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Learning Analog Circuits Through Flow, Not Formulas: 6 Steps to Understanding Filters and OP-AMPs [Theory Edition]

The 0s and 1s we talk about, HIGH and LOW, logic gates and flip-flops— they all emerge from the physical event of analog signals crossing a threshold. If so, wouldn't understanding the world before logic— the movements created by current and voltage— be the true beginning of circuit design? This course takes that first step together.

(4.7) 3 reviews

17 learners

Level Beginner

Course period Unlimited

  • tjrgud007264321
Computer Architecture
Computer Architecture
Computer Architecture
Computer Architecture

What you will gain after the course

  • The Physical Meaning of Current and Voltage

  • Basic Understanding of RLC Circuits

  • Understanding the concept of 'signal' through the flow of electric current

  • Understanding transistors as 'regulators' rather than 'gates'

  • How to Read Circuits as 'Language'

Course Introduction

Analog circuits won't make sense if you start by memorizing formulas.
This course starts with 'flow' instead of equations.

Why voltage is generated, why current flows, and how resistors/capacitors handle that flow.
Then, building differential amplification and OP-AMPs on top of that intuition, we'll finally get you to a level where you can "draw" buffer, inverting, and non-inverting amplifiers as well as HPF/LPF filters.

The goal is not 'problem solving', but rather a state where cause-path-result automatically connects in your mind when looking at a circuit.


I recommend this for:

  • I learned circuit theory but can't see the circuits

  • Those for whom voltage/current/R/C/OP-AMP feel disconnected and don't come together

  • Beginners in electronics/electrical engineering/physics/semiconductors, those interested in analog design

  • Those who want to understand the basics (AFE) of amplifying and filtering small signals like sensors/ECG

  • If you get discouraged when "Bode plots/differential equations" appear first (this course doesn't go that route)


What You'll Gain After Taking This Course

  • You can explain voltage/current not through "formulas" but with a physical intuition.

  • You will intuitively understand the meaning of time, buffering, limiting, and storage using R/C.

  • You can view LPF/HPF before and after the waveform and choose "which components to discard."

  • You will develop an intuition for current steering, which is the core of differential amplification.

  • You understand the essence of OP-AMP feedback (V+≈V-), and

    • You can select and design buffer / inverting / non-inverting configurations according to your purpose.

  • Ultimately, you'll be able to draw an AFE chain like Sensor → Buffer → Gain → HPF → LPF on your own.


Course Features

  • Minimal equations: Necessary formulas are used only at a "subtitle" level.


  • Analogy → Landing in Circuit Language: Starts with analogies but ends with circuit design terminology.

  • From Basics to Practical Application: Goes beyond simple concept explanations to cover "when to use what."


Curriculum (Stages 1-6)

  1. Physical Intuition of Current and Voltage: Why do electrons move? Reference point (GND)

  2. Resistors and Capacitors: The fundamental language of circuits that control flow and temporarily store

  3. The Seed of Amplification (Transistor Intuition): How "Control" Leads to Amplification

  4. Differential Amplification & the Essence of OP-AMP: Difference (ΔV) → Distribution (ΔI) → Output (ΔVout)

  5. The Essence of Filters (HPF/LPF): Keeping Only the Desired Signal (Understanding Through Before/After Waveforms)

  6. 3 Practical OP-AMP Configurations: Buffer / Inverting / Non-inverting (Creating Functions with Feedback)


A word before taking the course

When you grasp the intuition before the formulas, your learning speed changes afterward.
This course is the "first map" that builds that intuition.

Recommended for
these people

Who is this course right for?

  • Beginners in Electronics, Physics, and Computer Science

  • A college student who wants to rebuild their foundational knowledge in their major

  • Someone who dreams of becoming an engineer who thinks physically

  • People who prefer hands-on learning

Need to know before starting?

  • Basic Programming Knowledge

  • Intuitive Understanding of Differential Equations

Hello
This is

17

Learners

3

Reviews

4.7

Rating

1

Course

I am Seokhyeong Lee, and I am currently researching semiconductors and analog circuits.

I personally designed a 12-bit SAR ADC and performed LVS/DRC verification and chip fabrication within a Synopsys environment, gaining a deep understanding of the connection between theory and practical circuitry. In this lecture, based on that exp

I personally designed a 12-bit SAR ADC,

I performed LVS/DRC verification and chip fabrication within the Synopsys environment,

I have gained a deep understanding of the connection between theory and actual circuitry.

In this course, based on that experience, we will build a "foundational base for moving from analog through digital to ASIC design" together.

In this lecture, based on that experience,

“Building the fundamental foundation that progresses from analog through digital to ASIC design” together..

Curriculum

All

8 lectures ∙ (1hr 35min)

Course Materials:

Lecture resources
Published: 
Last updated: 

Reviews

All

3 reviews

4.7

3 reviews

  • gimsiwon916643님의 프로필 이미지
    gimsiwon916643

    Reviews 1

    Average Rating 5.0

    5

    100% enrolled

    I'm a junior majoring in Physics. I've always been interested in analog circuits and wanted to pursue a career in that field, so I searched for and took this course. The instructor explained everything from basic analog circuit concepts to OP-AMP operating principles and applications in an easy-to-understand and kind manner, and also showed how to apply them in actual circuits, which was very helpful. I hope this course becomes widely known to people like me who are interested in analog circuits or whose career path is related to this field~

    • tjrgud007264321
      Instructor

      Hello! Thank you so much for taking the time to leave such a thoughtful review. With your physics background, you must have a solid theoretical foundation, and I'm truly proud as an instructor to hear that my 'intuitive approach' helped you understand OP-AMP operating principles and practical applications. While analog circuit design can feel like it has a high barrier to entry, I'm confident that with your perspective of seeing through to the 'physical essence' as you do now, you'll become an excellent engineer. If you encounter any difficulties while studying, please feel free to post questions on the Q&A board anytime. I sincerely support your career path! Fighting!

  • zktchang33님의 프로필 이미지
    zktchang33

    Reviews 17

    Average Rating 4.3

    4

    100% enrolled

    • ijongwon1471069님의 프로필 이미지
      ijongwon1471069

      Reviews 1

      Average Rating 5.0

      Edited

      5

      100% enrolled

      It was a confusing part, but your explanation was so good that I understood it well.

      • tjrgud007264321
        Instructor

        NEKO, thank you for your valuable review! You're right. When studying circuits, the formulas often obscure the real principles, which can be very confusing. 😅 I'm truly happy as an instructor to hear that my explanation helped clear up those frustrating parts for you. I'm rooting for you to design circuits with confidence and no more confusion!

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