NeuralWISP: A Wirelessly Powered Neural Interface With 1-m Range

Yeager, D.; Holleman, Jeremy; Prasad, Richa; Smith, Joshua R.; Otis, Brian

doi:10.1109/tbcas.2009.2031628

Cited by 70 publications

(17 citation statements)

References 18 publications

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“…The circuits were first simulated using the Cadence Analog Virtuoso tool suite and then prepared using the standard 45-nm CMOS technology [37]. The circuits were simulated by spectre simulator and excited at square wave supply which has the magnitude of 2 V [38]. The measured results signify that the maximum dc voltage is obtained at 20 MHz.…”

Section: Simulation Details and Resultsmentioning

confidence: 99%

An Innovative Design: MOS Based Full-Wave Centre-Tapped Rectifier

Jain

Akashe

2016

Wireless Pers Commun

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A novel, more competent, low leakage and comparatively high speed full-wave centre-tapped rectifier is introduced with minimum distortion. Proficient and exploratory combinations of PMOS-PMOS or NMOS-NMOS logic are utilized to design full-wave centre-tapped rectifier. The scrupulous PMOS-PMOS logic with augmented stacked NMOS transistor is communal form of two PMOS and one NMOS transistor. The main motive of manipulating these circuits is to maintain the substrate biasing during circuit operation. The substrate biasing refers the exploitation in which substrate and drain/source terminal of a transistor is kept in reverse biasing mode. Due to utilization of modified MOS structure after replacing of diode, efficiency of full-wave centre-tapped rectifier is increased up to 20 % with compare to p-n junction diode based full wave centre-tapped rectifier and leakage power dissipation is reduced up to 57 %. The proposed circuit is designed to utilize the body effect properly to reduce the total leakage power of the circuit. The novelty of proposed circuit is the uniqueness of combination of MOS. Due to this; the proposed circuit has impressive resultant parameter with compare to other circuits and previous results. Proposed MOS based full-wave centre-tapped rectifier is optimized at 45 nm CMOS technology and cadence simulation experimental implementations of the leakage power and efficiency demonstrate better consistency through the proposed circuit.

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Section: Simulation Details and Resultsmentioning

confidence: 99%

An Innovative Design: MOS Based Full-Wave Centre-Tapped Rectifier

Jain

Akashe

2016

Wireless Pers Commun

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“…Then the accelerometer sensor readings from the tags are used to infer the exercise being done and the association between the user and the particular weight(s) being used. [25] presents a wireless neural interface that uses WISPs. It provides the neuroscientists a wireless, battery-free method of monitoring neural signals.…”

Section: Related Workmentioning

confidence: 99%

Monitoring body positions and movements during sleep using WISPs

Hoque

Dickerson

Stankovic

2010

Wireless Health 2010

101

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Sleep monitoring is very important for elderly people as inadequate and irregular sleep are often related to serious diseases such as depression and diabetes. In many cases, it is necessary to monitor the body positions and movements made while sleeping because of their relationships to particular diseases (i.e., sleep apnea and restless legs syndrome). Analyzing movements during sleep also helps in determining sleep quality and irregular sleeping patterns. This paper presents a sleep monitoring system based on the WISP platform -active RFID-based sensors equipped with accelerometers. We show how our system accurately infers fine-grained body positions from accelerometer data collected from the WISPs attached to the bed mattress. Movements and their duration are also detected by the system. We present the results of our empirical study from 10 subjects on three different mattresses in controlled experiments to show the accuracy of our inference algorithms. Finally, we evaluate the accuracy of the movement detection and body position inference for six nights on one subject, and compare these results with two baseline systems: one that uses bed pressure sensors and the other is an iPhone application.

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“…Early research-grade systems describing battery-free sensing first targeted sensing of simple quantities, such as temperature or light intensity [1], or highly targeted phenomena, such as neural signals [2] or specific motions [3]. In recent years, commercial sensing systems based on RFID technology have become available, targeting applications ranging from strain monitoring to pickto-light systems to tire pressure monitoring for aircraft [4], [5].…”

Section: Introductionmentioning

confidence: 99%

“…This simplicity is largely attributable to limited on-board energy storage. Applications requiring a high data rate, such as neural recording [2], have used small data packets that can be computed and sent just before a small on-board capacitor runs out of energy. More complex sensing reduces the effective data rate; commercial products performing sensing of simple quantities have a 1 Hz advertised output data rate and operate up to 1.5 m from an RFID reader [4].…”

Section: Introductionmentioning

confidence: 99%

WISPCam: A battery-free RFID camera

Naderiparizi

Parks

Kapetanovic

et al. 2015

2015 IEEE International Conference on RFID (RFID)

Self Cite

145

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Energy-scavenging devices with general-purpose microcontrollers can support arbitrarily complex sensing tasks in theory, but in practice, energy limitations impose severe constraints on the application space. Richer sensing such as image capture would enable many new applications to take advantage of energy scavenging. Richer sensing faces two key challenges: efficiently retaining the necessary amount of harvested energy, and storing and communicating large units of sensor data. This paper presents the WISPCam, a passive UHF RFID camera tag based on the Wireless Identification and Sensing Platform that overcomes these two challenges to support reliable image capture and transmission while powered by an RFID reader. The WISPCam uses a novel charge-storage scheme designed specifically to match the image sensor's needs. This scheme optimally balances capacitance and leakage to improve the sensitivity and efficiency of the power harvester. The WISPCam also uses a novel data storage and communication scheme to reliably support the transfer of complete images to an RFID reader application. The WISPCam makes battery-free image capture practical for applications such as mechanical gauge reading and surveillance, both demonstrated in this paper, and opens the door to richer sensing applications on battery-free devices.

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NeuralWISP: A Wirelessly Powered Neural Interface With 1-m Range

Cited by 70 publications

References 18 publications

An Innovative Design: MOS Based Full-Wave Centre-Tapped Rectifier

An Innovative Design: MOS Based Full-Wave Centre-Tapped Rectifier

Monitoring body positions and movements during sleep using WISPs

WISPCam: A battery-free RFID camera

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