Biomedical control systems are inherently non linear and carry normal input signals for smooth functioning of the system. Alteration of the normal actuating signal may not be permitted there. We can modify the performance at desired level by injecting an additional signal at the system input without affecting the normal input signals. This book deals with the development of a novel technique for such modifications. The technique is named as "Signal Correction Technique (SCT)", because desired response for appropriate performance of a system is achieved by the application of correcting signal in addition to the existing one. Some applications of the developed technique are also explored in this book.