HOMEWORK 7, SECTION 1 and 2, DUE WED 28
at 5:00 pm mailbox located in
EE002
′
Κ
ν
2
Ω
Λ
1)
An NMOS transistor has parameters V
TN
= 0.8V, k’
n
= 40
μ
A/V
2
, and
λ
= 0, (a)
Determine the widthtolength ratio (W/L) such that g
m
= 0.5 mA/V at I
D
= 0.5mA
when biased in the saturation region. (b) Calculate the required value of V
GS
.
2)
A PMOS transistor has parameters V
TP
= 1.2V, k’
p
= 20
μ
A/V
2
, and
λ
= 0, (a)
Determine the widthtolength ration (W/L) such that g
m
= 50
μ
A/V at I
D
= 0.1mA
when biased in the saturation region. (b) Calculate the required value of VSG.
3)
An NMOS transistor is biased in the saturation region at a constant V
GS
. The drain
current is I
D
= 3mA at V
DS
= 5V and I
D
= 3.4mA at V
DS
= 10V. Determine
λ
and r
d
.
4)
The minimum value of smallsignal resistance of a PMOS transistor is to be r
d
=
100 k
Ω
. If
Ι
D
= 3mA at V
DS
= 5V and I
D
= 3.4mA at V
DS
= 10V. Determine
λ
p
and then the maximum I
D
for r
d
at V
DS
= 10V
5)
Calculate the smallsignal voltage gain v
o
/v
s
of a commonsource amplifier, such
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 Fall '08
 Staff
 Transistor, Trigraph, NMOS Transistor, nchannel enhancement MOSFET

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