What is two port network ?Introduction the two port network ?

What is two port network ?

 Introduction the two port network

 A number of impedance are Connected to the system elements and consist the set of elements which are connected in group or set of elements they consist circuits are performed specific function. It is called a network function. Which are the combined of many elements of electrical components like resistance, capacitor or inductor etc.

Network elements

  In a network theory .A network elements components of circuit having different characteristics.

1.       Linear or non linear network  element characteristics

2.      Active or passive network  element characteristics

3.      Unilateral or bilateral network  element characteristics

Linear or non linear network element characteristics- 

The characteristic simply shows with voltage and current. The linear elements show a linear characteristic or linear elements are resistance ,capacitor or inductor  their resistance , capacitance or inductance  are not change with changing apply voltage or current.

A non linear element is the current passing through without changing linearly. When the apply voltage change linearly in the particular frequency. That called a non linear element like semiconductor devices.

Active or passive network element characteristics-

if a circuit element has the ability to increase the energy level and signal pass through the circuit it is called a active element. ex. vacuum tube, semiconductor devices are active elements.

A elements are (resistance ,capacitor or inductor ) passive elements. Because this elements are not boosting the energy level or signal.

Unilateral or bilateral network  element characteristics-

If the magnitude of the current passing through an elements is affected due to change in the polarity of the applied voltage .It may be offer varying impedance with variation in flow of current. Ex diodes ,transistor are unilateral elements.

If a current magnitude remain changed in applied emf s polarity is called a bilateral element. It may be offer varying impedance with variation in flow of irrespective current. Ex resistance ,capacitor or inductor are bilateral element.

Classification of network

1.      Linear circuit network

2.      Non linear circuit network

3.      Active circuit network

4.      Passive circuit network

5.      Unilateral circuit network

6.       Bilateral circuit network

7.      Lumped circuit network

8.      Distributed circuit network

9.      Recurrent or cascaded circuit network and Non recurrent circuit network

Linear circuit network-

It is the circuit whose parameter remain constant change with voltage or current. Ex resistor, capacitor or inductor. A linear circuit obeys Ohm s law current is directly proportional to voltage.

Non linear circuit network -

It is the circuit whose parameter change with voltage or current.Ex semiconductors.non linear circuit not follows Ohm s law.

Active circuit network-

It is network , Which is contain one or more than one source of EMF. An active elements like a battery or transistor.

Passive circuit network-

It is network, Which is not contain any source of EMF is called a passive element. It does not contain any source of energy.

Unilateral circuit network-

When the current direction is changed the circuit properties or characteristic also may be a change is called a Unilateral circuit.

Bilateral circuit network-

When the current direction is changed the circuit properties or characteristic not may be a change is called a Bilateral circuit.This type of element are mostly made of high conductivity.

Lumped circuit network-

Physically separate network elements like resistance, capacitor  and Inductor are known as lumped element.

Distributed circuit network-

A element whose Physically not separate network elements like transmission line are known as Distributed element.

Recurrent or cascaded circuit network and Non recurrent circuit-

When a large circuit consists of similar networks connected one after another , is called a recurrent circuit. A single network is called a non-recurrent circuit.