1
2
3
4
5
Valid
R2S
R2S
6
ECE
l0B
l
-. (,-t,
MidtermExam
Winter20l7
circuit below where the drain current through Ml,Mz, and M3 is
designed to be 1mA. Assume Vr = 1V and K' = ZrnA/Vz.
aJ Find the W/L ratio forMZ and the DC voltages at all nodes.
3J Con'sider the
f,r,- !t49
Lp.
't
Rz =
\)a'-
t
M3
72.5kO
t\
41 r-\r \
Ir i-1>
,16
t
^.,
l('*-'''
b/ulq,-'',
vo:$V Vrq, = q +\ =;V
=
<,o Uo = f /
vq -1)SV
t.5V
ls'15
Rr = 27.5kO
4
L
= 1mA
['or*
'
t
f4
ir- /'1
"\'
ti)- ''' ''t1''5-'t;i
u(o\ t
i,nt\ --Y% (u6.
L
\"1
f-,
yI L
U1
t-
L'*
/
LD= -t\
,av
\?
I',t..
rv> -\/-.'-
(ttS-t,t-l)
\*fr - f*
-)\
(-
_ \,
*
\tGt.,
'
\
7,
-,*
-i
t/
i\lst'
z ,! 'r?,
\
(_\
fieft blankJ, draw the small-signal model for the circuit at
the operating foint you found in part a. Derive an expression for the small'
signal gain [A= vo/vi) and evaluate it numerically.
On the next page
rZ
- t)
\. Z-
i lV(:E
v,
-
b)
.,
\)
+
\-- \.sv