NDLI: Integrated variable-output switching converter with dual-loop Δ-Σ modulation for adaptive wireless powering in implantable devices

Content Provider	IEEE Xplore Digital Library
Author	Yikai Wang Chen Zheng Dongsheng Ma
Copyright Year	2009
Description	Author affiliation: Integrated System Design Laboratory (ISDL) The University of Arizona, Tucson, AZ 85721, U.S.A. (Yikai Wang; Chen Zheng; Dongsheng Ma)
Abstract	An integrated switching DC-DC power converter is proposed to implement an adaptive wireless powering scheme in implantable biomedical devices. The proposed dual-loop Δ-Σ modulation, error correction and noise shaping techniques work jointly to improve the transient response, noise suppression and line regulation performances. An observation-based double-sampling (OBDS) sensor and a double-sampling half-clock (DSHC) 1-bit A/D converter are also introduced to further increase the signal processing speed without causing any extra cost. The converter was designed with a standard 130-nm CMOS process. The fully transistor-based HSPICE simulation results demonstrate a 2.8/2.2-μs up/down tracking time to a full-range reference voltage step change. A 7.95-mV/V line regulation is achieved, when the supply voltage varies from 1.1 V to 1.5 V. With a 1.2-V supply, the maximum efficiency of 95.5% is measured at 0.9-V output voltage and 90-mW load power, while the efficiency stays above 80% over the entire 170-mW load power range.
Starting Page	578
Ending Page	583
File Size	1084639
Page Count	6
File Format	PDF
ISBN	9781424446483
ISSN	1553572X
e-ISBN	9781424446506
DOI	10.1109/IECON.2009.5414985
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-11-03
Publisher Place	Portugal
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switching converters Voltage Noise shaping DC-DC power converters Wireless sensor networks Implantable biomedical devices Error correction Transient response Biosensors Biomedical signal processing noise shaping Adaptive wireless powering Δ-Σ modulation DC-DC converter
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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