Title :
A bio-implantable platform for inductive data and power transfer with integrated battery charging
Author :
Sole, Michael ; Sanni, Ayodele ; Vilchesy, Antonio ; Toumazou, Christofer ; Constandinou, Timothy G.
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. London, London, UK
Abstract :
This paper describes a mixed signal subsystem for the inductive transfer of power and data to a fully-implantable medical device. The design includes circuits for the inductive power recovery and energy storage (charging), in addition to data recovery and demodulation. The data link is used to upload (at a data rate of up to 180Kbps) calibration and configuration data to the implanted device and integrates both error detection and correction on the recovered bitstream. The system incorporates an implanted Li-Ion micro-battery with supporting charging hard ware to provide an uninterrupted power supply for autonomous deployment. This is to provide continuous operation without the requirement for an externally worn unit and additionally ensures registry (i.e. patient calibration) settings are maintained. The circuit has been implemented in a commercially available 0.35 μm CMOS technology without requiring high-voltage device options.
Keywords :
CMOS integrated circuits; biomedical equipment; calibration; demodulation; integrated circuit design; mixed analogue-digital integrated circuits; prosthetic power supplies; secondary cells; CMOS technology; autonomous deployment; bioimplantable platform; calibration; charging hardware; data link; data recovery; demodulation; energy storage; error detection; implantable medical device; implanted Li-ion microbattery; inductive data transfer; inductive power recovery; inductive power transfer; integrated battery charging; mixed signal subsystem; patient calibration; size 0.35 mum; uninterrupted power supply; Batteries; CMOS integrated circuits; Coils; Decoding; Demodulation; Pulse width modulation; Voltage control; battery charging; data recovery; implanted device; inductive telemetry; neural prosthesis; power recovery;
Conference_Titel :
Circuits and Systems (ISCAS), 2011 IEEE International Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4244-9473-6
Electronic_ISBN :
0271-4302
DOI :
10.1109/ISCAS.2011.5938138
