EECS 170D Homework #2
Due in class Tuesday October 23
rd
, 2007
Problem 1: Diode Connected Load
VIN
VDD
M1
M2
VOUT
100k
VDD = 2.5V
V
t
= 0.5V
L
M1, M2
= 0.25
μ
m
W
M1
= 1.0
μ
m
W
M2
= 2.0
μ
m
L
S
= 0.25
μ
m
k
n
= 100uA/V
2
λ
= 0 V
1
γ
= 0.2 V
1/2
φ
F
= 0.3V
Consider the inverter circuit shown in Figure above with an ideal squarewave input.
Assume that shortchannel effects are negligible – meaning V
DSAT
>> V
DS
, V
GS
V
T.
a
Find V
OH
, as a simplification, ignore the body effect , i.e.
γ
= 0 V
1/2
b
Now qualitatively (i.e. without equations), explain how V
OH
will deviate from
what you calculated in part (a) if the body effect is taken into consideration.
c
Repeat parts (a) and (b) for V
OL
Hint: Both the load and driver transistors are
NMOS
, so the answer cannot be
2.5V and 0V!
Fall 07
This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentEECS 170D Homework #2
Due in class Tuesday October 23
rd
, 2007
Problem 2: CMOS Inverter Calculations
VIN
VDD
VOUT
1. Calculate: Vm,g, ID(Vm),VIH,VIL,VOH,VOL,NMH,NML
2. Sketch the VTC for the above inverter.
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '08
 staff
 Transistor, γ, λ, EECS 170D Homework

Click to edit the document details