Chapter 4. Circuit Theorems
1
Introduction
In the last chapter, we use nodal and mesh analyses to analyze circuits
with 3 or 4 unknown node voltages or mesh currents
For a circuit with complexity higher than that, these approaches are more
difficult to us

Sinusoids and Phasors
Thus far, our analysis has been limited to dc circuits
We have restricted the forcing function to dc sources for the sake of
simplicity and also for historic reasons
Historically, dc sources were the main means of providing electric

Second-order circuits
In the previous chapter, we consider circuits with a single
storage element (a capacitor or an inductor)
Such circuits are first-order because the differential
equations describing them are first-order
In this chapter, we will consid

Sinusoidal steady-state analysis
In the last chapter, we learned that the Ohms law and Kirchhoffs laws
are applicable to ac circuits
In this chapter, we will see that nodal analysis, mesh analysis, Thevenins
theorem, Nortons theorem, superposition and sou

Chapter 2. Basic Circuit Laws
1
Ohms Law
Ohms law states that the voltage v across a resistor is
directly proportional to the current i flowing through the
resistor
Mathematically, v=iR, unit of R is
The proportional constant R, is called the resistan

First-order circuits: Introduction
In this chapter, we will carry out the analysis of RC or RL circuits by
applying Kirchhoffs Laws
Applying Kirchhoffs Law to pure resistive circuits generates algebraic
equations
Applying Kirchhoffs Law to RC and RL circu

Capacitors and InductorsIntroduction
So far, we have limited our study to resistive circuits
In this chapter, we will learn two other important passive linear circuit
elements: capacitor and inductor
Unlike resistors, capacitors and inductors do not dissi

Operational Amplifiers -Introduction
An op amp can perform a number of mathematical operations (e.g., sum
signals, amplify a signal, integrate it, or differentiate it), thus obtain its name
Internally, an op amp is quite complicated, but externally, an o

Basic concepts
1
Motivation
What is circuit analysis?
To predict how a circuit behave without implementing the circuit
For a simple circuit, thats easy
i=3/30=0.1A
30
3V
How about this?
2
Systems of Units
e.g., 600,000,000mm=600,000m=600km
3
Charge a

Chapter 3. Methods of analysis
1
Introduction
In Chapter 2, we have learned the fundamental laws of circuit
theory (Ohms law and Kirchhoffs laws)
In this chapter, we will apply these laws to develop two
powerful techniques for circuit analysis
Nodal an

Metal-Oxide-Semiconductor
Field-Effect Transistor (MOSFET)
Part 1: Structure, Physical
Characteristic, and Operation
ELEC2306/ELEC3346 Electronic Circuits
MOSFET1: 1
In this chapter, we will:
Study and understand the operation and
characteristics of the v