Arithmetic-only calculator is accepted.. Show ALL intermediate work if any, NOT just answers.. Find the expression of with respect to b.. Find the expression of with respect to
Trang 1I NTRO TO E LECTRICAL AND C OMPUTER E NGINEERING (ECE110)
F INAL E XAMINATION
Semester 1 – Academic year 2011-2012
Duration: 90 min
INSTRUCTIONS:
Books and notes are accepted
No computers Arithmetic-only calculator is accepted
Show ALL intermediate work (if any), NOT just answers
Do NOT communicate with any other students
Answer on this question sheet
Q1 (1 point) Use the “large signal” model for diodes, find V d1 , I d1 , V d2 , and I d2 Assume that V ON = 0.7 V
ID#
Department of Electronics Engineering
Dr Hoang Trang
Instructor
Dr Le Chi Thong
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Trang 2Q2 (2 points) V BEON = 0.7 V, V CESAT = 0.2 V, β = 100, V cc = 12 V, I c = I e = β.I b
a Find the expression of with respect to
b Find the expression of with respect to
c Find the expression of the saturation collector current
d Calculate the values in the following table
V IN (V) I b (μA) I c (mA) V out (V) BJT state 0.6
1.0 3.0 10.0
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Trang 3Q3 (2 points) Given the diagram circuit
a Find the expression of the output F
b Create the truth table of F
c Given the waveform of A, B, C, and D, find the waveform of F
A
B
C
D
F
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Trang 4Q4 (2 points) ( ) ̅ ̅̅̅̅̅̅̅̅̅̅̅̅̅̅̅ ̅
a Find the SOP expression of the function F
b Rewrite the function F in the canonical SOP form
c Rewrite the function F in the Σ form
d Using the result in (a), draw the diagram circuit
Q5 (1 point) Minimize the following function using K-map
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Trang 5Q6 (2 points) A combinational circuit receives signals from 4 switches A, B, C, and D It is also
connected to an LED The LED will be ON if at least two switches next to each other are ON
a Express the function of the output in a truth table
b Minimize the function and design this combinational circuit using NAND-NAND circuit
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