Developing efficient RF-DC converter using switch-only rectifier for biomedical applications

Abstract

The implanted biomedical devices require very efficient RF-DC rectified signal, which provides the essential DC voltage, delivered to the implanted device. In this paper, a switch-only rectifier based on CMOS switch controlled by a timing control circuit is used to improve the rectified signal. This rectifier is used instead of the conventional rectifiers such as Full-bridge rectifier, voltage doublers and active rectifiers. The switch-only rectifier may be used to improve the possibility of extracting the power from implanted received coil. The simulation shows that the power output by the Switch-only rectifier is exactly twice than that the output obtained by using the voltage doublers and this give the system more efficient.