1
GATE ECE 2002
MCQ (Single Correct Answer)
+1
-0.3
The number of comparators required in a 3-bit comparator type ADC is
A
2
B
3
C
7
D
8
2
GATE ECE 2002
Subjective
+5
-0
It is required to design a binary mod-5 synchronus counter using AB flip-flops such that the output Q2Q1Q0 changes as $$000 \to 001 \to 010$$ ........and so on. The excitation table for the AB flip-flops is given in the table GATE ECE 2002 Digital Circuits - Sequential Circuits Question 11 English 1 GATE ECE 2002 Digital Circuits - Sequential Circuits Question 11 English 2

(a) Write down the state table for the mod-5 counter.
(b)Obtain simplified SOP expressions for the inputs A2, B2, A1, B1, A0 and B0 in terms of Q2, Q1, Q and their complements.
(c) Hence, complete the circuit diagram for the mod-5 counter given in the figure using minimum number of 2-input NAND-gate only.

3
GATE ECE 2002
MCQ (Single Correct Answer)
+1
-0.3
The VSWR can have any value between
A
0 and 1
B
- 1 and + 1
C
0 and $$\infty $$
D
1 and $$\infty $$
4
GATE ECE 2002
MCQ (Single Correct Answer)
+1
-0.3
In an impedance Smith chart, a clockwise movement along a constant resistance circle gives rise to
A
a decrease in the value of reactance
B
an increase in the value of reactance
C
no change in the reactance value
D
no change in the impedance value
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