Purbayan Das is an enthusiastic educator and researcher who has been a lecturer at BRAC University's Department of CSE since January 2023. He graduated in 2021 with a Bachelor of Science in EEE from Bangladesh University of Engineering and Technology, where he is currently pursuing a Master of Science in the same discipline. His passion for electronics prompted him to do research in the field of nanoelectronics, namely nanophotonics. His research interests include nanophotonics, optoelectronics, and neuromorphic computing, as well as their applications in other fields. He loves to be actively engaged in activities linked to problem-solving and research, constantly stretching the limits of his knowledge and abilities. In addition, he is an avid sports fan who used to regularly compete in hall and departmental sports events during his undergraduate studies. As part of a recent CSE Outdoor Team Building and Workshop, he also participated in a friendly football tournament among coworkers, which his team won.

Purbayan has always had a passion for teaching, and he considers himself fortunate to be able to pursue this passion professionally. He is able to pique his audience's interest in pondering unfamiliar ideas and looking at familiar things in novel ways, that make him well suited for teaching. Driven by his enthusiasm for teaching, he has been regularly producing high quality instructional materials for both teachers and students since joining this university, demonstrating his competence, capacity, and commitment to this profession.

He has honed his leadership skills throughout his school, college, and professional life. As the coordinator for the Circuits and Electronics (CSE250) course, he was given the opportunity to modify the course syllabi to better meet the needs of students. He enjoys playing cricket, football, and badminton in his spare time, as well as traveling and watching movies. As a person, he is best described by intuition, compassion, prospectivity, generosity, and idealism.

Journals

Sarker, A., Mitu, S. A., Das, P., & Choudhury, S. M. (2020). Structurally tunable gear-shaped plasmonic sensor. Optics Express, 28(24), 36070–36083. https://doi.org/10.1364/OE.410123

M.Sc. in Electrical and Electronic Engineering (EEE), Bangladesh University of Engineering and Technology, Dhaka, Bangladesh (2021-Present)
B.Sc. in Electrical and Electronic Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh (2016-2021)
H.S.C., Govt. City College, Chittagong, Bangladesh (2015)

S.S.C., Nasirabad Govt. Boys School, Chittagong, Bangladesh (2013)

Consultation Hour

Course General Information

Course Contents

Fundamental electrical concepts and measuring units of electrical charge, voltage, current, resistance, and power; Laws of electricity (Ohm's law, Kirchhoff's Current and Voltage law) and various methods of electrical circuit analysis (Nodal, Mesh); Introduction to basic electrical circuit elements; I-V characteristics; Circuit analysis in Direct current, First-order Transient and Alternating current mode, for various combinations of Resistive, Inductive and Capacitive networks;  Phasor representation of sinusoidal quantities; Circuit theorems for linear circuits (Source Transformation, Superposition, Thevenin, Norton and Maximum Power Transfer); Open loop and closed loop configuration of Operational Amplifiers. 
 

• This course includes compulsory 3-hour laboratory work.

Course Materials and Resources

Theory Materials

• Course Handout
• Lecture Slides

0. Introduction to CSE250

1. Basics of Electricity

2. Series and Parallel Configurations

3. KCL and KVL

4. I-V Characteristics of Linear Circuits

5. Source Transformation

6. Nodal Analysis

7. Mesh Analysis

8. Superposition Principle

9. Thevenin's Theorem and Norton's Theorem

10. Maximum Power Transfer Theorem

11. First Order Transient Circuits

12. AC Fundamentals, AC Circuits, and AC Power Analysis

• Text and Reference Books
  • Fundamentals of Electric Circuits by Charles K. Alexander and Matthew N. O. Sadiku, 6th Edition, 2019, McGraw Hill Education, ISBN 978-9353165505
  • Electric Circuits by James W. Nilsson and Susan A. Riedel, 12th Edition, 2012, Pearson Education India, ISBN 978-933251861
  • Introductory Circuit Analysis by Robert L. Boylestad, 12th Edition, 2013, Pearson College Div, ISBN 978-0136114994
• Practice Problems
  • Basics of Electricity, Series-Parallel, KVL and KCL
  • Nodal Analysis and Mesh Analysis
  • Thevenin's Theorem, Norton's Theorem, and Maximum Power Transfer Theorem
  • Transient Analysis of First Order RL and RC Circuits (To be added shortly)
• Additional Suggested Problems from Textbook
• YouTube Playlist of Recorded Video Lectures (Bangla)

Lab Materials

• Lab Policy
• Lab Sheets
• Necessary Softwares
• Tutorial on LTspice

Nanophotonics, Optical Properties of Materials, Photonic Neuromorphic Computing, Data Science and Machine Learning