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If you should fail this module you will be permitted to be re-assessed on up to three
occasions. If you fail to attend or to submit work for re-assessment at the next opportunity
you will be deemed to have exhausted one of the opportunities.
Faculty of
Technology, Engineering and the Environment
In-Course Assessment Brief
Undergraduate Programme
Academic Year 2009/2010
Module:
Analogue Electronics D2
Assessment Title:
Investigation and Design of Common Emitter Amplifer
Assessment Identifier:
CWK1
School:
Computing, Telecommunications and Networks
Module Co-ordinator:
Gurvinder Dubb
Assessment Details and Deadlines:
See ECMS My Course on the intranet.
Brief Assessment Details
You are required to investigate and design a Common Emitter Amplifier. Write a comprehensive technical report on the design of a Common Emitter Amplifier circuit..
IMPORTANT STATEMENT
Plagiarism: the presentation of the work of another (from whatever source: book, journal, internet etc) as if it were one’s own independent work. This can be anywhere on a continuum ranging from sloppy paraphrasing to verbatim transcription without crediting sources.
You are advised to refer to the Student Handbook on matters of cheating and plagiarism as they relate to coursework, group assignments, class tests and examinations. Both cheating and plagiarism are totally unacceptable and the University maintains a strict policy against them. It is YOUR responsibility to be aware of this policy and to act accordingly.
The University requires that the following statement is included in all module documents.
“You are reminded of the University Disciplinary Procedures which refer to cheating. Except where the assessment of an assignment is group-based, the final piece of work which is submitted must be your own work. Close similarity between assignments is likely to lead to an investigation for cheating. It is not advisable to show your completed work to your colleagues or to share and exchange disks.
You must also ensure that you acknowledge all sources you have used. Work which is discovered to be the result of collusion or plagiarism will be dealt with under the University’s Disciplinary Procedures, and the penalty may involve the loss of academic credits.
If you have any doubts about the extent to which you are allowed to collaborate with your colleagues, or the conventions for acknowledging the source you have used, you should first of all consult module documentation and, if still unclear, your module tutor.”
You will be asked to confirm in writing when handing in any piece of assessed work that it is your own by completing the Coursework Submission & Record Form which should be printed from ECMS My-course on https://mytid.bcu.ac.uk/.
It is the STUDENT’S responsibility to accurately complete the form and comply with its rules and guidance as described in the student handbook for this academic year.#p#分页标题#e#
Learning Outcomes to be Assessed:
1. Analyse the properties and characteristics of a transistor circuit amplifier configuration.
2. Analyse the operation of a Common Emitter Amplifier.
3. You need to carry out a theortical analysis of the quiescent operating points and small signal analysis on circuits.
Assessment Details:
Refer to attached sheets for further details and a table of assessment criteria and assoicated grading criteria.
Assessment Criteria:
1. Design calculations of the Common Emitter Amplifier circuit.
2. Discussion the theoretical investigation of the small signal characteristics of CE amplifier Circuit.
3. Discuss and evaluate the significances of the results.
4. Write a concise technical report detialing the design and theoretical testing of the CE amplifier
Undergraduate – BEng Modular Degree program
Analogue Electronics UG2
Referral Assignment 1
DESIGN AND INVESTIGATION OF A
COMMON-EMITTER AMPLIFIER CIRCUIT
Aim: www.ukasssignment.org
To design, investigate and theoretically test a common emitter (CE) amplifier circuit.
Technical specification
A Common Emitter Amplifier is to be designed that must meet the following specification:
Power Supply – 16 V dc.
The collector resistor RC = 5 kΩ.
Quiescent operating points are collector current IC = 1 mA and collector emitter voltage VCE = 10 V.
The dc current gain of the silicon transistor hFE (β) = 50.
Assume base emitter voltage VBE = 0.6 V.
Assume that the current flowing through resistor R1, should be 0.1IC, hence I1 = 0.1 mA
Brief Assignment Details
1. Calculating the resistor values, R1, R2 and RE for the circuit shown in Figure 1.
2. The transistor in the circuit shown in Figure 1 is replaced by one with an hFE =100. Calculate the new quiescent operating points for IC and VCE. Also comment on the stability of the circuit.
3. Discuss how you would theoretically test the circuit by producing a test plan to design prove the circuits operation.
4. Discuss the small signal characteristics of the common emitter amplifier circuit relating to the following points:- Bias required giving a selected quiescent operating point on the output characteristic. The effect of a small sinusoidal current input on the quiescent condition. Voltage phase inversion occurs between the input and output signals in a common emitter amplifier circuit. Discuss the construction of the load line on a set of output characteristics of a common emitter amplifier circuit for a stated value of the collector resistor. Discuss the estimation of the rms voltage output from the load line for given quiescent conditions and a given input signal.
5. Write a technical report for the assignment.
Figure 1
VCC
VS
RS
GND
vout
RC
R1
R2
RE
CE
C2
C1
Table of Assessment Criteria and Associated Grading Criteria#p#分页标题#e#
Assessment
Criteria
1. Discussion on theoretical investigation of the small signal characteristics of CE amplifier Circuit
2. Design Calculations
3. Theoretical Testing of the Circuit
4. Write concise report, which includes a appropriate report structure
Weighting:
0.3
0.4
0.2
0.1
Grading
Criteria
0 – 29%
Little evidence of investigation into small signal characteristics of the CE circuit
Little evidence of design calculation performed, or major errors throughout
Little or no test plan of theoretical testing and measurements
Little or no indication of being aware of the requirements for a technical report, with no referencing
30 – 39%
Evidence of attempting investigation into small signal characteristics of the CE circuit but lacking in content and detail
Indicates ability to perform basic calculation but has significant incompleteness or errors
some analysis indicating theoretical testing and measurements
Indicates ability to write a technical report but major shortcomings or incompleteness. With inappropriate referencing
40 – 49%
Very basic attempt investigation into the small signal characteristics of the CE circuit, but lacking in detail.
Demonstration of adequate ability to perform design calculations but there may be significant errors or incompleteness
Some analysis of significance but incomplete theoretical testing and measurements
Structure with at least acceptable record of calculations, theoretical measurements, discussion and conclusions but with significant shortcomings. . With inappropriate referencing
50 – 59%
Reasonable attempt at investigation into the small signal characteristics of the CE circuit. But lacking in sufficient quality of work.
Generally satisfactory,
Demonstration to perform design calculation but there may be some errors/ incompleteness
Some reasonable explanation of key points in theoretical testing and measurements
Some incompleteness/ shortcomings, but adequate in most respects. . With inappropriate referencing.
60 – 69%
Good attempt at investigation into the small signal characteristics of the CE circuit. with sufficient amount of detail and up to a reasonable quality standard with appropriate referencing.
Generally a completed design calculation and without errors, with supporting explanatory text
Generally correct interpretation/ explanation for most points
Generally good; minor improvements possible
Faculty of
Technology, Engineering and the Environment
In-Course Assessment Brief
Undergraduate Programme
Academic Year 2009/2010
Module:
Analogue Electronics UG2
Assessment Title:
Tutorial questions exercise.
Assessment Identifier:
CWK2
School:
Computing, Telecommunications and Networks#p#分页标题#e#
Module Co-ordinator:
Gurvinder Dubb
Assessment Details and Deadlines:
See ECMS My Course on the intranet.
Brief Assessment Details
The following are tutorial questions in place of a analogue circuit design execrise. .
IMPORTANT STATEMENT
Plagiarism: the presentation of the work of another (from whatever source: book, journal, internet etc) as if it were one’s own independent work. This can be anywhere on a continuum ranging from sloppy paraphrasing to verbatim transcription without crediting sources.
You are advised to refer to the Student Handbook on matters of cheating and plagiarism as they relate to coursework, group assignments, class tests and examinations. Both cheating and plagiarism are totally unacceptable and the University maintains a strict policy against them. It is YOUR responsibility to be aware of this policy and to act accordingly.
The University requires that the following statement is included in all module documents.
“You are reminded of the University Disciplinary Procedures which refer to cheating. Except where the assessment of an assignment is group-based, the final piece of work which is submitted must be your own work. Close similarity between assignments is likely to lead to an investigation for cheating. It is not advisable to show your completed work to your colleagues or to share and exchange disks.
You must also ensure that you acknowledge all sources you have used. Work which is discovered to be the result of collusion or plagiarism will be dealt with under the University’s Disciplinary Procedures, and the penalty may involve the loss of academic credits.
If you have any doubts about the extent to which you are allowed to collaborate with your colleagues, or the conventions for acknowledging the source you have used, you should first of all consult module documentation and, if still unclear, your module tutor.”
You will be asked to confirm in writing when handing in any piece of assessed work that it is your own by completing the Coursework Submission & Record Form which should be printed from ECMS My-course on https://mytid.bcu.ac.uk/.
It is the STUDENT’S responsibility to accurately complete the form and comply with its rules and guidance as described in the student handbook for this academic year.
Learning Outcomes to be Assessed:
1. Analyse the properties and characteristics of discrete transistor and integrated amplifiers.
2. Use simulation tools for the DC and AC analysis of active circuits.
3. Design, construct and test an analogue electronic circuit.
Assessment Details:
Refer to attached sheets for further detials and a table of assessment criteria and associated grading criteria.
Assessment Criteria:
1. Demonstrate an understanding of theory.
2. Fully attempt the tutorial questions
3. Show full working out and step-by-step analysis of tutorial question.#p#分页标题#e#
4. Demonstrate neatness of attempted questions.
Undergraduate – BEng Modular Degree program
Analogue Electronics UG2
Referral Assignment 2
TUTORIAL QUESTIONS ON FEEDBACK AND OSCILLATOR CIRCUITS
1. (a) Define a closed loop amplifier.
(b) A negative feedback amplifier is to have a voltage gain of 100. What feedback
fraction is required if the open loop gain is 430?
2. Describe, using circuit diagrams, how a feedback voltage may be derived from the output of an amplifier. Show how the way in which such feedback is derived affects the output resistance of the amplifier.
3. Using suitable diagrams show how negative feedback may be applied to the input terminals of an amplifier. Show the effect each of the methods you describe has on the input resistance of the amplifier.
4. A feedback amplifier is one in which the output signal is sampled and fed back to the input to form an error signal that drives the amplifier. The basic block diagrams of non-inverting and inverting feedback amplifiers are shown in Fig. 1.
(a) An amplifier has an open loop gain of 2 x 105 and an input resistance of 50 kΩ.
when negative feedback is applied in series with the input, the gain is reduced to
5 x 102. Find (i) the feedback fraction β, (ii) input resistance with feedback.
(b) What effect does negative feedback have on the bandwidth of an
amplifier ?
A
b
x
z
+
-
y
5. Describe an amplifier in which the whole of the output signal is fed back in opposition to the input signal. Deduce the gain of this amplifier with feedback and suggest an application for the amplifier.
(a) Describe an operational amplifier with negative feedback and derive an
expression for the voltage gain in terms of the feedback components.
(b) An amplifier with a voltage gain of -20,000 is used in a feedback circuit where
β = 0.02. Calculate the overall gain with feedback. If the gain of the amplifier
dropped to one-half of its inherent value because of a reduction in the supply
voltage, what would the overall circuit gain become?
6. Draw and describe an oscillator using a single transistor stage as an amplifier, with feedback applied by the way of an LC circuit. How could the feedback fraction be adjusted in an oscillator of this sort?
[Hint:- A single stage collector emitter amplifier having a resistive load replaced by an LC tuned circuit is basically referred to as a tuned-collector oscillator]
7. Draw and describe an the operation of a single stage transistor oscillator using C and R elements in its feedback network and discuss any advantages and disadvantages this circuit might have.
8. Describe the need when is zero phase shift in the amplifier section of the oscillator is necessary? Discuss how can a zero phase amplifier be achieved?
9. With the aid of a circuit diagram describe the operation of the Wien Bridge oscillator network. Draw a implementation of Wien Bridge oscillator circuit using both a transistor implementation and operational amplifier implementation. List the advantages of the Wien Bridge oscillator circuit.#p#分页标题#e#
10. A Wien Bridge oscillator network is designed for 20 kHz zero phase shift.
If R1 = R2 = 1KΩ, find C1 and C2.
Table of Assessment Criteria and Associated Grading Criteria
Assessment
Criteria
1. Demonstrate an understanding of theory
2. attempts made on the tutorial questions
3. Show full working out and step-by-step analysis of tutorial question
4. Demonstrate neatness of attempted questions
Weighting:
0.2
0.2
0.5
0.1
Grading
Criteria
0 – 29%
Little evidence given in applying an understanding of the principles and theory relating to transistor theory
Little evidence, or attempt made on the questions
No attempt made in showing any step by step working out
Little or no attempt effort made to produce neat and clear work
30 – 39%
Some evidence given in applying an understanding of the principles and theory relating to transistor theory
Indicates ability but significant incompleteness in attempting the questions
some attempt made in showing any step by step working out
Some attempt effort made to produce neat and clear work
40 – 49%
Sufficient evidence given in applying an understanding of the principles and theory relating to transistor theory
Demonstration of ability but there may be a basic attempt in the questions and some errors
Reasonable attempt made in showing any step by step working out
Reasonable attempt effort made to produce neat and clear work
50 – 59%
Appropriate evidence given in applying an understanding of the principles and theory relating to transistor theory
Generally satisfactory, but there may be some errors/ incompleteness in the questions
Good attempt made in showing any step by step working out
Good attempt effort made to produce neat and clear work
60 – 69%
Significant evidence given in applying an understanding of the principles and theory relating to transistor theory
Generally complete and without errors, with supporting explanatory text in answering the questions
Very good attempt made in showing any step by step working out
Very good attempt effort made to produce neat and clear work
70+%
Demonstrating an excellent understanding of the principles and theory relating to transistor theory
Correct and well laid out with clear integrated explanatory text in answering the questions
Excellent attempt made in showing any step by step working out
Excellent attempt effort made to produce neat and clear work
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