Proceedings ArticleDOI
High-efficiency CMOS rectifier for fully integrated mW wireless power transfer
Meysam Zargham,P. Glenn Gulak +1 more
- pp 2869-2872
TLDR
The rectifier targets fully integrated power harvesting biomedical implant and lab-on-chip applications that use on-chip or mm-sized near-field inductively coupled wireless power transfer receivers and achieves the highest measured efficiency in its class.Abstract:
Design and measurement results are presented for a 0.18 µm CMOS full-wave rectifier architecture with 85.8% measured power efficiency at 40.68 MHz. The rectifier targets fully integrated power harvesting biomedical implant and lab-on-chip applications that use on-chip or mm-sized near-field inductively coupled wireless power transfer receivers. The rectifier uses feedback from the output to lower the voltage drop and increase the power efficiency. The rectifier achieves the highest measured efficiency in its class.read more
Citations
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Journal ArticleDOI
A 40.68-MHz Active Rectifier With Hybrid Adaptive On/Off Delay-Compensation Scheme for Biomedical Implantable Devices
TL;DR: A hybrid delay-compensation scheme is proposed to compensate for the turn-on and turn-off delays in an active rectifier operating at 40.68 MHz for wirelessly powered biomedical implant devices.
Journal ArticleDOI
High-Efficiency CMOS RF-to-DC Rectifier Based on Dynamic Threshold Reduction Technique for Wireless Charging Applications
Manal M. Mohamed,Ghazal A. Fahmy,Adel B. Abdel-Rahman,Ahmed Allam,Adel Barakat,Mohammed Abo-Zahhad,Hongting Jia,Ramesh K. Pokharel +7 more
TL;DR: This paper presents a high-efficiency CMOS rectifier based on an improved dynamic threshold reduction technique (DTR) that reduces the threshold voltage of the main pMOS transistors and increases their sensitivity to the RF input signal.
Journal ArticleDOI
An Integrated Wireless Power Management and Data Telemetry IC for High-Compliance-Voltage Electrical Stimulation Applications
TL;DR: This paper describes a 13.56-MHz wireless power recovery system with bidirectional data link for high-compliance-voltage neural/muscle stimulator and the power management system shows 49% peak power efficiency.
Journal ArticleDOI
Implantable RF telemetry for cardiac monitoring in the murine heart: a tutorial review
TL;DR: This article presents the state of the art review of experimental cardiac monitoring telemetry systems, with strong accent on the systems designed to work with a dual pressure–volume conductance-based catheter sensor.
Proceedings ArticleDOI
A CMOS fully-integrated wireless power receiver for autonomous implanted devices
TL;DR: The main target was to optimize the part of the power transfer efficiency concerning only the receiver side, which optimized the quality factor of the integrated inductor, the impedance matching conditions and the rectifier efficiency.
References
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Journal ArticleDOI
Optimal Frequency for Wireless Power Transmission Into Dispersive Tissue
TL;DR: In this paper, the authors examined the range of frequencies that will optimize the tradeoff between received power and tissue absorption and showed that the optimal frequency is above 1 GHz for small receive coil and typical transmit-receive separations.
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A 950-MHz rectifier circuit for sensor network tags with 10-m distance
TL;DR: In this article, the authors presented a 950-MHz wireless power transmission system and a high-sensitivity rectifier circuit for ubiquitous sensor network tags, which offers a battery-life-free sensor tag by recharging the output power of a base station into a secondary battery implemented with the tag.
Journal ArticleDOI
Maximum Achievable Efficiency in Near-Field Coupled Power-Transfer Systems
Meysam Zargham,P. G. Gulak +1 more
TL;DR: A closed form analytical solution for the optimum load that achieves the maximum possible power efficiency under arbitrary input impedance conditions based on the general two-port parameters of the network is presented.
Journal ArticleDOI
A Passive UHF RF Identification CMOS Tag IC Using Ferroelectric RAM in 0.35- $\mu{\hbox {m}}$ Technology
Hiroyuki Nakamoto,D. Yamazaki,Takashi Yamamoto,H. Kurata,S. Yamada,Kenji Mukaida,T. Ninomiya,T. Ohkawa,Shoichi Masui,Kunihiko Gotoh +9 more
TL;DR: A passive UHF RF identification (RFID) tag IC with embedded 2-KB ferroelectric RAM (FeRAM) for rewritable applications enables a 2.9 times faster read-and-write transaction time over EEPROM-based tag ICs.
Journal ArticleDOI
Integrated Low-Loss CMOS Active Rectifier for Wirelessly Powered Devices
TL;DR: A low-loss CMOS full-wave active rectifier that consists of two dynamically biased and symmetrically matched active diodes each realized by an nMOS switch driven by a 2-ns voltage comparator with reverse-current control is presented.