An electronic circuit is a framework of electronic components like capacitors, resistors, transistors, diodes, etc. that are connected by wires through which an electric current can flow. It can be an analog circuit, a digital circuit or a mixed-signal circuit. Analog circuits are those in which current or voltage varies continuously with time. Some of the basic components of analog circuits are resistors, capacitors, inductors, wires, etc. Analog circuit analysis uses Kirchhoff's circuit laws. In digital circuits, electric signals have discrete values. Transistors are interconnected to create logic gates that provide the functions of Boolean logic. Mixed-signal circuits consist of elements of both analog and digital circuits. Examples are analog-to-digital converters, digital-to-analog converters, etc. Network analysis refers to the process of determining the currents and voltages across every component in a network. Network analysis can be done using the methods of nodal analysis, mesh analysis, superposition and effective medium approximations. This book is a valuable compilation of topics, ranging from the basic to the most complex theories and principles in the field of engineering circuit analysis. Most of the topics introduced herein cover new techniques of circuit analysis and their applications in a comprehensive manner. For all those who are interested in this field, this book can prove to be an essential guide.