EC25C05 Electronic Circuits and Analysis – Semester III – ECE / ElecComp – R-2025

Subject Code & Name: EC25C05 – Electronic Circuits and Analysis

Regulation: R-2025

Semester: III (Third Semester)

Branch: B.E. Electronics and Communication Engineering (ECE) / B.E. Electronics and Computer Engineering (ElecComp)

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

Course Objectives

• Covers diode, BJT, and MOSFET circuits for designing amplifiers, feedback systems, and waveform generators using simulation and application-based problem solving.

Full Unit-wise Syllabus

Unit I – Diode and Filter Circuits

Diode circuits - clipper, clamper, voltage doubler, voltage quadrupler, half-wave rectifier, centre-tapped full-wave rectifier, and bridge rectifier circuits. Power supply design. Regulators – Voltage regulator circuits using Zener diode. Passive filters – analysis of RC, RL, RLC filters.

Unit II – BJT Circuits

Load-line analysis, different biasing techniques of BJT, bias stabilization, and early effect, RC-coupled and transformer-coupled multistage amplifiers, and current mirror circuits.

Unit III – MOSFET Circuits

Biasing by fixing VGS, biasing by fixing VG, and connecting a resistor in the source, Biasing using a drain-to-gate feedback resistor, and biasing using a current source. Analysis and design of common source, common drain, common gate amplifier configurations.

Unit IV – Frequency Response of Amplifiers

Frequency response of amplifiers – Low frequency response of BJT and FET amplifiers, lower cut off frequency - hybrid π equivalent circuit of BJT - high frequency response of BJT amplifiers –upper cut off frequency – transition frequency - Miller effect, high frequency response of FET amplifiers. Wide band amplifiers - Wide banding techniques – CC–CE /CD-CS cascade, cascode amplifier, Darlington pair.

Unit V – Feedback Amplifiers and Waveform Generators

Feedback and stability- negative and positive feedback in amplifiers, analysis of four feedback topologies, loop gain. Oscillators - Barkhausen criterion, effect of feedback on amplifier poles, Bode plots, gain and phase margins; positive feedback and sinusoidal oscillators using BJT - Wein bridge oscillator, RC phase shift oscillator, Hartley and Colpitts oscillators. Multivibrators using BJT – Astable, Monostable, and bistable circuits.

Unit VI – Power Amplifiers and Wideband Techniques

Power amplifiers –Analysis of Class A, B, AB, C, D & S power amplifiers, Conversion efficiency and relative performance, Total Harmonic Distortion (THD), Relationship Between Total Power and THD, Heat sinks.

Activities: Quiz, problem-solving assignments, circuit simulation using SPICE tools.

Course Outcomes (COs)

• CO1: Define and explain diode circuits, BJT and MOSFET circuits, amplifier characteristics, feedback, oscillators and power amplifiers.
• CO2: Apply circuit analysis techniques to design and solve problems involving rectifiers, filters, biasing circuits amplifiers, and oscillators.
• CO3: Analyze frequency response, feedback mechanisms, (3 stability, and performance parameters of electronic circuits using appropriate models and methods.
• CO4: Design and develop analog circuits and adapt to modern , (3 tools and emerging technologies for real world applications.

Assessment Pattern (Quick Note)

• Weightage: Continuous Assessns 60%
• Internal methodology: Assignment (20%), Software activity (20%), Quiz (20%), Internal Examinations (40%)

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