The book will provide the detail of how to design electronic circuits and systems for implantable medical devices such as neurorecorders and neurostimulators. The book focuses on the electrode aspects, the circuit aspects, signal processing aspects, the wireless communication and power transfer aspects and on system integration. It will present state-of-the-art design of microsystem-based neural implants, from the bio-hardware interface up to the full system. The subject is interdisciplinary as it has to bring biomedicine/physiology, technology, system design and information processing together, and so the authors intend to provide readers with the necessary background in basic biology electrophysiology to conduct multidisciplinary research on neural implants.