ELEC201 Digital Electronics Page 1 of 6 Excelsior College Module 2: Laboratory 2: Combinational Logic Circuit Design Objectives The objectives of this experiment are to: • Examine the relationship between a Boolean expression and a combinational logic circuit. • Convert Boolean equations into combinational logic circuits. • Determine the function of a combinational logic circuit. Introduction A combinational logic circuit consists of several logic gates connected in such a way that multiple digital inputs are reduced to one or more (in general, fewer) outputs. In this experiment we will examine several combinational logic circuits and their operation. Procedure 1. Load the circuit E4-1.MS7, shown in Figure 4.1. Figure 4.1: Simple combinational logic circuit 2. Determine the truth table for the circuit by simulation. To do this, add 0/1 switches on the A and B inputs and a logic indicator on the F output. A B F 0 0 0 1 1 0 1 1 Table 4.1: Truth table for circuit E4-1.MS7 javascript:showPage(-1,%20-1,%20-1,%20'/module_4/e4-1.ms7',%20'WEBCT_NO_ANCHOR_VALUE',%20'3'); Module 2: Laboratory2: Combinational Logic Circuit Design Page 2 of 6 3. Open the Logic Converter ( ). When minimized, it looks like Figure 4.2(a). Figure 4.2(b) shows the actual instrument and its controls. Figure 4.2(a): Logic Converter minimized icon Figure 4.2(b): Logic converter details The Logic Converter allows you to enter a truth table and generate its associated Boolean expression and/or combinational logic circuit. To begin, left-click inside the circles under A and B at the top of the Logic Converter. Its display should look like Figure 4.3 when you have done this. Module 2: Laboratory2: Combinational Logic Circuit Design Page 3 of 6 Figure 4.3: Setting up a 2-input truth table 4. Now the 0's and 1’s in the output column must be added. This is accomplished by left-clicking on the? until it becomes the value required (0, 1, or X which means don't care). For our example, enter 1’s on the middle two lines of the truth table and 0's in the first and last lines. Your display should look like Figure 4.4. Figure 4.4: Truth table ready for conversion 5. The six conversion buttons on the Logic Converter allow you to convert between equations, truth tables, and logic circuits. Clicking the second button from the top displays the Boolean equation for the truth table in the lower display window, as indicated in Figure 4.5. Module 2: Laboratory2: Combinational Logic Circuit Design Page 4 of 6 Figure 4.5: Boolean equation for truth table Notice that the Logic Converter uses a single quote after a variable instead of an overbar to indicate inversion. The equivalent Boolean expression, with overbars, is: Which is the expanded version of the simpler expression: 6. Left-clicking the second-to-last button converts the Boolean equation into an actual combinational logi ...

1. ELEC201 Digital Electronics
Page 1 of 6
Excelsior College
Module 2: Laboratory 2: Combinational Logic Circuit Design
Objectives
The objectives of this experiment are to:
• Examine the relationship between a Boolean expression and a
combinational logic
circuit.
• Convert Boolean equations into combinational logic circuits.
• Determine the function of a combinational logic circuit.
Introduction
A combinational logic circuit consists of several logic gates
connected in such a way that
multiple digital inputs are reduced to one or more (in general,
fewer) outputs. In this experiment
we will examine several combinational logic circuits and their
operation.
Procedure
1. Load the circuit E4-1.MS7, shown in Figure 4.1.

2. Figure 4.1: Simple combinational logic circuit
2. Determine the truth table for the circuit by simulation. To do
this, add 0/1 switches on the A
and B inputs and a logic indicator on the F output.
A B F
0 0
0 1
1 0
1 1
Table 4.1: Truth table for circuit E4-1.MS7
javascript:showPage(-1,%20-1,%20-1,%20'/module_4/e4-
1.ms7',%20'WEBCT_NO_ANCHOR_VALUE',%20'3');
Module 2: Laboratory2: Combinational Logic Circuit Design
Page 2 of 6
3. Open the Logic Converter ( ). When minimized, it looks like
Figure 4.2(a). Figure 4.2(b)
shows the actual instrument and its controls.
Figure 4.2(a): Logic Converter minimized icon

3. Figure 4.2(b): Logic converter details
The Logic Converter allows you to enter a truth table and
generate its associated Boolean
expression and/or combinational logic circuit. To begin, left-
click inside the circles under A and
B at the top of the Logic Converter. Its display should look like
Figure 4.3 when you have done
this.
Module 2: Laboratory2: Combinational Logic Circuit Design
Page 3 of 6
Figure 4.3: Setting up a 2-input truth table
4. Now the 0's and 1’s in the output column must be added. This
is accomplished by left-clicking
on the? until it becomes the value required (0, 1, or X which
means don't care). For our example,
enter 1’s on the middle two lines of the truth table and 0's in the
first and last lines. Your display
should look like Figure 4.4.
Figure 4.4: Truth table ready for conversion
5. The six conversion buttons on the Logic Converter allow you
to convert between equations,
truth tables, and logic circuits. Clicking the second button from
the top displays the Boolean

4. equation for the truth table in the lower display window, as
indicated in Figure 4.5.
Module 2: Laboratory2: Combinational Logic Circuit Design
Page 4 of 6
Figure 4.5: Boolean equation for truth table
Notice that the Logic Converter uses a single quote after a
variable instead of an overbar to
indicate inversion. The equivalent Boolean expression, with
overbars, is:
Which is the expanded version of the simpler expression:
6. Left-clicking the second-to-last button converts the Boolean
equation into an actual
combinational logic circuit, as indicated in Figure 4.6.
Module 2: Laboratory2: Combinational Logic Circuit Design
Page 5 of 6

5. Figure 4.6: Combinational logic circuit generated by equation
7. Repeat steps 4 through 6 for a truth table containing three
inputs (A, B, and C). Ones are
required on lines 0, 3, 4, and 5.
8. Repeat step 7 except left-click the third button down
(containing SIMP) to simplify the
Boolean expression. Are there fewer terms? Is less logic
required? Does the circuit operate
correctly?
9. The Logic Converter is also capable of determining the truth
table (or Boolean equation) for a
supplied circuit. Open circuit E4-2.MS7, which indicates the
necessary connections (see Figure
4.7).
Figure 4.7: Test circuit for Logic Converter
13. Open the Logic Converter and left-click the first conversion
button. Record the truth table
determined by the Logic Converter.
A B F
0 0
0 1
1 0
1 1

6. Table 4.2: Truth table for circuit E4-2.MS7
Discussion
While reviewing your data and results, provide detailed answers
to each of the following:
javascript:showPage(-1,%20-1,%20-1,%20'/module_4/e4-
2.ms7',%20'WEBCT_NO_ANCHOR_VALUE',%20'3');
Module 2: Laboratory2: Combinational Logic Circuit Design
Page 6 of 6
1. What basic logic function is being performed by the circuit in
step 1 (Figure 4.1)?
2. What is the advantage of simplifying a Boolean equation?
3. What basic logic function is being performed by the circuit in
step 9?
4. How is the Logic Converter used to determine the Boolean
expression for a
combinational logic circuit?
Running Head: WAL-MART 1
WAL-MART 3

7. Wal-Mart
Student’s Name
Institution
Just in Time (JIT) ordering enables Wal-Mart to lessen the costs
linked with inefficient inventory decisions and handling. Based
on research, it is clear that ordering and sales are more closely
associated because they decrease the intensity of Bullwhip.
Wal-Mart Company employs JIT in a number of ways. For
instance, the organization uses JIT to offer clients an every-day-
low-price largely in part. This is because JIT enables to control
efficiency. JIT has a great influence over its suppliers and often
pressures that enable the organization to earn suitable profits.
The company pioneered JIT inventory concept in order to
deliver what is needed. The company relies of technology in
order to enhance change that can effectively enhance the growth
and development of the business. The JIT is used by the
management of the company to control costs and ensure
consistent cash flow during economic difficulties. JIT
inventory models assist vendors to meet their inventory
challenges (Pride, Hughes, & Kapoor, 2010).
I find JIT as a tool of management because it has enhanced the
way the organization does its business. With the knowledge of
JIT, better management and understanding of inventory is
attained. For instance, the organization has managed to increase
its supplier’s inventory levels. Wal-Mart JIT efforts are leaving
their suppliers with extra inventory. The demands that the
company places on its suppliers are incredible because of the
power the company on its suppliers. The model has optimized
inventory management and flow that was originally made
famous by large organizations such as the Wal-Mart. Wal-Mart
is a good example of an organization that has utilized the JIT
Model. Instead of having huge holding costs, the company

8. minimizes product-ordering costs with each vendor. This gives
the company a greater cash flow and better inventory control
(Pride, Hughes, & Kapoor, 2010).
References
Pride, W. M., Hughes, R. J., & Kapoor, J. R. (2010). Business.
Australia: South-Western/Cengage Learning.
ELEC201 Lab Format
1. Title Page
1.1 University Name
1.2 Course Name
1.3 Semester
1.4 Experiment Number
1.5 Experiment Title
1.6 Your Name
1.7 Instructor’s Name
1.8 Date Submitted
2. Problem Statement Page(s)
2.1 Title
2.2 Objective
2.3 Problem Statement
2.4 System Diagram(s) if any
3. Theoretical
Solution

9. Page(s)
3.1 Problem Analysis
3.2