Norton’s Theorem

Thevenins 11

Introduction In contrast to the Thevenin’s theorem, Norton’s theorem replaces the part of the circuit with an equivalent circuit that constitute a current source and a parallel resistance. This theorem is an extension of the Thevenin’s theorem, proposed by E. L. Norton in 1926. Similar to the Thevenin’s theorem, it…
Continue Reading→

Thevenins Theorem

Thevenin 1

Introduction For many linear circuits, analysis is greatly simplified by the use of two circuit reduction techniques or theorems as Thevenin’s and Norton’s theorems. The thevenin’s theorem is named after a French engineer, M. L. Thevenin’s in 1883 and Norton’s theorem after a scientist E. L. Norton. By using these…
Continue Reading→

Sequential Circuits Basics

Asynchronous sequential cirucits

Introduction Sequential logic circuits are those , whose output depends on both present and previous values of the input signal. But in case of combinational circuits, output depends only on the levels present at input terminals, at any instant of time. These Sequential logic circuits are used to construct finite…
Continue Reading→

Nodal Analysis

Node c

Introduction The main concept behind the nodal analysis is that , in a given circuit if the node voltages are known, then we can immediately determine all branch currents associated with the circuit. As we know that , for finding node voltages we use KCL. In this technique, node voltages…
Continue Reading→

Star Delta Transformations

Star networks

As we have seen in previous articles, for simplifying the circuits we used series and parallel combination of resistors to reduce the circuit complexity. In addition, to these we often use source transformation methods to analyse the circuit. But these techniques are not applicable for all types of networks. Many circuits…
Continue Reading→

Mesh analysis

mesh analysis

In circuit analysis, simple circuits can be analysed by using the basic analysing tools like ohms law, KVL and KCL. But for a complex circuit that consists of various controlled sources, these tools in addition with series and parallel methods are unreliable. Therefore, to find the variables of a branch…
Continue Reading→

Source Transformation

step-7

Source transformation methods are used for circuit simplification to modify the complex circuits by transforming independent current sources into independent voltage sources and vice-versa. To analyse the circuits we can apply a simple voltage and current divider techniques by using these transformations. This source transformation method can also be used…
Continue Reading→

Kirchhoff’s Laws

image

Introduction Many of the electrical circuits are complex in nature and the computations required to find the unknown quantities in such circuits, using simple ohm’s law and series/parallel combination simplifying methods is not possible. Therefore, in order to simplify these circuits Kirchhoff’s laws are used. These laws are the fundamental…
Continue Reading→

Ohm’s Law and Electric Power

Ohms Law for AC circuits

For analysing DC circuits , generally we use different methods such as ohm’s law, network theorems and other circuit simplification tools. A DC circuit analysis is performed mainly to determine the unknown quantities such as voltage, current, resistance and power which are allied with one or more elements of an…
Continue Reading→