Abstract
Simple and Efficient Transcutaneous Inductive Micro-System Device Based on ASK Modulation at 6.78 MHz ISM Band
Highlights
Nowadays, the inductive coupling links are wildly used to power the bio-implantable devices such as implantable micro-system, cochlear implants and retinal implants [1]
The modified amplitude shift keying (ASK) modulator and inductive coupling link driven by efficient Class-E power amplifier with 94,5% efficiency and the coupling link of up to 78,29% of efficiency are introduced to transmit 500 Kbit/s of data with modulation index 12,5%, modulation rate 7,37%
There are three main modulation forms used in power and to transmit data to the biomedical implantable devices inductively such as amplitude shift keying (ASK), frequency shift keying (FSK) and phase shift keying (PSK) [5]
Summary
The inductive coupling links are wildly used to power the bio-implantable devices such as implantable micro-system, cochlear implants and retinal implants [1] These implants consist of two parts, external and internal parts which are separated by biological human tissue [2]. There are many studies in which researchers designed inductive coupling links based on ASK forms for biomedical applications using operated frequency lower than 20 MHz. Gudnason 2000 [7], designed a system with operated frequency 10 MHz, modulation index 10% and modulation rate 2% to transfer data 200 Kb/s of speed. In order to reduce the power consumption, a simple and efficient proposed transcutaneous system with ISM operated frequency 6,78 MHz and new ASKS modulator is used to transfer 500 Kb/s of data with modulation index 12,5% and modulation rate 7,37%. The proposed system is simple and implementation easy and can be used for bio-implantable devices such as cochlear implants, retinal implants and transcutaneous implantable micro-system
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