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Circuit theory and Analog Electronics (Spring 2007)

Course code : EKRA3A-U1
ECTS Credits : 20 Status : Compulsory
Revised : 29/08 2006 Written : 27/07 2004
Placement : 3. semester Hours per week : 16
Length : 1 semester Teaching Language : Danish and English

Objective : To learn some fundamental concepts, theories, components and methods inside the field of analog electronics and mathematical modeling, including analogies between electrical and technical systems. Through project work, to ensure practice and absorption, of as many as possible of the topics mentioned under "Main contents". Through project work, to strengthen general engineering qualifications and procedures: Cooperation, time planning, specification, analysis and design, mathematical modeling, simulation, verification of models, hardware construction, test, documentation.
Principal Content : Concepts and theory: Independent and dependent generators, resistance, capacitance, inductance. Ohms law. Voltage division. Kirchhoff´s current and voltage law. Node- and mesh-equation. Thevenin and Norton equivalent. Power and energy. Complex frequency ("s"): Transfer function, poles, zeroes, frequency response, Bode plot, natural response, time constant, resonant frequency, quality factor. Impedance.

Components and methods: Resistor, capacitor, inductor, operational amplifier. Computer-based math tools. Time- and frequency domain circuit and system simulation. Time- and frequency domain measurements.

Systems: Description of models for technical systems, such as electrical systems and other mixed systems. Analogies. Experimental modeling using frequency characteristics. Solution methods for mathematical models, including Laplace transformation. Simulation and verification of mathematical models.
Teaching method : Class teaching composed of overview lectures mixed with partly PC-based exercises. The class teaching totals ~60% of the scheduled class hours, allocated with 75% in the beginning, 50% in the 10th to the 14th semester week and 0% in the end of the semester. Supervision is given inside the scheduled class hours. From a given project definition the student is encouraged to go through the engineering (partly iterative) process: Specification*, analysis and design, modeling, simulation, verification, design, test and documentation. Assignments and Projects are documented by one or more records of answers or reports and a presentaion at the examination (see "Exam").
*To ensure proper coverage of "main contents", the "specification" will, to some extent, be given in the project definition handed out by the teacher.
Required prequisites : Documented knowledge similar to VKET, DSM1 and DSM2.
Recommended prerequisites : -
Relations : KRA3A is a prerequisite for all the following study modules in the field of analog and power electronics, and TVP4E control theory. ELF3 is followed simultaneously.
Type of examination : Oral examination based on assignments
External examiner : External
Marking : Scale of 13
Remarks : Exam :
Oral examination based on group-made products ( Reports and presentation including demonstration of constructed analog hardware)
Remarks :

The students must carry out a small number of exercises and projects. The reports must be approved to enter for the examination.
In the beginning of the semester the students form their own project groups. The group size should be 3-5 students. Under special circumstances, the teacher may allow smaller group sizes. A supervisor will be assigned to each group. The supervisor follows the group and is in charge as examiner. If more teachers are involved in the course, the groups are divided among the teachers, by the teachers.

Students that have not formed a group, before a deadline set by the teacher, are considered to be inactive in the groupwork and may be refused to enter for the examination.

If a group member several times fails to fulfil agreements made by the group, the group may recommend exclusion. If a student doesn"t contributes to the project-work, the teacher may refuse to enter the student for the examination.

On the same day as the examination, before the examination, the group must together present the exercises and projects, including a demonstration of constructed analog hardware. Each student is allocated 20 minutes for their presentation. The group is required to coordinate the presentations in such a way that the major aspects of the exercises and projects are covered, that the presentations are different and that each individual presentation has a good technical span.

At the presentation the external censor and the supervisor will be the audience. The supervisor takes notes for the examination.

Examination: Each student is allocated 15 minutes (all in all). The examination is individual. The supervisor and the external examiner pose questions inspired by the reports and the presentation. The evaluation is based on a general impression of the level achieved by the student relative to the objective of the course. The evaluation is based on the reports, the presentation and the demonstration ( the functionality of constructed analog hardware).

After the examination students, who wish so, may request (by email) a consultation after the exam, where the exam and the project report can be discussed with the supervisor. At this consultation, students that have not passed the exam, will be guided on how to work purposeful towards passing a new exam. The consultation will normally take place in the beginning of the following semester.
Teaching material : Electric Circuits 7th ed. James W. Nilsson, Susan A Riedel. Prentice-Hall. ISBN 0131292609.

Control Systems Engineering. Norman S. Nise. 4th ed. (or newest edition). Wiley.

Notes

Supplementary literature: Close/Frederick: “Modeling and Analysis of Dynamic Systems”, Wiley&Sons. 3rd edition, August 10, 2001. ISBN 0471394424.
Responsible teacher : Anna Friesel , anfri@dtu.dk
Lars Maack , lmaa@dtu.dk