Download Past Exam 1 with Answers - Advanced VLSI Design and Applications | ECEN 6263 and more Exams Electrical and Electronics Engineering in PDF only on Docsity! ECEN 6263
Fall 2001
Exam 1
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All questions must be answered on test paper!
Open Book, Open Notes
1. Suppose a certain process has the following parameters.
Rqj = 2882, Ry * 5KG2
Ry) = 9KQ, Ry, * 4KQ
£ = 0.8m
A 4 bus pair static RAM memory cell designed in this process is found to have the fol-
lowing capacitive load on the bit line for each memory ceil attached to the bit line.
Coit’ Newits = 208F +3(8F/um )Fapass
Find the transistor widths Wyeei Wncetts ¥ npass for the 4 bus pair static RAM subject to
the following constraints.
+ Tor each transistor 3pm < W<32pm.
« The read access delay should be as small as possible.
Well wy Ba Wo Vyey,
w, $ as ‘dd - Wav = R :
ms Eas | Tt ™. 2 * 422232
Wet zr , :
Wa past § pu Vay. = R
Ripusd Grva
Read asesss miner )2el bow . .
neell Wa pets AS bs As pusndle
PR Lb - y
mee EE)
od —|
s_ — | S&L Zott
} Rawr Cymer awed -(& <n Maat lam)
tn; w . id Ps: m f 3h “a
needl> 32 sam ) A pase.= V 20230 am - 43
. * AS: Me
Any Wpeuth <3 an 1F 6K
‘BCEN 6263 Fall 2001 Exam | ‘October 4, 2001 . vo :
2. Estimate the delays and power consumption im the circuit below using the RC model
developed in class including the effects of the transistor threshold voltages V7, and
Vyp. Use as parameters the channel sheet resistances and the widths of the six transis-
tors, W;, ..., Wg, and the node capacitances, C;, .... C4. You may assume that the capac-
‘itances already contain all parasitics from the transistors and interconnect.
a See ee yn eee tomowe:
Tnitial voltage across C;?. Va ~ Vig
tn , \
Final voltage across C)?__Q . .
Initial voltage across C5? Vay : /
2 by ay
Final voltage across C2?__ 0
Initial voltage across C;?__O . | ny,
Final voltage across C37. @. 4 ra 2, 7 %
Initial voltage across Cy?__O tf , v
Final voltage across C4?__ Vad 1 | " “L
o G:
Delay from A to X? Rash oa T$
4 ‘
Wok “one = Fu ¢ 1 ar) + 18L\ovy
We,
t
ME TG Yip “fame
Delay from A to Y?
Et py = bsax + ey xy
Va fiw = Rs GV
a
Wh 4s
1 . /
Wy bay Rn “Wy a hat. Raf Reg ¢
avs eo ticks fata Pablla + He
BCEN 6263 Fall 2001 Exam | ‘Genober 4, 2001 2
