DocumentCode :
3146295
Title :
Low-power non-coherent data and power recovery circuit for implantable biomedical devices
Author :
Wilkerson, Benjamin P. ; Kim, Tae-Ho ; Kang, Jin-Ku
Author_Institution :
Dept. of Electron. Eng., Inha Univ., Incheon, South Korea
fYear :
2011
fDate :
17-18 Nov. 2011
Firstpage :
171
Lastpage :
174
Abstract :
In this paper, we present a low-power non-coherent amplitude shift keying (ASK) and phase shift keying (PSK) demodulators with inductive power self-recovery system, and the data-clock recovery circuit for implantable biomedical devices. Both circuits use different coupling factors k from 0.1 to 0.5 in ASK and 0.5 in PSK for inductive link The recovered power regulator that consists of a beta multiplier reference (BMR) with band-gap uses the bridge rectifier output as an unregulated DC input, and produces from 1.73 to 1.8 V regulated output for the demodulator with 2 MHz carrier. The PSK demodulator uses a new demodulation method that uses signals from two differential comparators with low-pass pre-filtered (LPPF) and high-pass pre-filtered (HPPF) outputs for detecting phase changing edges to recover data and clock signals. The full wave detecting signals are used as differential inputs in LPPF comparator of the ASK demodulator. The results of the demodulators with the self-power supply show up to less than 62 μW and 115 μW power consumption in ASK and PSK at 1 Mbps data transfer rate.
Keywords :
amplitude shift keying; biomedical electronics; demodulators; high-pass filters; low-pass filters; medical signal detection; phase shift keying; prosthetics; rectifiers; ASK demodulator; BMR; DC input; PSK demodulator; beta multiplier reference; bridge rectifier output; clock signals; data-clock recovery circuit; frequency 2 MHz; full wave detecting signals; high-pass prefiltered output; implantable biomedical devices; inductive power self-recovery system; low-pass prefiltered output; low-power non-coherent amplitude shift keying; phase shift keying; power consumption; power recovery circuit; voltage 1.73 V to 1.8 V;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
SoC Design Conference (ISOCC), 2011 International
Conference_Location :
Jeju
Print_ISBN :
978-1-4577-0709-4
Electronic_ISBN :
978-1-4577-0710-0
Type :
conf
DOI :
10.1109/ISOCC.2011.6138674
Filename :
6138674
Link To Document :
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