final_04

# final_04 - Final Exam ECE 137A Thursday Name Closed Book...

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Final Exam, ECE 137A Thursday March 18, 2004 8-11 AM Name: __________________________ Closed Book Exam: Class Crib-Sheet and 2 pages (4 surfaces) of student notes permitted Do not open this exam until instructed to do so. Use any and all reasonable approximations (5% accuracy), . Show your work: Full credit will not be given for correct answers if supporting work is missing. Good luck Time function LaPlace Transform δ (t) 1 U(t) 1/s e α t U ( t ) 1 s + e t cos ω d t ( ) U ( t ) s + s + ( ) 2 + d 2 e t sin d t ( ) U ( t ) d s + ( ) 2 + d 2 Part Points Received Points Possible Part Points Received Points Possible 1a 15 3a 5 1b 10 3b 8 2a 1 3c 12 2b 2 4a 7 2c 2 4b 7 2d 12 4c 5 2e 8 4d 6 TOTAL 100 1 a

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Problem 1, 25 points Nodal analysis V in V out Q 1 Q 2 R 1 R 2 You will be working on the circuit to the left. Ignore DC bias analysis. You don’t need it. The two transistors have transconductance gm1 and gm2 respectively. Their drain- source resistances Rds1 and Rds2 are both infinity. Part a, 15 points Draw a small-signal equivalent circuit of the circuit 2 a
3 a

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Part b,10 points Find, by nodal analysis, a small-signal expression for: Vout/Vin= __________________ 4 a
5 a

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Problem 2, 25 points You will be working on the circuit below: V in V out Q 1 Q 2 R 1 Q 5 Q 6 Q 3 Q 4 Q 7 Q 8 R 2 R 3 R 4 R 5 R 8 R 6 R 7 R 9 -V ee -V ee +V cc
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## This note was uploaded on 08/06/2008 for the course ECE 137AB taught by Professor Rodwell during the Winter '08 term at UCSB.

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final_04 - Final Exam ECE 137A Thursday Name Closed Book...

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