EE 477L Homework 3
Spring ’09
●
Nazarian
Name: _________________________________________
Lecture 9:30
Assigned: Tuesday Feb. 24, 2009
Due: March 6, 2009
EEB340 at 11am
Score: ________
Show and explain your work clearly and in detail
. Write the parameter units right
beside their numerical values in your equations to show that the final result has the
right unit
(e.g., for N
A
=10
17
1/cm
3
write N
A
/q as 10
17
[cm
3
] / 1.6×10
19
[C] =
10
17
/(1.6×10
19
)
[ 1/(cm
3
C) ] .)
1. Figure 1 shows an enhancedload NMOS inverter. Assume
γ
=0.4, 2
φ
f=0.6V,
V
T0
=0.43V k
n
’=115μA/V
2
and
λ
=0, (Note: all the following questions are adopting
this information unless otherwise stated), calculate V
OH
, V
OL
, V
M
for the inverter and
also the noise margin.
Figure 1
2. Consider a standard CMOS inverter with V
OH
=2V, V
OL
=0.1V, while its V
IH
and V
IL
values are the same as those for the inverter in question 1. Comment on and compare
the robustness of the two inverters.
3. A static CMOS inverter is given with size values W
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 Spring '09
 ShahinNazarian
 NMOS logic, Electronic design

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