This book discusses various aspects of analog circuits and its applications which will be beneficial for readers interested in this subject. Analog design explores innovative circuit topologies, architectures and CAD skills so as to conquer the design troubles emerging from new functions and new production technologies. In this book, a new structural design for a SAR ADC is suggested, so as to get rid of the procedure mismatches and reduce the errors. An analog circuit is one that uses nonstop time voltages and currents. This book is a collection of theories and researches based on analog circuits. It even explains radio frequency IC design, memetic method for passive filters design, among others.