Definition of Z Transform

 

 Introduction

 Physical Meaning

Region of Convergence 

 Poles and Zeros

 

Introduction

Z Transform is a very useful mathematical tool, mainly used to solve difference equations. It converts the difference equations into algebraic form, which are then easy to be solved and then the solution is inversely converted, using Inverse Z Transform, to the form it should initially be. It is the discrete equivalent of the Laplace Transform and a generalization of the Discrete Time Fourier Transform. 

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Difference Equations

 

 

Introduction 

Solving Difference Equations 

Example 1: Solving Difference Equation 

Example 2: Solving Difference Equation

Difference Equations with Unilateral Z Transform 

Example 3: Solving Difference Equation with Initial Conditions 

Example 4: Solving Difference Equation with Initial Conditions 

 

 

Introduction

Difference equations are called the equations of which the present value of the discrete output is function of the present and previous values of the discrete input and the previous values of the discrete output. For example a difference equation is:

Read more: Difference Equations