The cochlear implant and the retinal prosthesis are the most successful neural implant that have been commercialized. Over 10,000,000 people worldwide (in 2000) are blind because of photoreceptorloss due to degenerative retinal diseases such as retinitis pigmentosa. The cost of the retinal prosthesis, regardless of the costs for surgery and rehabilitation, is approximately $300,000 USD. The cochlear implant was about $25,000 USD (in 2007). Unfortunately, 80% of the world’s impecunious people who live in developing countries, with highly limited healthcare budget and wide spread poverty. These people cannot possibly afford the high cost of currently available implant system. So, it is needed to have a design for low cost but affective cochlear implant and retinal prosthesis. The research trend has been concentrated mostly on improvement of signal processing algorithms. So there is a need in improvement of power transfer circuit of retinal prosthesis and cochlear implant. In contrast to wireless power transmission technique that uses electromagnetic waves and antennas, inductive coupling is based on using loosely coupled coils to transmit power by electromagnetic induction. For the mentioned purpose. The proposed circuit has significant advantage over conventional amplifiers (especially Keywords: Cochlear implant, retinal prosthesis, wireless power transfer for transcutaneous Inductive link, current source driver.
