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Circuit theory and Analog Electronics (Fall 2005)

Course code : EKRA3A-U1
ECTS Credits : 20 Status : Compulsory
Revised : 29/08 2005 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. The project is documented by a report and a presentation 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 : The students must hand in a small number of exercises, which must be approved 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.

If a group member several times fails to fulfill 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.

Examination: At the examination each student is allocated 40 minutes. The examination is a group examination but the marking is individual. 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 oral performance and the functionality of the project.

The group presents the project by giving well-prepared presentations - ~20 minutes per student. The group is required to coordinate the presentations in such a way that the major aspects of the project are covered, that the presentations are different and that each individual presentation has a good technical span. After the presentation the supervisors and the external examiner pose questions inspired by the presentations and the report. The questions are a priori individual but may - if found relevant by the supervisors or the external examiner - form the basis of a more general group discussion.

During the evaluation by the supervisors and the external examiner, the project group leaves the room. Afterwards the group is summoned and the individual marks are explained. At the exam there is only short time for these explanations - Therefore the students 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