This lecture includes basics of AC circuit analysis, such as (1) Alternating-current circuit, (2)Resonance circuit. These
analyses are very important because all of todays electronic handheld devices equipped the wireless systems those are based
on the resonance phaenomena. The course also includes (3) Two-port circuit analysis. This is very useful for debugging the
systems.
In this course, students will also learn the transient phenomena and the distributed constant circuit.
(4) Transient phenomena:
In the electrical circuits, the waveforms of power supply are drastically changed from steady state. The voltage and current of circuit element is also changed by switching. These phenomena are called "transient response". The transient response is closely related to the initial state just before changes. In this subject, the transient response for the circuits consist of R, L, and C will be analyzed by using differential equations.
(5) Distributed constant circuit:
Electric circuits are basically analyzed as lumped constant circuits, although the circuit elements do not have dimensions, but exist as a point in the space. However, the circuit elements such as R, L, and C have to be handled as the distributed constant circuits, in which the circuit elements are spatially distributed, when the frequency of signal is very high and wavelength is shorter than the dimensions of electric circuit. In this subject, voltage and current for the transmission lines such as power lines and communication wires will be analyzed.
In this course, students will also learn the transient phenomena and the distributed constant circuit.
(4) Transient phenomena:
In the electrical circuits, the waveforms of power supply are drastically changed from steady state. The voltage and current of circuit element is also changed by switching. These phenomena are called "transient response". The transient response is closely related to the initial state just before changes. In this subject, the transient response for the circuits consist of R, L, and C will be analyzed by using differential equations.
(5) Distributed constant circuit:
Electric circuits are basically analyzed as lumped constant circuits, although the circuit elements do not have dimensions, but exist as a point in the space. However, the circuit elements such as R, L, and C have to be handled as the distributed constant circuits, in which the circuit elements are spatially distributed, when the frequency of signal is very high and wavelength is shorter than the dimensions of electric circuit. In this subject, voltage and current for the transmission lines such as power lines and communication wires will be analyzed.
The electric circuit is indispensable for research and development of all kind of recent electronic devices. Especially, when
debugging a malfunction system, an anternating-current circuit analysis and two-port analyses lectured in this course are
very useful. Also, the purpose of this class is to acquire analysis methods of transient response for electric circuits consist
of R, L, and C, and to acquire analysis methods of voltage and current for the transmission lines such as power lines and
communication wires.
- Students who acquired the credit can explain LCR series and/or parallel resonance circuits.
- Students who acquired the credit can explain two-port circuit, such as Z-, Y-, F-, H-parameters.
- To understand the concept of transient phenomena for RC or RL series circuit, when direct or active current is supplied.
- To understand the concept of transient phenomena for LC or RLC series circuit, when direct current is supplied, and for RC or RL series circuit, when pulse wave is supplied.
- ･To understand the basic concept of distributed constant circuits and wave.
･To understand the concept of lossless distributed constant circuits, and of voltage and current waves at the boundary point. - ･To understand the concept of steady analysis for the distributed constant circuits.
･To understand the concept of characteristic impedance and boundary condition for the distributed constant circuits. - ･To understand the analyses of open or short circuit for the distributed constant circuits with voltage and current reflections.
･To understand the concept of resonance and standing wave for the transmission lines.
| test | report-submission | report-evaluation | model answer submission | Total. | |
|---|---|---|---|---|---|
| 1. | 10% | 2% | 2% | 4% | 18% |
| 2. | 10% | 3% | 3% | 6% | 22% |
| 3. | 6% | 2% | 2% | 2% | 12% |
| 4. | 6% | 2% | 2% | 2% | 12% |
| 5. | 6% | 2% | 2% | 2% | 12% |
| 6. | 6% | 2% | 2% | 2% | 12% |
| 7. | 6% | 2% | 2% | 2% | 12% |
| Total. | 50% | 15% | 15% | 20% | - |
The grade will be evaluated by ten reports submission for the tasks in the lecture (15%), its evaluation (15%), its model
answer submission (20%), and also, two examination (50%). To acquire a credit, total score more than 60 % is needed. You may
use an electronic calculator during the exam.
60% evaluation criteria: Students can describe the appropriate formulas in the exam.
60% evaluation criteria: Students can describe the appropriate formulas in the exam.
| Class schedule | HW assignments (Including preparation and review of the class.) | Amount of Time Required | |
|---|---|---|---|
| 1. | Alternating-current circuit :LR series/parallel circuit :CR series/parallel circuit |
Prepare for pp. 49 - pp.100 in the textbook. | 190minutes |
| 2. | Resonance circuit :LCR series resonance circuit :LCR parallel resonance circuit |
Prepare for pp. 101 - pp.109 in the textbook. | 190minutes |
| 3. | Thevenin circuit. Norton circuit. |
Prepare for pp. 130 - pp.140 in the textbook. | 190minutes |
| 4. | Two-port circuits : Impedance matrix (Z-parameter). | Prepare for pp. 172 - pp.179 in the textbook. | 190minutes |
| 5. | Two-port circuits : Admittance matrix (Y-parameter). | Prepare for pp. 180 - pp.184 in the textbook. | 190minutes |
| 6. | Overview of the lecture. | Prepare for pp. 49 - pp.184 in the textbook. | 190minutes |
| 7. | Intermediate exam #report coverage: Class schedule 1-6 Weight of Class schedule 1-2: 30 % Weight of Class schedule 3-6: 70 % #Students cannot refer textbook, note ,and etc. #Calculator can be used. |
Prepare for Chap.2, 3, and 5 in the textbook. | 190minutes |
| 8. | Transient phenomena of RC and RL circuits | Preparation: Textbook, Chapter 6, pp.218-223 | 190minutes |
| 9. | Transient phenomena of LC and RLC circuits | Preparation: Textbook, Chapter 6, pp.218-223 | 190minutes |
| 10. | Transient phenomena of pulse circuit | Preparation: Textbook, Chapter 6, pp.225-228 | 190minutes |
| 11. | Distributed constant circuits #Lossless distributed constant circuits |
Preparation: Textbook, Chapter 7, pp.230-238 | 190minutes |
| 12. | Steady analysis of distributed constant circuits #Characteristic impedance of distributed constant circuits |
Preparation: Textbook, Chapter 7, pp.240-244 | 190minutes |
| 13. | Distributed constant circuits with voltage and current reflections. #Distributed constant circuits at active current, characteristic impedance #Resonance of transmission lines #Resonance of distributed constant circuits, transmission, and standing wave |
Preparation: Textbook, Chapter 7, pp.246-255 | 190minutes |
| 14. | Term-end exam #report coverage: Class schedule 8-13 Weight of Class schedule 8-10: 50 % Weight of Class schedule 11-13: 50 % #Students cannot refer textbook, note, and etc. #Calcurator can be used. |
Review: Textbook, Chapter 7, especially to solve and understand deeply the examples, drill, and practice problem. | 190minutes |
| Total. | - | - | 2660minutes |
| ways of feedback | specific contents about "Other" |
|---|---|
| Feedback in the class |
(Textbook) "Electric circuits", S. Takada, et. al., Jikkyou Syuppan, ISBN：978-4-407-31316-1. Handouts of presentation slides
for lecture summary may be distributed.
Students are expected to have a solid understanding of fundamental mathematics used in electrical circuit theory, particularly
trigonometry, vectors, complex numbers, and differential equations, as a prerequisite for the course. Therefore, it is advisable
for students to take Electric Circuits 1, 2, 3, and Mathematics for Electrical Analyses 1, 2 before enrolling in this course.
- From 16:50 to 17:00 immediately after the lecture, questions and consultations are accepted in the classroom after the lecture.
- Course that cultivates an ability for utilizing knowledge
| Work experience | Work experience and relevance to the course content if applicable |
|---|---|
| Applicable | Based on the work experience, which is Integrated and electronic circuit development at a motor company, and the knowledge of each respective field of expertise, comprehensive electrical circuits through exercises are taught. |
Last modified : Sat Mar 08 04:26:47 JST 2025