Low-Power CMOS Rectifier Design for RFID Applications

Mandal, Soumyajit; Sarpeshkar, Rahul

doi:10.1109/tcsi.2007.895229

Cited by 244 publications

(110 citation statements)

References 8 publications

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“…Auto-Commutative Rectifier AC power transmitted by the base station is rectified at the sensor nodes by using a self-synchronous topology similar to the one presented in [20], [21], which trades off efficiency for the capability to generate workable dc voltages from ac input amplitudes small enough to limit the transistors' performance by their threshold voltages. A schematic of the auto-commutative rectifier (ACR) used is shown in Figure 9.…”

Section: B Combined Oscillator-pa Transmittermentioning

confidence: 99%

A Scalable, 2.9 mW, 1 Mb/s e-Textiles Body Area Network Transceiver With Remotely-Powered Nodes and Bi-Directional Data Communication

Desai

Yoo²,

Chandrakasan

2014

IEEE J. Solid-State Circuits

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Abstract-This paper presents transceivers and a wireless power delivery system for a Body-Area Network (BAN) that uses an e-textiles-based physical layer (PHY) capable of linking a diverse set of sensor nodes monitoring vital signs on the user's body. A central base station in the network controls power delivery and communication resource allotment for every node using a general-purpose on-chip Node Network Interface (NNI). The architecture of the network ensures fault-tolerance, reconfigurability and ease of use through a dual wireless-wireline topology. The nodes are powered at a peak end-to-end efficiency of 1.2% and can transmit measured data at a peak rate of 1 Mb/s. Modulation schemes for communication in both directions have been chosen and a Medium Access and Control (MAC) protocol has been designed and implemented on chip to reduce complexity at the power-constrained nodes, and move it to the base station. While transferring power to a single node at maximum efficiency, the base station consumes 2.9 mW power and the node recovers 34 µW, of which 14 µW is used to power the network interface circuits while the rest can be used to power signal acquisition circuitry. Fabricated in 0.18 µm CMOS technology, the base station and the NNI occupy 2.95 mm 2 and 1.46 mm 2 area respectively.

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Section: B Combined Oscillator-pa Transmittermentioning

confidence: 99%

A Scalable, 2.9 mW, 1 Mb/s e-Textiles Body Area Network Transceiver With Remotely-Powered Nodes and Bi-Directional Data Communication

Desai

Yoo²,

Chandrakasan

2014

IEEE J. Solid-State Circuits

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“…As the wake-up powers of tag ICs are reaching −18 dBm and below [13][14][15][16], very high realized tag antenna gain is no longer an absolute requirement for achieving one to three meters of read range. Consequently, as one of the issues with small antennas is the difficulty of achieving high radiation efficiency [21], for RFID applications where aggressive tag miniaturization is required, trading-off a portion of the radiation efficiency for size-reduction purposes may be a feasible design approach.…”

Section: Theoretical Background and Tag Performance Considerationsmentioning

confidence: 99%

Compact Metal Mountable Uhf Rfid Tag on a Barium Titanate Based Substrate

Björninen

Babar²,

Ukkonen³

et al. 2012

PIER C

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Abstract-The development of a compact metal mountable RadioFrequency IDentification (RFID) tag antenna on a ceramic substrate based on Barium Titanate is presented. The performance limitations and design trade-offs of metal mountable RFID tag antennas are reviewed and the favorable features of a high-permittivity antenna substrate for the development of antennas for metal mountable RFID tags are discussed. The simulation-based tag antenna design process is outlined and the measured read range of the developed metal mountable tag on conductive platforms of various sizes is presented.

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“…It has been demonstrated that far-field RFID power can reliably create a battery with 6 W of received RF power [3] and that analog-to-digital conversion for relatively slow biomedical signals may be performed for less than 1 W [4], [5]. The bottleneck in power is the EKG amplifier or AFE.…”

Section: Introductionmentioning

confidence: 99%

A Micropower Electrocardiogram Amplifier

Fay

Misra

Sarpeshkar

2009

IEEE Trans. Biomed. Circuits Syst.

Self Cite

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Abstract-We introduce an electrocardiogram (EKG) preamplifier with a power consumption of 2.8 W, 8.1 V rms input-referred noise, and a common-mode rejection ratio of 90 dB. Compared to previously reported work, this amplifier represents a significant reduction in power with little compromise in signal quality. The improvement in performance may be attributed to many optimizations throughout the design including the use of subthreshold transistor operation to improve noise efficiency, gain-setting capacitors versus resistors, half-rail operation wherever possible, optimal power allocations among amplifier blocks, and the sizing of devices to improve matching and reduce noise. We envision that the micropower amplifier can be used as part of a wireless EKG monitoring system powered by rectified radio-frequency energy or other forms of energy harvesting like body vibration and body heat.Index Terms-Common-mode feedback (CMFB), electrocardiograph (ECG), electrocardiogram (EKG), low noise, low power.

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Low-Power CMOS Rectifier Design for RFID Applications

Cited by 244 publications

References 8 publications

A Scalable, 2.9 mW, 1 Mb/s e-Textiles Body Area Network Transceiver With Remotely-Powered Nodes and Bi-Directional Data Communication

A Scalable, 2.9 mW, 1 Mb/s e-Textiles Body Area Network Transceiver With Remotely-Powered Nodes and Bi-Directional Data Communication

Compact Metal Mountable Uhf Rfid Tag on a Barium Titanate Based Substrate

A Micropower Electrocardiogram Amplifier

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