BM25C04 Electronic Devices and Circuits – Semester III – BME / MedElec – R-2025

Subject Code & Name: BM25C04 – Electronic Devices and Circuits

Regulation: R-2025

Semester: III (Third Semester)

Branch: B.E. Biomedical Engineering (BME) / B.E. Medical Electronics (MedElec)

Credits / L-T-P: 3 Credits | L-T-P: 3-0-0

Course Objectives

• This course aims to provide a solid foundation in the principles, characteristics, and applications of semiconductor devices such as diodes, BJTs, and FETs and design basic electronic circuits for rectification, amplification, and switching purposes, special and power semiconductor devices used in modern electronic and optoelectronic systems.

Full Unit-wise Syllabus

Unit I – Semiconductor Diodes

PN junction diode, Current equations, Energy Band diagram, Diffusion and drift current densities, forward and reverse bias characteristics, Transition and Diffusion Capacitances, Switching Characteristics, Breakdown in PN Junction Diodes, Zener diodes, tunnel diode, LDR, p-i-n diode.

Unit II – Diode Applications

Load Line Analysis, Series Diode Configurations with DC Inputs, Parallel and Series- Parallel Configurations, Half-Wave Rectification. Full-Wave Rectification. Clippers. Clampers. Zener Diodes. Voltage Multiplier Circuits.

Unit III – Bipolar Junction Transistors

NPN and PNP Transistor Operation. Common-Base Configuration. Common-Emitter Configuration. Limits of Operation. DC Biasing-BJTs. Operating Point. Fixed-Bias Circuit. Emitter-Stabilized Bias Circuit. Voltage-Divider Bias. DC Bias with Voltage Feedback. BJT small signal model, high frequency model– Analysis of CE amplifier - Gain and frequency response.

Unit IV – Field Effect Transistors

MOSFETs – Drain and Transfer characteristics, -Current equations -Pinch off voltage and its significance- Threshold voltage -Channel length modulation, D MOSFET, E- MOSFET- Characteristics.

Unit V – Feedback Amplifiers and Oscillators

Basic concepts of feedback -negative feedback, series, Shunt feedback – Positive feedback – Condition for oscillations – RC phase shift – Wien bridge, Hartley, Colpitts and Crystal oscillators, Power amplifiers-Class A and Class B.

Activities: Simulate the analog circuits using EDA tools.

Course Outcomes (COs)

• CO1: Explain the principles, characteristics, and operation of semiconductor diodes and their applications.
• CO2: Analyze and design diode circuits for rectification clipping, clamping, and voltage regulation.
• CO3: Design and analyze the operation and biasing of BJTs and FETs, and analyze their small signal models.
• CO4: Design and analyze amplifier circuits, feedback amplifiers, and oscillators using BJTs and FETs.
• CO5: Design and simulate any analog circuits using EDA.

Assessment Pattern (Quick Note)

• Weightage: Continuous Assessment 40% | End Semester Examinations 60%
• Internal methodology: Solving of GATE questions (30%), Software activity (30), Internal Examinations (40%)

Source: Official Anna University – B.E. Biomedical Engineering R-2025 Curriculum
Last Updated: September 2026