1
GATE ECE 1992
Subjective
+8
-0
A combinational circuit has three inputs A, B and C and an output F. F is true only for the following input combinations?

A is false and B is true
A is false and C is true
A, B and C are all false
A, B and C are all true.

(a)Write the truth table for F. use the convention, true = 1 and false = 0.
(b)Write the simplified expression for F as a Sum of Products.
(c) Write the simplified expression for F as a product of Sums.
(d) Draw a logic circuit implementation of F using the minimum number of 2 input NAND gates only.

2
GATE ECE 1992
MCQ (Single Correct Answer)
+1
-0.3
The initial contents of the 4-bit serial-in-parallel-out, right-shift, Shift Register shown in figure is 0110. After three clock pulses are applied, the contents of the Shift Register will be GATE ECE 1992 Digital Circuits - Sequential Circuits Question 66 English
A
0000
B
0101
C
1010
D
1111
3
GATE ECE 1992
MCQ (More than One Correct Answer)
+1
-0.3
Choose the correct satatement(s) from the following:
A
PROM contains a programmable AND array and a fixed OR array.
B
PLA contains a fixed AND array and a programmable OR array
C
PROM contains a fixed AND array and a programmable OR array
D
PLA contains a programmable AND array and a programmable OR array
4
GATE ECE 1992
MCQ (Single Correct Answer)
+1
-0.3
The figure shows the circuit of a gate in the Resistor Transistor Logic (RTL) family. The circuit represents a GATE ECE 1992 Digital Circuits - Logic Families Question 23 English
A
NAND
B
AND
C
NOR
D
OR
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