvV
vv
: 0
: 2
GS th DS
DS nGSthD
SD
S
2
()
−> >
=−−
➜ Saturation region
:0
: 1
2
conditionvVv
current iKvV v
GS th DS
DS nGSt
hD
S
()
()
<−<
=−+λ
.
The blue line in Figure 8.58 for which
vVv
GS th DS
−=
separates ohmic and satura-
tion regions.
Observation
The λ parameter is very often ignored due to its low value, which depends on
the channel length and is typically
10
10 1/v
31
≤λ≤[]
−−
.
The following is a MATLAB
®
routine to graph an example of the I–V characteristic
of a MOSFET (Figure 8.59), neglecting the overall contribution of λ, and assuming
=[
]
−
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