Download Past Exam 2 with Resolution - Advanced VLSI Design and Applications | ECEN 6263 and more Exams Electrical and Electronics Engineering in PDF only on Docsity! ECEN 6263
Fall 2000
Exam 2
WRITE YOUR NAME HERE Ans Ww aut
All questions must be answered on test paper!
Open Book, Open Notes
1. Estimate the delays in the circuit below using the RC model developed in class includ-
ing the effects of the transistor threshold voltages Vr, and Vp. Use as parameters the
channel resistances of the six transistors, Rj, ..., Rjg, and the node capacitances, C), ...,
Cs. You may assume that the capacitances already contain all parasitics from the tran-
sistors and interconnect.
1S “it
Shey
Spnel
Poy M7 iL = V3
May | M8 7 mie Cs
Cy
a. Sketch the voltage waveforms for V3 when Vand V> are as shown below. Show the
value of the voltages in the diagram. Assume that V\(t) = Vgq, V(t) = 0 for t<0.
Y
Vad Gna Vag
TL uen bat [tein \ bd
b. What is the delay from V2 to V3 when V> goes from low to high (the first transistion in
44 WM 2 Ry oo
Vv.
Eo 4 Carndtyiy,? - Vv ‘ad Re yy VNR IK
far Ry Fe
tae Rt Ae | Phat (Rte Ce
c. What is the , delay from V, to V3 when V; goes from high to low (the second transistion
in the figure)? Note that there ,oe from V; to V3, one through M9 and one
“te Asstume worst = at iu thee mID ,
4 ¥, v sens 2 (ane turn)
ows aa pee tay? AGE GARARyO
d, What is the delay from V2 to V3 when V> goes from high to low (the third transistion
in the figure)?
£4 44 YW, (yer&)> RQVyurlG Ke)
Vs
: > 4 Vz RG Vid Ce
Ee WyYws Ks t afhyt6)
s
tn
¢ Ls
uM Vo af To
e. What is the delay from V; to V3 when V, goes from low to high (the fourth transistion
in the figure)? Note that there are two paths from V, to V3, one through M9 and one
through M10. — s
vs BiG aM Re + hes
vim G z
ew | FT byouy Mee Ret} ug %)
ne" _& we
pl Boe ete LMU? RG ARG ARES
or
te oy > EG
£.What is the power consumption when V; and y are square waves with frequency f?
bach mn uk above Aang Vy, = f 2 * 2
[VBE & (Qu tyr > luevs)) Navn + Mit 6 Mare)
aw
+ & (amas + Gv ate Mie us) GG Malt Mp +l)
pt ae Vira aMrraG yg +Ce Poy navi VME
a
