Title :
Short-range remote powering for long-term implanted sensor systems in freely moving small animals
Author :
Kilinc, Enver G. ; Maloberti, Franco ; Dehollain, Catherine
Author_Institution :
RF-IC Group, Ecole Polytech. Fed. de Lausanne, Lausanne, Switzerland
Abstract :
The paper presents comparison of different power sources for implantable biomedical systems. It is shown that near field wireless power transfer is a suitable technique for short-range remote powering compared to other options. The required 2.8 mW is received wirelessly via an optimized inductive link driven by an efficient class-E power amplifier at 13.56 MHz from a 3 cm distance with 21% power efficiency including drain efficiency of power amplifier. An integrated rectifier and voltage regulator generate 1.8 V supply voltage from received AC signal. The integrated powering circuits are fabricated in a 0.18 um CMOS technology. The implantable micro-system weighs 1.05 g and the overall size is 12×12×2.3 mm3. Measurement results show the capability of the implantable system in freely moving small animals.
Keywords :
CMOS integrated circuits; bioelectric phenomena; biomedical equipment; body sensor networks; microsensors; power amplifiers; power integrated circuits; rectifiers; voltage regulators; class-E power amplifier; distance 3 cm; drain efficiency; freely moving small animals; frequency 13.56 MHz; implantable biomedical systems; integrated powering circuits; integrated rectifier; long-term implanted sensor systems; near field wireless power transfer; optimized inductive link; power 2.8 mW; power amplifier; power efficiency; power sources; received AC signal; short-range remote powering; size 0.18 mum; voltage 1.8 V; voltage regulator; Animals; Coils; Implants; Monitoring; Sensor systems; Transmitters; Wireless sensor networks;
Conference_Titel :
SENSORS, 2013 IEEE
Conference_Location :
Baltimore, MD
DOI :
10.1109/ICSENS.2013.6688579
