NDLI: PLL-Based Contactless Energy Transfer Analog FSK Demodulator Using High-Efficiency Rectifier

Content Provider	IEEE Xplore Digital Library
Author	Yuh-Shyan Hwang Bo-Han Hwang Ho-Cheng Lin Jiann-Jong Chen
Copyright Year	1982
Abstract	This paper proposes a new phase-locked-loop (PLL)-based inductive coupled contactless energy transfer (CET) analog frequency-shift keying (FSK) demodulator using a high-efficiency RF-to-dc rectifier for biomedical implanted devices. The analog FSK demodulator is composed of a modified CMOS three-stage rectifier, a voltage regulator, an FSK signal generator, and a PLL. The proposed modified single-stage rectifier with both positive and negative output voltages using a PMOS and an NMOS pass transistor, an inverter, and two capacitors has a small active area and can enhance the power conversion efficiency. The proposed RF-to-dc rectifier achieves an efficiency of 64% at 8.4 dBm. The power consumption of the demodulator is as low as 0.76 mW, and the active area is 0.084 mm². The analog FSK demodulator supports a data rate of 100 kb/s to 1 Mb/s. The chip was implemented in a Taiwan Semiconductor Manufacturing Company (TSMC) 0.35- μm double-poly quadruple-metal CMOS technology to verify the proposed CET circuit. Two figures of merit are provided to illustrate the advantages of the proposed architecture.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	280
Ending Page	290
Page Count	11
File Size	1937763
File Format	PDF
ISSN	02780046
Volume Number	60
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency shift keying Rectifiers Capacitors Demodulation Transistors Voltage control Inverters rectifier Contactless energy transfer (CET) frequency-shift keying (FSK) demodulator phase-locked loop (PLL) power conversion efficiency
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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