A one-chip solution for wireless capsule endoscopes with a potential wireless power transfer module

Implantable medical devices have witnessed their success in recent years. As one of the most feasible devices, wireless capsule endoscope (WCE) draws more research attention. There are several implementations of WCE concerning multiple complex chips and modules. In this paper, we propose a one-chip solution for wireless capsule endoscope. Relying on a single wireless microcontroller unit (MCU) as well as an image sensor, the one-chip wireless capsule endoscope is beneficial in terms of nimbly and reliably transmitting the video from intestines. Efficient transmission of video is achieved in our extensive vitro experiments. Furthermore, we design a high-efficiency wireless power transmission module based on electro-magnetic coupling, which can be viewed as a potential substitute for traditional button cell batteries. Our experiment shows that the prototype of the wireless power transfer module reaches a satisfactory rate of power transfer at 202kHz and has a great potential for further improvement.