This book will elucidate new techniques and their applications in a multidisciplinary approach. It will discuss the fundamental and modern approaches of analog circuits. As a branch of engineering, analog circuit refers to the signals which vary from zero to full power supply voltage. They are also referred to as linear signals because they provide continuous signal range which is not present in other circuits like digital circuits. This book includes detailed explanations of the various methods and theories related to analog circuits and their designing. It also provides interesting topics for research which readers can take up. The researches presented in this extensive text deal with the core subjects related to this branch. Those interested in this field will find this book full of crucial information. It is a vital tool for all researching and studying this field.