# Circuit theory and network analysis pdf

A network, in the context of electronics, is a collection of circuit theory and network analysis pdf components. Network analysis is the process of finding the voltages across, and the currents through, every component in the network.

There are many different techniques for calculating these values. However, for the most part, the applied technique assumes that the components of the network are all linear.

The methods described in this article are only applicable to linear network analysis, except where explicitly stated. A device with two or more terminals into which, or out of which, current may flow.

A point at which terminals of more than two components are joined. A conductor with a substantially zero resistance is considered to be a node for the purpose of analysis.

A group of branches within a network joined so as to form a complete loop such that there is no other loop inside it . Two terminals where the current into one is identical to the current out of the other. A circuit is, in this sense, a one-port network and is a trivial case to analyse.

If there is any connection to any other circuits then a non-trivial network has been formed and at least two ports must exist. Often, “circuit” and “network” are used interchangeably, but many analysts reserve “network” to mean an idealised model consisting of ideal components. Most often, an input port and an output port are discussed and the transfer function is described as gain or attenuation.

The usual approach is to express the transfer function as a matrix of parameters. A useful procedure in network analysis is to simplify the network by reducing the number of components. This can be done by replacing the actual components with other notional components that have the same effect. A particular technique might directly reduce the number of components, for instance by combining impedances in series.