Electronic Devices and Circuits

EE25C05:

Electronic Devices and Circuits

Course Objective:

The course introduces students to the physical principles and operational characteristics of electronic devices such as diodes, BJTs, and FETs. Through laboratory-integrated lectures, students will apply these concepts in designing and analyzing rectifiers, amplifiers, and switching circuits. The course emphasizes problem-solving and hands-on skills needed for analog circuit implementation.

Semiconductor Physics and Diodes: Energy bands, carrier generation and recombination, drift and diffusion currents. PN junction operation, ideal and real diode characteristics. Diode Applications: Rectifiers, clippers, clampers, and voltage regulators.

Bipolar Junction Transistors (BJTS): Structure and modes of operation: Active, Cutoff, Saturation. BJT biasing techniques and stability analysis. Small signal analysis and single-stage amplifier design.

Field Effect Transistors (FETs): JFET and MOSFET structures, characteristics and parameters. FET biasing methods and analog switching applications. Common source amplifier design and multistage configurations.

Frequency Response and Power Amplifiers: Frequency response of amplifiers: low, mid, and high frequency. Decibel gain, Bode plots, gain-bandwidth trade-off.Power amplifiers: Class A, B, AB, C – operation and efficiency.

Feedback Amplifiers and Oscillators: Positive and negative feedback, feedback topologies, gain enhancement. Oscillators – Colpitts, Hartley, Crystal – design and analysis.

Task 1: Semiconductor Energy Band Analysis

• Explain:

o Conduction band

o Valence band

o Forbidden energy gap

• Compare:

o Conductors

o Semiconductors

o Insulators

T2 : Design and analyze:

• Half-wave rectifier

• Full-wave rectifier

• Bridge rectifier

T3: Design:

o Positive clipper

o Negative clipper

o Biased clipper

o Clamper circuits and Observe waveform shaping

T4: Design Zener diode voltage regulator

T5: Calculate stability factor for different biasing methods.

T6 :Design two-stage RC coupled amplifier

T7: Compare Class B and Class AB Amplifiers

o Efficiency

o Distortion

o Power handling

Weightage: Continuous Assessment: 40%, End Semester Examinations: 60%.

Assessment Methodology: Assignments (20%), Solution to application-oriented problems using software (20%), Review of GATE questions (20%), Internal Examinations (40%).

References:

1. Salivahanan, S., & Suresh Kumar, N. (2023). Electronic devices and circuits (5th ed.). McGraw Hill Education.

2. Bell, D. A. (2008). Electronic devices and circuits (5th ed.). Oxford University Press.

3. Mehta, V. K., & Mehta, R. (2020). Principles of electronics (12th ed.). S. Chand Publishing.

4. Boylestad, R. L., & Nashelsky, L. (2012). Electronic devices and circuit theory (11th ed.). Pearson Education.

5. Donal Neamen (2006). Electronic circuits: Analysis and design (3rd ed.). Tata

McGraw-Hill Education.