Power Management Analysis of Inductively-Powered Implants with 1X/2X Reconfigurable Rectifier

Extensive power management analysis of an inductive power delivery system for medical implants with a 1X/2X reconfigurable rectifier is conducted to help achieve higher system voltage gain and higher system power transfer efficiency under different loading and coupling conditions. Input capacitance matching due to mode switching is analyzed and a matching compensation scheme is proposed. Analysis results could then be used to guide the design of the inductive power delivery system that employs the reconfigurable rectifier. The 1X/2X reconfigurable rectifier was fabricated using a 0.13 μm CMOS process. Measurement results verify the correctness of the analysis and demonstrate the effectiveness of the matching compensation method.