CT Department
LOGIC CIRCUITS
Worksheet No. 2: Combinational Circuit
Date: 04/26/2022
Student Name:
ID # 1202453
Objectives
Kelvin Mark D. Banogbanog
: Given the resources, upon completion of the activity, the
student must be able to:
1. Look back on the functions and uses of the Combinational Circuit
and its Truth Table.
2. Mind map and solve the combinational circuit provided and its
Truth Table.
3. Learn and appreciate the value of the Combinational Circuit and
its Truth Table.
Background :
What is a Combinational Circuit?
A combinational logic circuit is a
circuit whose outputs only depend on
the current state of its inputs. In
mathematical terms, each output is a
function of the inputs. These functions
can be described using logic
expressions but is most often (at least
initially) using truth tables.
What is a Truth Table?
A truth table is a mathematical table that lists the output of a particular digital
logic circuit for all the possible combinations of its inputs. These truth tables can
be used to deduce the logical expression for a given digital circuit and are used
extensively in Boolean algebra.
Example of a truth Table:
X
Y
(OFF)
0
0
(ON)
1
1
Activity:
Solve the combinational circuit. Provide the values of C, D, E, F, and Z in the truth table
below.
Truth Table:
A B C D E
F
Z
0
0
1
1
0
0
0
0
1
1
0
0
1
1
1
0
0
1
1
0
1
1
1
0
0
0
0
0
Reflection:
Combinational circuits are used to model logic functions. A combinational gate is
a function that produces a specified output based on the inputs. Truth tables can be used
to define combinational circuits. If the combinational gate inputs are legitimate input
values, then the combinational circuit outputs are valid output values.
The most significant aspect of a combinational circuit is that its output value is
determined by the input values. A combinational circuit can include more than two
logical inputs, as well as numerous inputs. Combinational circuits may be both simple
and sophisticated. Using simple Boolean functions, complex combinational circuits are
coupled using simple gates. Combinational circuits are made up of genuine
semiconductor components that reflect the logic function of the input, resulting in a
specified output value. A combinational circuit can have more than two logical inputs and
many inputs. Combinational circuits may be both simple and sophisticated. Complex
combinational circuits are connected utilizing basic gates and simple Boolean functions.
Combinational circuits are constructed using actual semiconductor components that
mirror the logic function of the input, yielding a specific output value. The clock period
has a direct influence on design performance in sequential circuits. The minimum clock
period is determined by the propagation delay of the combinational portion. As a result, it
has a direct influence on the overall system performance. A sequential circuit typically
requires a few clock cycles to complete its related job. Design delay is the maximum
number of needed clock cycles. The combinational portion also has a direct influence on
the accompanying sequential circuit's delay. As a result, understanding how to create an
efficient combinational circuit in HLS is the first step in designing a high-performance
algorithm on hardware.
The first stage in building an algorithm or a system controller in HLS is to design
an efficient combinational circuit. To explain the combinational component of a
complicated algorithm, several optimization approaches and coding styles are available.
Output:
Must be Submitted together with the Worksheet in .docx file format
Grading
:
Worksheet will be graded according to the following weights:
Skills
Truth Table
Reflection
Weights
40%
Rating
60%
Grade:
Equivalent Grade