Assignment title: Information
ASK 1: (LO4.1)
a) Using Manufacturer's datasheets complete the table below using Nominal values for the logic families.
LS TTL ALS TTL CMOS HCMOS
VIL
VIH
IIL
IIH
VOL
VOH
IOL
LOH
Fan-out
Noise Margin
b) Define the terms Fan-out and Noise Margin.
TASK 2: (LO4.2a & LO4.3a) Using simulation software
Design a circuit whose output goes HIGH when its inputs are: A is high and B is low and either input C or input D is also HIGH.
Procedure:
a) Derive a Boolean that describes the performance of the required circuit.
b) Rearrange the expression in Sum-of-Products (SOP) form.
c) Using simulation software, Draw the circuit diagram and simulate its operation.
d) Produce a four-variable truth table and apply all combinations of
input variables to the circuit and each time note the logical state.
e) Demonstrate the circuit operation to your tutor.
A B C D F
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
Opportunity for Distinction (Part A) (Both Part A and Part B must be completed for D2)
Demonstrate, with photographic evidence, that you have simulated the circuit in Task 2 .D2
Opportunity for Merit
Use Karnaugh Maps to check the SOP found in task 2 Part B, is equivalent to the original Boolean expression, found in Part a. M2
TASK 3: (LO4.2b & LO4.3b)
a) Design a 4 bit asynchronous counter using JK flip flops to count between 2 and 9. Your design must include:
Flow diagram
Sequence table
Karnaugh maps
b) Using a Multisim, construct the counter and demonstrate to your Tutor.
Opportunity for Merit
Produce a report containing the information found for TASKs 2 and 3. You will need to use a variety of word processing features and circuit diagrams created in Multisim. You will also need to use engineering language correctly. M3
Opportunity for Distinction:
(Part B) (Both Part A and Part B must be completed for D2)
Demonstrate, with photographic evidence, that you have built the circuit in Task 3.