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Summer
2015
SEMESTER-I
SUBJECT
CODE & NAME
BCA1040,
DIGITAL LOGIC
CREDIT-4
BK
ID-B0948
MAX.
MARKS-60
Q1.
Solve each of the following 4-bit subtraction problems using 2's complements
representation.
i.
(00110)2-(00101)2
ii.
(0111)2-(0001)2
Solution.
Now let's consider how
we would solve our problem of subtracting using 2's complement.
Q2.
What is
difference between minterm and maxterm? Express the following function:
F(x,y,z)=(x+y)z
in the form of minterm and maxterm.
Solution.
Minterm: Each row of a truth table can be associated with a minterm, which is a product (AND) of all
variables in the function, in direct or complemented form. A minterm has the
property
Q3.
Draw
truth table of following boolean function:
a)
F(x,y)=(x+z)y
b)
F(x,y)=xy+xy'
Answer.
a) Truth
Tbale for F(x,y)=(x+y)z
=xz+yz
=x(y+y')z+(x+x')yz
=xyz+
Q4.
Simplify
the boolean function using k map:
F(A,B,C,D)=∑m(0,2,3,5,6,7,8,10,11,14,15)
Solution.
The given function is:
F(A,B,C,D
Q5. What
is combinational circuit? Explain differences between sequential circuits and combinational
circuits.
Answer:
combinational circuit:
Combinational circuit is a circuit in
which we combine the different gates in the circuit, for example encoder,
decoder, multiplexer and demultiplexer. Some of the characteristics of
combinational circuits
Q6.
What is difference between Ring Counter and Johnson counter?
Answer.
Ring
counter
A ring counter is a
shift register (a cascade connection of flip-flops) with the output of the last
one connected to the input of the first, that is, in a ring. Typically a
pattern consisting of a single 1 bit is circulated
Get fully solved assignment. Buy online from website
online store
or
plz drop a mail with your sub code
we will revert you within 2-3 hour or immediate
Charges rs 125/subject and rs 500/semester only.
if urgent then call us on 08791490301, 08273413412
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