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EEE335/EEE348 (analogue): Coursework.
The Task
Your task is to design an amplifier, simulate it in LTSPICE, and assess its performance. You may choose any
of the amplifiers featured in the course material, or beyond, *apart from the two-stage differential
amplifier covered at the end of the course*. Your design should be actively loaded so that it is suitable for
implementation as an IC.
The transistors in your amplifier should be taken from the following table:
Technology node (L): 0.8 m 0.35 m 0.18 m
NMOS PMOS NMOS PMOS NMOS PMOS
o( ) 0.8 -0.9 0.57 -0.71 0.45 -0.45
, ( A 2) 92 30 190 55 270 70
L ( m ) 0.12 0.08 0.16 0.16 0.08 0.08
x ( m) 18 18 8 8 5 5
do, so/ ( F/ m) 0.2 0.2 0.2 0.2 0.35 0.35
You are free to choose the power supply voltage from the range 1.33-6V and the channel width, W, for
the transistors in your design (the channel length, L, is as indicated in the ‘technology node’ row of the
table).
You will need to submit a report, (6 pages maximum,11pt text, normal margins) to include the following:
Introduction
A description of your amplifier aims and specifications: what are its key properties, what
applications might it be used for
Design and Methodology
An analysis and justification of the biasing of your design.
A clearly labelled diagram of your amplifier design from SPICE (ensure the labelling are readable).
A small signal model of your amplifier.
An assessment of the small signal performance of your amplifier, including your estimates (arrived
at by hand calculations) of maximum signal levels, maximum signal swing, voltage headroom
requirements, mid-band gain, output resistance and upper cutoff frequency.
Results
Plots and results from appropriate simulations together with an assessment of the accuracy of your
hand calculations and logical written interpretation of your results.
Discussion and Conclusion
A discussion on how realistic your model is: what is not included and how might these additional
features effect the performance of your amplifier Improvement(s) to your design, e.g. better
current mirror(s).
You also need to submit a functioning LTSpice schematic file (this does not form part of the assessment,
but I may simulate it if I think there is an issue with your design).
Please, also, quote the last 3 digits of your Student Number in your report.
The deadline for submitting the report and the LTSpice schematic file is Sunday 8th January 2024 at
23:59pm.
Rubric for Assessment
Your report (and work) will be assessed according to the following rubric:
Category An excellent report will… Weighting
Technical
content
Introduction Set out your project’s aims and specification. 15%
Design and
methodology
Explain how you designed your circuit and
optimized it, so that someone reading your report
could repeat your work.
Justify your design decisions with relevant
information.
25%
Results
Present a set of results that enable you to
assess your design against the project aims and
specification.
Provide a logical written interpretation of your
results.
20%
Discussion
and
conclusions
Critically compare your results against the
project aims and specification.
Comment on any shortcomings of your design,
and discrepancies from theory
Summarise your project and highlight the key
achievements.
15%
Style
Structure and
formatting
Follow a logical, narrative structure.
Be professional, with appropriate use of fonts,
contents and title pages, paragraphs, sections,
sub-sections etc.
5%
Figures and
plots
Use figures and plots that are correctly sized,
clear, well-labelled, and captioned.
Make intelligent use of figures, with each figure
adding detail and information that would be
difficult or impossible to convey in writing.
10%
Writing clarity Make good use of English and be easy to read. 5%
Referencing
Provide appropriate, IEEE-formatted references.
Use references to websites only when book or
journal references are not available.
5%
REMEMBER: This is a graded assessment, where a score of 50% equates to a 1st. You will need
to demonstrate real understanding of the material to access the higher marks.
Kennedy Offor (06/11/23)