This course serves as an introduction to the engineering issues related to implantable bionics for therapeutic electrical stimulation of neural and muscle tissue. It deals primarily with gaining an understanding of the requirements (electrical, mechanical, chemical, etc.) of implantable neurostimulators. During the course, an illustrative example of a medical device (e.g. a cochlear implant) will be designed, and extensive practical tasks will be conducted by small groups of students to reinforce the subject matter presented in the lectures and tutorials. The example will be comprised of a single, or multi-channel neurostimulation circuit, an electrode array, and a package that can protect the circuitry from corrosive biological fluids.