Title :
A wirelessly-powered electro-acupuncture based on Adaptive Pulse Width Mono-Phase stimulation
Author :
Song, Kiseok ; Lee, Seulki ; Yoo, Hoi-Jun
Author_Institution :
Dept. of Electr. Eng., KAIST, Daejeon, South Korea
fDate :
May 30 2010-June 2 2010
Abstract :
A wirelessly-powered electro-acupuncture (EA) that dynamically adapts to body-impedance variation (BIV), is proposed. The proposed EA consists of a slender needle, a helical antenna (70 turns, 1mm diameter) using conductive yarn (100pm diameter, 6.6Ω2/m), and a 1.56mm2 stimulator chip fabricated in 0.18μm 1P6M CMOS process. A stable supply voltage of 1V is wirelessly generated from 433MHz-ISM band with sensitivity of -16dBm. To deal with BIV in the range of 100KΩ-200kΩ, Adaptive-Pulse-Width (APW) scheme is introduced to maintain constant charge injection of 80nC per stimulation. A pair of EAs forms an EA node, and they operate in Alternate Mono-Phase (AMP) fashion to guarantee the safety by neutralization of the injected charge.
Keywords :
CMOS integrated circuits; bioelectric phenomena; biomedical electronics; charge injection; patient treatment; 1P6M CMOS process; ISM band; adaptive pulse width; adaptive-pulse-width scheme; body-impedance variation; charge injection; charge neutralization; conductive yarn; frequency 433 MHz; helical antenna; monophase stimulation; resistance 100 kohm to 200 kohm; size 0.18 mum; size 1 mm; size 100 pm; slender needle; stimulator chip; voltage 1 V; wirelessly-powered electro-acupuncture; Base stations; Degradation; Helical antennas; MOS devices; Medical treatment; Needles; Safety; Space vector pulse width modulation; Voltage; Yarn;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537221
