Coursework, Engineering and Construction

The coursework requires the submission of a single

report which contains two

elements which together contribute 50% to the overa

ll module mark. The marks

shown indicate the maximum possible marks that each

individual element

contributes to the final module mark.

The finished report should be submitted to the res

ource centre (Prospect

Building, St Peter’s) by the hand-in date shown abo

ve.

Coursework 1

(25%)

Write an essay about the different technologies whi

ch have been used to

implement logic systems both in the past and the pr

esent. Your essay

should be supported by references throughout.

Coursework 2

(25%)

This requires a section in the report detailing you

r solutions to the following

questions :

Q1. The presence of a 10V supply is to be indicated

using a LED whose forward bias

voltage is 2.8V and maximum operating current is 2

0mA.

a) Evaluate the highest intensity solution possibl

e using

series LED’s. (3%)

b) Design a parallel LED solution which uses 5

LED’s.

(3%)

Continued overleaf

Page 2 of 2

Q2. The N-type MOSFET transistor in the following c

ircuit has the

characteristics shown below :

a) If it is to feed a drain load resistor of 250

?

with a current of

10mA, what will be output voltage, V

DS

, and input voltage, V

GS

,

required?

(3%)

b) What value of R would be required to operate wi

th a V

DS

of 1V

and a V

GS

of 5V ?

(3%)

Q3. For the following logic circuit :

a) Identify the Boolean expression that describes

it. (3%)

b) Sketch its Karnaugh Map (3%)

c) Determine a NAND implementation of it (3%)

Q4. a) Find the binary, octal and hexadecimal equiv

alents to the

decimal number 110. (3%)

b) Evaluate the sum of the binary numbers

10101101

2

and

1100100

2

and check your solution in decimal. (3%)

A

F

B

C

0V

V

DS

5V

R

V

GS

0 1 2 3

4 5

20

15

10

5

0

V

GS

(V)

5

4

3

1

2

I

D

(mA)

V

DS

(V)

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