IC-Based Rectification Circuit Techniques for Biomedical Energy-Harvesting Applications

Abstract

Energy harvesting can be achieved through many different mechanisms. Such technology has been drawing researchers’ attention to its practical applications for a decade, as it can be widely applied to countless scenarios. It steals the show in the modern development of the biomedical electronics, especially implantable applications, as it allows the patients to move freely without restriction. To prolong lifetime of the battery inside/outside a patient’s body, the electrical conversion efficiency of the electronic implant is of primary importance in energy harvesting. The conversion can be achieved by a so-called miniaturized rectification circuit (also known as “rectifier”). This study aims to compare different state-of-the-art techniques focusing on the conversion efficiency of the rectification. Particular emphasis is put on semiconductor-based circuits capable of being integrated with tiny chips on the implants.

Wireless charging for cardiac pacemakers based on class‐D power amplifier and a series–parallel spider‐web coil

“…The performance of the MRC power transfer improved markedly between the primary and secondary coils at intermediate frequencies, that is, 10 kHz–10 MHz 47 . Nevertheless, this range of near‐field electromagnetic frequencies is non‐harmful to the body and is recommended by previously related works 52–54 . Also, utilizing a frequency less than 1 MHz causes excessive heat, especially when close; therefore, the minimum adopted frequency in the present study is greater than 1 MHz.…”

“…47 Nevertheless, this range of near-field electromagnetic frequencies is non-harmful to the body and is recommended by previously related works. [52][53][54] Also, utilizing a frequency less than 1 MHz causes excessive heat, especially when close; therefore, the minimum adopted frequency in the present study is greater than 1 MHz. Moreover, regarding the maximum tested frequency, the adopted development board works at but is not limited to 6.78 MHz at the lowest industrial, scientific, and medical (ISM) band.…”