17
Basic Circuit Theory Woo-Young Choi Dept. of Electrical and Electronic Engineering Yonsei University Lecture 1: Introduction
Basic Circuit Theory
Woo-Young Choi
Dept. of Electrical and Electronic EngineeringYonsei University
Lecture 1: Introduction
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
Why study Basic Circuit Theory
Rapid increase in understanding of electricity in 18,19th century
è The most basic course in Electrical/Electronic Engineering
- History of Electrical/Electronic Engineering
Electric battery (Voltaic pile) invented in 1799
Alessandro Volta (1745 – 1827)
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
Rapid increase in understanding of electricity in 18,19th century
- History of Electrical/Electronic Engineering
André-Marie Ampère (1775 – 1827)
DH Jt
¶Ñ´ = +
¶
Ampere’s Law discovered in 1823
Georg Ohm (1789-1854)
Ohm’s Law published in 1827
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
Michael Faraday (1791-1867)
Faraday’s Law discovered in 1831
BEt
¶Ñ´ = -
¶C
Joseph Henry (1797-1878)
Invention of electromachanical relay in 1835
L
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
C L
In this course,
Operational Amplifierè Linear Circuits
(Linearity: Signals and Systems)
(No transistors: Electronic Circuits)
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
è Rapid increase in application of electricity
- History of Electrical/Electronic Engineering
Samuel Morse (1791- 1872)
Patent for transmission of Morse code issued in 1847
è Telegraphy
First transatlantic telegraphy in 1858
è Appearance of Communication Industry
Invention of telephone by Alexander Bell in 1876
Rapid increase in understanding of electricity in 18,19th century
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
- History of Electrical/Electronic Engineering
Invention of Incandescent light bulb By Thomas Edison in 1880
Demands for electricity generation, transmission, and distribution to every house
è Appearance of Electric Power IndustryFirst public power station: The Edison Electric Light Station in 1882
è Rapid increase in application of electricity
Rapid increase in understanding of electricity in 18,19th century
Edison Lamp Company, Edison Machine Works è Edison General Electric Company
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
- Why study Basic Circuit Theory
è Appearance of Electrical Engineering :
Electrical Engineering Option within Physics Dept. at MIT in 1882 (became a new department in 1902)
è In 1892, EE students are roughly 27% of MIT students
A key subject in Electrical Engineering:
- History of Electrical/Electronic Engineering
Rapid increase in understanding of electricity in 18,19th century
Rapid increase in application of electricity è Industries
Electric circuits
Also EE Department in Technical University of Darmstadt founded in 1883
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
A key subject in Electrical Engineering: Electric circuits
World-wide telegraph networks in 1901Electric power grids in US
è Modeling of electrical networks (circuits) and their analysis, design, implementation
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
How about Electronic Engineering?
Need for amplification and processing of electrical signals
Invention of wireless telegraphy
by Guglielmo Marconi in 1894
Public radio broadcast (NYC) in 1910
First TV broadcast in 1928
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
Vacuum tube amplifiers
Fleming Tube in 1904 Triode Vacuum Tube (Audion) in 1906
Lee De Forest (1873-1961)
ENIAC in 1946
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
Invention of transistor in 1947
Shockley, Brattain, Bardeen
Nobel Prize in Physics (1956)
Semiconductor Revolution: Integration and Scaling
è Moore’s Law
~ 8.5 billion transistors
è Electronic Circuits
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
• Circuit Elements
• Kirchhoff Law (KCL, KVL)
• Circuit Analysis Techniques (NVM, MCM, Eq. Circuits)
• Operational amplifier
• Inductor, Capacitor
• First order response (RL, RC circuits)
• 2nd order response (RLC circuits)
• Sinusoidal steady-steady (SSS) response
• Impedance model, Power calculation
• Frequency selective circuits (Filters)
• Bode Plot
• Active filter circuits
- Topics covered in this course
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
● Teaching Staffs
- T.A.'s: Keebong Hyun (현기봉)Room: C531, Tel: 02-2123-7709 Email: [email protected]
- Lecturer: Prof. Woo-Young Choi (최우영) Room: C525, Tel: 02-2123-2874 Email: [email protected], Web: tera.yonsei.ac.kr
● Prerequisites
- Freshman Physics (일반물리)
- Freshman Mathematics, Differential Equations (공학수학3)
Jae Ho Lee (이재호)Room: C531, Tel: 02-2123-7709 Email: [email protected]
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
● Class Style:
- Discussion Session:
- Lecture:
Attendance check replaced by homework handed-in for each lecture before Mon. night
Q&A, homework solutions, additional problems
Blended Learning
Recorded ppt presentations for two lectures a weekUploaded on LearnUs at Thursday 11am (Beginning with Lecture 2)
Tuesday 10:00-10:50 on Zoom (starting next week)
Attendance required
- Post questions on LearnUS Q&A
Be ready to show and explain your homework answers
Secure a place where you can talk and use tablet/mouse
Use your webcam, if possible
(https://yonsei.zoom.us/j/85397536735)
è Active participation required
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
● Textbook:
● Grades
- Mid-term Exam: 30%
● References: Many available on-line
- Final Exam: 30%- Class Participation: 10%
(9-11 am, Apr. 20,, Tue., Open book)
(9-11 am, Jun. 8, Tue., Open book)
- Attendance (Homework hand-in): 30%
Your participation in LearnUs Q&A, Discussion Session will be evaluated
No late hand-in for homework allowed
Electric Circuits by Nilsson and Riedel (11th Edition) è N&RClass Notes: PDF file will be uploaded every Thursday together with recorded lecture materials
- Automatic attendance check by Zoom Discussion SessionIncomplete homework will be counted as late attendance
è 2 late attendance = 1 absence
Basic Circuit Theory (2021/1) W.-Y. Choi
Lecture 1: Introduction
● Zoom Meeting
Informal Zoom meeting with the professor and fellow students will be held on Thu.from 11:00 -11:50 am, starting 3/18. Schedule will be posted.
● Final Letter Grade
A: 30~40% B: 30~40%
Details will be determined based on the overall performance and score distribution
