Analysis on methods of power transfer for implantable wireless neural recording systems

With the development of the implantable neural recording system, how to power the device has already became an significant problem. Researchers have come up with several methods such as utilizing battery. However, these two early methods both have weakness which limit the further development of the implantable medical device (IMD). Thus, new methods emerge to solve these problems, which serve as ideal substitute for the battery, including the radio frequency (RF) radiation, inductive power transfer (IPT) and acoustic power transfer (APT). This paper mainly focuses on these three methods and discusses their advantages and the disadvantages.