Department of Computer Science and Engineering (CSE)

BRAC University

Fall 2022

CSE250 – Circuits and Electronics

INTRODUCTION TO CSE250

PURBAYAN DAS, LECTURER (ADJUNCT)

DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING (CSE)
BRAC UNIVERSITY
 Course content
Fundamental electrical concepts and measuring units; Direct current:
voltage, current, resistance and power; Laws of electrical circuits and
methods of network analysis; Circuit theorems; First order transient
circuits; Alternating current: instantaneous and R.M.S. current; voltage
and power, average power for various combinations of R, L and C circuits;
Laws of electrical circuits and methods of network analysis; Circuit
theorems; phasor representation of sinusoidal quantities; Power analysis
of AC circuits; The course includes a compulsory 3 hour (per week)
laboratory work.

[PDS] PURBAYAN DAS CSE250 – CIRCUITS AND ELECTRONICS DEPARTMENT CSE,

OFof
Department CSE,BBRACU
RACU 2
 Course objectives
• To describe basic linear electrical circuit components such as, dependent and independent
voltage and current sources, resistors, capacitors and inductors. I-V characteristics of these
elements.
• To familiarize students with basic electrical parameters such as voltage, current and power and
passive sign convention for computing these parameters.
• To explain basic laws like Ohm’s law, Kirchhoff’s voltage and current law, Thevenin’s and
Norton’s theorem, Maximum power transfer theorem, Superposition theorem as well as
voltage/current divider rule and characteristic equations for capacitors/inductors.
• To introduce several circuit solving methods such as Source transformation, Nodal and Mesh
analysis, method using Superposition theorem, Thevenin/Norton’s equivalent circuit that take
advantage of basic laws.
• To teach how to apply circuit solving techniques to solve steady-state circuits which contain
resistors and dependent sources with direct current.
• To analyse first order transient circuits with resistors, capacitors and inductors in time domain.
• To introduce phasors and analysing circuits containing resistors, capacitors and inductors in
phasor domain with alternating current.
[PDS] PURBAYAN DAS CSE250 – CIRCUITS AND ELECTRONICS DEPARTMENT CSE,
OFof
Department CSE,BBRACU
RACU 3
 Course outcomes
Upon successful completion of this course, students will be able to,

• Describe the behaviour of basic linear electrical circuit components.

• Identify basic circuit parameters like voltage, current and power.

• Explain basic laws of electricity which are used in circuit problems

• Apply circuit solving techniques that uses electrical laws to evaluate the circuit
parameters of a given circuit.

• Analyse the behaviour of a first order transient circuit.

• Evaluate circuit parameters in phasor domain in an AC circuit.

[PDS] PURBAYAN DAS CSE250 – CIRCUITS AND ELECTRONICS DEPARTMENT CSE,

OFof
Department CSE,BBRACU
RACU 4
 Lesson plan
No Topic Lecture# Defining Mesh/Supermesh. Revisiting Passive Sign Convention.
Basic laws of electrical circuits: Kirchhoff’s voltage law.
Illustrating the motivation behind taking this course. What Statement and application of KVL. Voltage divider rule in series
1 Lecture 1 5 Lecture 5
are the real-life implications of this course materials? circuit. Illustrating the assumption of current direction doesn’t
change the KVL equation. Usefulness of supermesh.
Discuss basic circuit parameters like voltage, current,
energy and power definitions and units. Introducing
passive sign convention, positive-negative Quiz 1
2 voltage/current/power. Discuss different types of circuit Lecture 2 Open circuit, Short circuit I-V characteristics. Idea of circuit
elements (active, passive), different types of sources equivalence. Equivalence with inactive current/voltage sources.
(DC/AC, voltage/current, dependent/independent). Series-parallel equivalent circuit for resistance/voltage
Introducing circuit symbols. source/current source. Ideal/ non-Ideal current/voltage source.
6 Lecture 6
Introducing basic electrical components: resistors, voltage Calculating equivalent resistance of series-parallel circuit. Basic
Source, current Source. I-V characteristics of a circuit element. circuit theorem: Source Transformation theorem. Failure of
Basic laws of electrical circuits: Ohm’s law. Using Ohm’s law to applying in Wheatstone bridge circuit.
3 find power. Discuss various circuit configurations: Series, Lecture 3
Parallel, -Y etc. How to identify them and calculate equivalent
resistance. Open and short circuit Explaining Nodal Analysis technique, using it to solve for current,
7 Lecture 7
voltage, power in a given circuit (multiple examples)

Defining Node/Supernode. Introducing Current Sign Reintroducing dependent sources. Demonstrating Nodal
Convention. Basic laws of electrical circuits: Kirchhoff’s Lecture 4 8 Analysis with dependent sources. Problems with floating voltage Lecture 8
current law. Statement and application of KCL. Current sources, using Supernodes to solve such circuits.
4
divider rule in parallel circuit. Illustrating convention doesn’t Explaining Mesh Analysis technique, using it to solve for current,
change the KCL equation. Usefulness of supernode. 9 Lecture 9
voltage, power in a given circuit (multiple examples).

[PDS] PURBAYAN DAS CSE250 – CIRCUITS AND ELECTRONICS DEPARTMENT CSE,

OFof
Department CSE,BBRACU
RACU 5
 Lesson plan (contd ...2)
Demonstrating Mesh Analysis with dependent sources. Capacitors and Inductors, their component equations. SI unit
10 Problems with common current sources, using Lecture 10 16 for measuring capacitance and inductance. Transient circuits, Lecture 16
Supermeshes to solve such circuits. visualizing and analyzing transient circuits.
Quiz 2 Response of transient circuit: first order (RC/RL) circuit, time
Midterm 17 constant. Analyzing and plotting first order transient circuit Lecture 17
response.
Linear circuit elements. I-V characteristics of linear Lecture 11
11 circuits. Circuit Theorems: Thevenin’s theorem. Complex number review. Alternating current, importance of
18 AC circuit. Visualizing the dynamics of an AC circuit.
Lecture 18
Motivation behind Thevenin’s theorem.
Using Thevenin’s theorem for solving circuits. Condition Lecture 12 Phasor diagram, introducing Impedance. Defining impedance
12 for maximum power transfer. Norton’s theorem, relation 19 for different elements Phasor analysis of an AC circuit. Lecture 19
between Thevenin’s and Norton’s theorem. Instantaneous voltage, current and power.
Using test voltage/current sources while applying Lecture 13 Peak RMS voltage/current, real and reactive power. Applying
13 Thevenin’s and Norton’s theorem. Solving resistance 20 superposition theorem on AC circuits containing sources of Lecture 20
matching problems for maximum power transferring. different frequencies.
Reintroduction to circuit linearity, linearity of voltage, Lecture 14 Quiz 4
current in circuits, non-linearity of power. Circuit
14
theorem: Superposition theorem. Using superposition Final Exam
theorem for solving DC circuits.
Solving circuits using superposition theorem with Lecture 15
15
dependent sources.
Quiz 3

[PDS] PURBAYAN DAS CSE250 – CIRCUITS AND ELECTRONICS DEPARTMENT CSE,

OFof
Department CSE,BBRACU
RACU 6
 Course materials
• Text and reference books
Publicati
Sl. Title Author(s) Edition Publisher ISBN
on Year
Fundamentals of Charles K. Alexander, McGraw Hill 978-
1 2019 6th
Electric Circuits Matthew N. O. Sadiku Education 9353165505
Introductory Pearson 978-
2 Robert L. Boylestad 2013 12th
Circuit Analysis Education India 9332518612

• Other materials (if any)

➢ Lecture slides

[PDS] PURBAYAN DAS CSE250 – CIRCUITS AND ELECTRONICS DEPARTMENT CSE,

OFof
Department CSE,BBRACU
RACU 7
 Mark distribution (*tentative)
Assessment tools Weightage (%) Participation Grade (/10)
Attendance 10 90% or above 10
Assignment 5 80% to below 90% 9
Quiz 15 70% to below 80% 8
Midterm 25 60% to below 70% 7
Final 25 50% to below 60% 6
Lab 20 Below 50% 0
Total 100

[PDS] PURBAYAN DAS CSE250 – CIRCUITS AND ELECTRONICS DEPARTMENT CSE,

OFof
Department CSE,BBRACU
RACU 8
 Thank you for your attention

[PDS] PURBAYAN DAS CSE250 – CIRCUITS AND ELECTRONICS DEPARTMENT CSE,

OFof
Department CSE,BBRACU
RACU 9