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Fall 2003
Exam 1
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All questions must be answered on test paper!
Open Book, Open Notes
1. A certain process has the following parameters for the BSIM current equations.
toy = 0.014m
2 = 35x10 Fm
8s, = 1.4010 "Bem
u, = 0.045 m2/(V-see)
Hy = 0.016 m7/(V-sec)
Fp, = O.7V
Vp, = -0.9V
a
Voor = 13x10" m/sec
Anu = 14
Answer the following questions for an nMOSFET with W=1.2pm, L=0.6,um.
a, What is «?
3.0K0" on -4 OE
= we x= = 004s ¥ == |, fzy%Xio
oO DHL KIT? an Ve Seg
b, What is the eritical electric field for velocity saturation, E,,,?
= 2 Vist z( iste") Wee =
bygh Reap et,
ie
n
>
yon
ECEN 6263 Fall 2003 Exam 1 October 7, 2003
38 ¥ What is Pps. when Mog = SV? Use the results of previous arts when appropriate.
Vor = Wer Val Gate [5-7 psirh cot mbH em fn tie
Way, +A Gad-k (g-0-7)4 1 LG poKe os PEErO™ py Te
= herge V
4 d, What is Jp when Vpg= 1V?. Use the results of previous parts when appropriate.
Veseiv <igree feh nn fog vy
rk (We Vr) bos~ A Mot : presse fal sev). Pi XD
14 Vos t
ark Topp
Bou i Sap fie Piss
¥ rb | yy
Bete 78 me ia, AG UOT he = 620TH oKe! A
= 34uey
4 e. What is Jy when ps =3.5V? Use the results of previous parts when appropriate.
Dy: Kes \N [ { \Man: Vi) } ( ie Mes Ss a
GeV tA Sterne te
= >
_ “y u . (4 3y* 1. RITE F oe
NSM STE (fone?) | NS oe
za 4st tee CF H 68) 61ST Rk
= 7 e? GS kat va
Answer the fallawing questions for an pMOSFET with W=1.2um, L=0.6um.
3 £. What is 1 ?
K = Mp Bx = aA BIbY
™“
ECEN 6263 Fat! 2003 Exam § October 7, 2003 2
3. Estimate the delays in the cireuit below using the RC model developed in class includ-
ing the effects of the transistor threshold voltages Vy, and Vy, Use as parameters the
channel sheet resistances and the widths of the transistors, 7”), ..., #4, and the node
capacitances, C}, Cy. You may assume that the capacitances already contain all para-
sities from the interconnect, but not the transistor sate capacitance.
a. Answer the following when B = 0 and A goes fram 0 to 1.
Draw the equivalent RC switching circuit including transistor gate capacitance.
1 What is AV,?
What is AV, ?
“]) Whats APY?
What is AV,?
ECEN 6263 Fall 2003 Exam t October 7, 2003
wu
What is the delay from A tu Y?
3 ay th 2 Roa avy + (e, APG AK t RG OY -2\4)
BIS Gaon, (My ~ON8) RHR) Gz Ce 2N6)
4 th 2 RG +R APCs VasVorl + 2R, GA
+ Ri Caaf, + (RAR) Gy), Vita sel
Ig
b.Answer the following when B = 0 and A goes from 1 to 0.
Draw the equivalent RC switching circuit including transistor gate capacitance.
a
ve a
A q
wv
eee
“Ssh TTL -
) Whatis av,2 ~Via . TS
|
j Whatis AV,?7 O \
p> Whatis av, Yia-[Vsy!
) Whatis AV? Vy
What is the delay from A to Y?
4 Avy bt, 5 Ry Cove 4 RAY \G avy + Re Wy (e% -DVA)
+ RC yy (AVK-2MBD {R37 RGA (Orr— av'p)
_ Vaan \ :
y 4d = Ryd “Gear +R +8) Qe Ky Cah 2ouMarl
vad
+ Fe Ga fo veh n\ise A(R, +t PN 95 y,
ECEN 6263 Fall 2003 Exam 1 a October 7, 2003 6
