📘 Course Introduction: EEE 2123 – Electronics

Welcome to EEE 2123: Electronics.
This course is designed to build a strong foundation in semiconductor devices and diode-based circuit analysis, which are essential for understanding modern electronic systems.

The mid-term examination pattern reflects both conceptual understanding and analytical problem-solving skills.

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🎯 Course Objectives

By the end of this course, students will be able to:

• Understand semiconductor physics and diode operation

• Analyze I–V characteristics of semiconductor devices

• Apply thermal voltage and temperature effects

• Solve diode circuit problems

• Analyze rectifier and clipping circuits

• Determine breakdown voltage, PIV, and safety conditions

• Sketch and interpret circuit waveforms

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📝 Mid-Term Exam Structure (Based on Question Pattern)

⏱ Duration: 1 Hour 30 Minutes

📊 Total Marks: 30

The exam focuses on four major areas:

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🔹 Question 1: Diode I–V Characteristics & Temperature Effects

Students will:

• Determine thermal voltage (VT)

• Calculate operating temperature

• Find diode current from I–V curve

• Analyze effect of temperature change (e.g., 501K)

• Sketch modified I–V characteristics

📌 Skills Tested:

• Shockley diode equation

• Thermal voltage formula

  VT=kTqV_T = \frac{kT}{q}VT​=qkT​

• Graph interpretation

• Temperature dependence of semiconductor devices

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🔹 Question 2: Diode Circuit Analysis (DC Analysis)

Students must determine:

• Branch currents (I₁, I₂, IGe)

• Node voltages (v₁, v₂)

📌 Skills Tested:

• Ideal vs practical diode model

• KVL and KCL application

• Piecewise linear analysis

• Circuit simplification techniques

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🔹 Question 3: Breakdown & Rectifier Analysis

Students will:

• Find input-output relationship

• Sketch output waveform

• Determine PIV (Peak Inverse Voltage)

• Analyze safety of the circuit

📌 Skills Tested:

• Zener/Breakdown concepts

• Waveform analysis

• Rectifier behavior

• Device protection & safety

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🔹 Question 4: Output Waveform Analysis

Students must:

• Determine output voltage for a given input

• Sketch waveform with proper labeling

📌 Skills Tested:

• Clipping and clamping circuits

• Voltage level shifting

• Graphical representation

• Logical understanding of diode conduction states

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📚 Topics Covered in Mid-Term

• PN Junction Diode

• Silicon vs Germanium Characteristics

• Shockley Equation

• Thermal Voltage & Temperature Effects

• Diode DC Analysis

• Breakdown Voltage

• Peak Inverse Voltage (PIV)

• Rectifiers

• Clippers & Clampers

• Waveform Sketching

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🎓 Teaching Approach

In this course, we focus on:

✔ Conceptual clarity
✔ Mathematical derivation
✔ Graph interpretation
✔ Real-life applications
✔ Problem-solving techniques

Students are encouraged to:

• Practice numerical problems

• Understand graphical analysis

• Focus on temperature effects

• Master waveform drawing

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🧠 What I Expect From Students

• Clear understanding of diode behavior

• Strong fundamentals in circuit laws

• Ability to interpret graphs

• Logical thinking in breakdown analysis

• Neat and labeled waveform sketches