(SEM III) THEORY EXAMINATION 2022-23 ANALOG ELECTRONICS

This question paper is designed to evaluate a student's understanding of analog electronics, with a strong emphasis on amplifier configurations, feedback mechanisms, oscillator circuits, operational amplifier applications, and multistage electronic systems. The structure of the paper ensures a balanced assessment of conceptual clarity, analytical problem-solving, and the ability to interpret and apply theoretical knowledge to practical circuit diagrams.

The examination begins with Section A, where students are required to demonstrate fundamental understanding through ten short-answer questions. These cover essential definitions such as current amplification, input resistance, multistage amplifiers, feedback principles, operational amplifier configurations, filter circuits, and differential amplifier characteristics. This section tests the foundational knowledge required to approach more advanced problems.

Section B consists of descriptive questions requiring detailed explanations. Students discuss the working principles, circuit diagrams, and applications of various analog components and systems such as transconductance amplifiers, cascode amplifiers, Wien-Bridge oscillators, current mirrors, and summing amplifiers. This section assesses the student’s ability to explain complete circuits, evaluate performance parameters, and understand the purpose of each component within a system.

Section C focuses on analytical and application-based questions, where students must explore specific amplifier configurations or oscillator operations. They may be asked to calculate parameters such as voltage gain in a common-base configuration or explain biasing techniques for FET amplifiers. Additional questions include Class-AB amplifiers, voltage/current-series feedback circuits, sinusoidal and non-sinusoidal oscillator designs, and operational amplifier structures.

The final part of the section tests the understanding of advanced concepts such as differential gain, common-mode gain, CMRR, ICMR, and the design and operation of Schmitt Trigger circuits or filters like Band-Stop networks. These questions require higher-order thinking and the ability to relate theory with real-time electronic applications.

Overall, this examination aims to measure student proficiency in both theoretical and practical aspects of electronics, ensuring they are capable of designing, analyzing, and troubleshooting analog circuits — an essential skill set for electronics and communication engineering.