essay and coursework

EAT117 Electronic Principles

The coursework requires the submission of a single report which contains two
elements which together contribute 50% to the overall 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 resource centre (Prospect
Building, St Peter’s) by the hand-in date shown above.

Coursework 1                          (25%)

Write an essay about the different technologies which have been used to
implement logic systems both in the past and the present.  Your essay
should be supported by references throughout.

Coursework 2                          (25%)

This requires a section in the report detailing your 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 20mA.

a)  Evaluate the highest intensity solution possible 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 circuit has the
characteristics shown below :

a)  If it is to feed a drain load resistor of 250Ω 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 with 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 equivalents 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%)

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