What is Two Port Network
So in this Artical, we will learn about the Two Port Network. So as its name suggests that two port network is the electrical circuit or the network, which contains the two ports. But to understand it in detail, first of all, we need to understand
What is Port
What is port ? So the port is the pair of terminals, which connects the electrical circuit or the network to the external circuit.
So through this port, any actual network or any independent source can be connected to the existing network, but any two terminals cannot be called as a port.
And for that, they need to satisfy port condition if the current I, and to the one terminal of the port and the same current should lead to the second terminal.
So if the pair of terminals satisfy this condition, then they can be called as a port.
so if the electrical circuit or the network contains one such port, then it is called the one port network and all the basic circuit elements like the aesistor capacitor and the data out of the example of the one port network.
Similarly, if the electrical circuit or the network contains to such ports, then it is called the two port network.
And this simple two network is an example of the two port network. So here, this two terminals will act as a one port while this other two terminals will act as a second port.
Similarly, if the network contains more than two ports, then it is called the Multiport network and the directional couplers or the circulators are the example of the Multiport network.
So in this two port network, this port one is often considered as the input port, when the second port is considered as the output port and many times.
When the circuit or the network is represented using this port, then it reduces the complexity during the circuit analysis.
So these two port network model is used in the mathematical circuit analysis techniques for the complex circuits.
So using this two port network model, we can isolate the portion of the larger circuits. So here, basically this two port network is regarded as the black box and the property of this network is specified by some parameters.
So when some input signal is applied to this port, then the response of this network can be easily found using this network parameters.
And in this case, we do not need to find the internal voltage and the current of this network. That means using this two port network model.
We can analyze the complex circuits easily. Apart from that using this two port network model, a similar type of devices or the circuits can be compared easily.
For example, the transistor is often regarded as the two per device for the small signal analysis.
And during the analysis, it is characterized by the network parameters. So in general, any circuit with the two pairs of terminals can be regarded as the two port network provided it does not contain any independent source.
And it also satisfies the poor condition. So the filters, transformers, transmission lines, and the small signal model of the transistor are the few examples that they are treated as the, two port network during the circuit analysis. So in this two port network.
let's say that we'll take at this port. One is equal to V one, but the current, which is flowing through this port one is equal to Ivan.
Similarly, let's say that this port two is equal to V two, and the current is flowing through this port to is equal to I two. So here, basically there are four variables that is V1 V2, N I two.
And for the analysis out of the four variables, the two variables are considered as the independent variables, but the remaining two variables are the dependent variables.
For example, let's see here, Ivan and I two are the independent variables while the V1 and V2 are the dependent variables.
That means this V1 and V2 can be expressed in terms of the independent variables I went in. I to, and based on which variables are the independent variables, the six different models or the six different parameters can be defined for this two port network.
So I hope in this artical, you understood what is two port network and what is the significance of this two port network
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