1
GATE ECE 2004
MCQ (Single Correct Answer)
+2
-0.6
The minimum number of 2 to 1 multiplexers required to realize a 4 to 1 mutliplexer is
A
1
B
2
C
3
D
4
2
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
The circuit shown in figure converts GATE ECE 2003 Digital Circuits - Combinational Circuits Question 31 English
A
BCD to binary code
B
Binary to excess – 3 code
C
Excess – 3 to Gray code
D
Gray to Binary code.
3
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
The circuit shown in figure has 4 boxes each described by inputs P, Q, R and outputs Y, Z with
Y = $$\,P \oplus \,Q\, \oplus \,R$$
z= $$RQ + \overline P R\, + Q\,\overline P $$ GATE ECE 2003 Digital Circuits - Combinational Circuits Question 30 English The circuit acts as a
A
4 bit adder giving P + Q
B
4 bit subtractor-giving P - Q
C
4 bit subtractor-giving Q - P
D
4 bit adder giving P + Q + R
4
GATE ECE 2001
MCQ (Single Correct Answer)
+2
-0.6
In the TTL circuit in Figure 2.11, $${S_0}$$ to $${S_0}$$ are select lines and $${X_7}$$ and $${X_0}$$are input lines. $${S_0}$$ and $${X_0}$$ are LSB'. The output Y is GATE ECE 2001 Digital Circuits - Combinational Circuits Question 32 English
A
indeterminate
B
A ⊕ B
C
$$\overline {A \oplus B} $$
D
$$\overline C \,(\overline {A \oplus B)} \, + C(A \oplus B)$$
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