EN811 100 Linear Circuit Analysis

Semester 2/2567 (Nov 2024-Mar 2025)

Course description

Basic concepts; Power; Energy; Electrical circuit model; Properties of model components; Kirchhoff's current and voltage laws; nodal and mesh analyses; circuit theorems; first order and second order linear circuits; sinusoidal steady-state analysis by phasor methods; sinusoidal steady-state power calculations.

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Instructor

Tatpong Katanyukul

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Textbook (optional)

Svoboda and Dorf, Introduction to Electric Circuits, Wiley 2014.

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Assessments (tentative)

The weight given to each task is listed below.
• Exams 70%
• Quizzes, exercises, and assignments 30%
  • Quizzes: autolab.en.kku.ac.th
  • Exercises: lca.pondja.com/problem/

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Main materials

• Chapter 1
• Chapter 2
• Chapter 3
• Chapter 4
• Chapter 5

(We skip chapter 6. It will be well covered by analog electronics.)

• Chapter 7
    • Physics vs LCA
• Chapter 8
    • Ansatz/method of undetermined coefficients, phasor, and Euler on RC with sinusoidal source (Mozart)
    • RC (LT Spice asc file; right click and download)
    • RC natural response (asc file)
    • RC sine (asc file)
    • RL (asc file)
    • RL sine (asc file)
• Chapter 9
    • Second-order ODE (full treatment, ipynb file)
    • RLC with constant force (ipynb file)
    • RLC critically damped (asc file)
• Chapter 10
    • Sine wave and sound aux (Mozart)
    • Alternative presentation
    • AC Sweep (asc file)
• Chapter 11
    • Alternative presentation
    • Compute sheet (Mozart), Lt-Spice circuit 1
  

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Lt-Spice examples

• DC operating point analysis
• Dependent sources
• Transient analysis: RC cct
• Transient analysis: RL cct
• Low-pass RC
• Low-pass RL
• Hi-pass RC
• Hi-pass RL
• RLC cct: over-damped
• RLC cct: critically-damped damped
• RLC cct: under-damped
• Instantaneous and average powers
• Power factor and pfc
• Power superposition
• Simple transformer
• Demo: how secondary load affects power consumption
• The thing: the great seal bug
•   • Demo: the thing's natural response (see V(x))
•   • Demo: model receiving antenna as V (see V(x))
•   • Demo: model receiving antenna as coupling inductance (see V(e))
• Demo: simulate DC buck converter
• Demo: simulate DC boost converter

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Additional materials

• Linear algebra: R, py
• Plot graph: R, py
• Differential equation: py, sympy
• Complex number: R, py
• Sound/signal demo: py, ipynb (colab)
• Taylor's series and Euler's formula: ipynb

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PySpice

• PySpice first glimpse (try on colab)
• PySpice with netlist (try on colab)

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Miscellaneous

• COE Wiki
• Curse of Software
• Transmission line simulation (understand impedance matching and signal propagation; on Mozart)
• Inductance coil simulation(Mozart)
• Battery charge/discharge simulation (Courtesy: Weetit Wanalertiak, Teletronics 2024)

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Academic Honesty

You are expected to do your own work to show understanding, skills, and what you have learned. All submitted works (including HOMEWORKS!) should be your own and ACADEMIC DISHONESTY IS NOT ALLOWED.
Academic dishonesty includes:

• Copying answers or codes;
• Copying words, ideas, codes, or other materials from another source without giving credit to the original author;
• Copying from your peers or seniors within the course;
• Employing or letting another person to alter, revise, or edit your work, and then submitting the work as your own;
• Intentionally letting any of your peers to copy your work and submit as one's own;
• Submitting work automatically produced by an emerging tool (e.g., AI) as your work.

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Last updated BE2568, Mar 11th.