1
GATE CSE 2003
MCQ (Single Correct Answer)
+5
-1.5
Consider the following circuit composed of $$XOR$$ gates are non-inverting buffers. GATE CSE 2003 Digital Logic - Boolean Algebra Question 16 English 1

The non-inverting buffers have delays $${\delta _1} = 2$$ $$ns$$ and $${\delta _2} = 4$$ $$ns$$ as shown in the figure. Both $$XOR$$ gates and all wires have zero delay. Assume that all gate inputs, outputs and wires are stable at logic level $$0$$ at time$$0.$$ If the following waveform is applied at input $$A$$, how many transition(s) (change of logic levels) occurs(s) at $$B$$ during the interval from $$0$$ to $$10$$ $$ns?$$

GATE CSE 2003 Digital Logic - Boolean Algebra Question 16 English 2
A
$$1$$
B
$$2$$
C
$$3$$
D
$$4$$
2
GATE CSE 2002
Subjective
+5
-0
Express the function $$f( x, y, z)= xy'+ yz'$$ with only one complement operation and one or more $$AND/OR$$ operations. Draw the logic circuit implementing the expression obtained, using a single NOT gate and one or more $$AND/OR$$ gates.
3
GATE CSE 1996
Subjective
+5
-0
A logic network has two data inputs $$A$$ and $$B,$$ and two control inputs $${C_0}$$ and $${C_1}$$. It implements the function $$F$$ according to the following Table. GATE CSE 1996 Digital Logic - Boolean Algebra Question 20 English

Implement the circuit using one $$4$$ to $$1$$ Multiplexor, one $$2$$-input Exclusive $$OR$$ gate, one $$2$$-input $$AND$$ gate, one $$2$$-input $$OR$$ gate and one Inverter.

4
GATE CSE 1991
Subjective
+5
-0
Find the minimum sum of products form of the logic function
$$f\left( {A,B,C,D} \right) = \sum d \left( {3,11,12,14} \right)$$
Where $$m$$ and $$d$$ denote the minterms and don't cares respectively.
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