The exponential advances in microfabrication coupled with our increased understanding of neural diseases enables the design of highly sophisticated, novel devices that benefit patients suffering from neurodegenerative diseases. This book provides a comprehensive treatment of CMOS circuits for neural prostheses and covers the basics of building CMOS electronic devices for stimulation and recording from neural systems. This book starts from the fundamentals of electrical neural stimulation and successively builds toward an implantable electronic device, while addressing the issues involved in designing such a device.