Electrical Engineering ⇒ Topic : Introduction of Two-part Networks

INTRODUCTION

A network is generally represented by a black box. The conductors are connected to the black box and its ends are taken out for access. The ends are called terminals. A network may be two terminal,four-terminal or 2n-terminal. A two-terminal network is called single-port network.Similarly, a four-terminal network is called a two-port network and so on. A two-port network is shown in Figure (a) with black box representation. Input is connected to the terminals 1 and 2 and output is taken from terminals 3 and 4

                                                       Figure (a) Two-port network.

From Figure (a), it is clear that there are four variables V₁, /₁, V₂, and /₂ Out of these four variables, any two variables can be taken as fixed. Therefore, it is possible to express the specified variables in terms of other two variables in a number of ways with the help of parameter. In this chapter, z, y, h, and ABCD or transmission line parameter and image parameter will be discussed.The relationship among the first four will be derived. Before discussing the abovesaid parameters, different kinds of network configurations are discussed at first