Load optimization of an inductive power link for remote powering of biomedical implants

Silay, Kanber Mithat; Dondi, D.; Larcher, Luca; Declercq, M.; Benini, Luca; Leblebici, Yusuf; Dehollain, Catherine

doi:10.1109/iscas.2009.5117803

Cited by 35 publications

(29 citation statements)

References 6 publications

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“…This threshold has been estimated close to 1 MHz [20]. Usually, inductive links for the remote powering of implantable devices operate in a slightly higher frequency range, between 1 MHz and 13.56 MHz, with two dedicated frequencies at 6.78 MHz and 13.56 MHz [10]- [15], [21], [22]. Thus, frequency limitations are a drawback of using litz-wire coils for the remote powering of implantable sensors.…”

Section: Design Techniques For Inductive Linksmentioning

confidence: 99%

A Study of Multi-Layer Spiral Inductors for Remote Powering of Implantable Sensors

Olivo

Carrara

Micheli

2013

IEEE Trans. Biomed. Circuits Syst.

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Abstract-An approach based on multi-layer spiral inductors to remotely power implantable sensors is investigated. As compared to single-layer inductors having the same area, multi-layer printed inductors enable a higher efficiency (up to 35% higher) and voltage gain (almost one order of magnitude higher). A system conceived to be embedded into a skin patch is designed to verify the performance. The system is able to transmit up to 15 mW over a distance of 6 mm and up to 1.17 mW where a 17 mm beef sirloin is placed between the inductors. Furthermore, the system performs downlink communication (up to 100 kbps) and uplink communication based on the backscattering technique (up to 66.6 kbps). Long-range communication is achieved by means of a bluetooth module.Index Terms-Energy harvesting, implantable sensors, inductive link, multi-layer spiral inductors, remote powering.

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Section: Design Techniques For Inductive Linksmentioning

confidence: 99%

A Study of Multi-Layer Spiral Inductors for Remote Powering of Implantable Sensors

Olivo

Carrara

Micheli

2013

IEEE Trans. Biomed. Circuits Syst.

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“…The power consumption of the internal circuits is targeted as 4.5 mW at 3 V supply. The higher carrier frequency, in general, suffers more attenuation in the body tissues [7] but supports the larger bandwidth for the data transfer. However, in typical stimulation system, the stimulus rate for stimulation is usually less than 1 Kbps [8].…”

Section: Circuit Implementation 1 Inductor Designmentioning

confidence: 77%

An Inductively Coupled Power and Data Link with Self-referenced ASK Demodulator and Wide-range LDO for Bio-implantable Devices

Park¹,

Yun²,

Lee³

et al. 2017

JSTS:Journal of Semiconductor Technology and Science

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Abstract-This paper describes a neural stimulation system that employs an inductive coupling link to transfer power and data wirelessly. For the reliable data and power delivery, a self-referenced amplitudeshift keying (ASK) demodulator and a wide-range voltage regulator are suggested and implemented in the proposed stimulator system. The prototype fabricated in 0.35 um BCD process successfully transferred 1.2 Kbps data bi-directionally while supplying 4.5 mW power to internal MCU and stimulation block.Index Terms-Neural stimulator, near-field inductive coupling, maximum power transfer efficiency (PTE), implanted device

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“…The matching network between the inductive link and the rectifier transforms the input impedance of the rectifier at a certain load to the optimum load resistance of the inductive link [12]. This method improves the power efficiency of the overall link around the specified power consumption.…”

Section: Rectifiermentioning

confidence: 99%

“…Table I presents the fixed system parameters used during optimization of the inductive link. The optimal load resistance during optimization is chosen to be 27Ω, considering the compromise between the power efficiency and the susceptibility of the coils to parasitics [12]. The designed coils are fabricated on printed circuit boards.…”

Section: Packagingmentioning

confidence: 99%

Inductive Power Link for a Wireless Cortical Implant With Two-Body Packaging

2011

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Abstract-This article presents an inductive power link for a cortical implant. The link includes a Class-E power amplifier, an inductive link, a matching network, and a rectifier. The coils of the inductive link are designed and optimized for a distance of 10mm (scalp thickness). The power amplifier is designed in order to allow closed loop power control by controlling the supply voltage. A new packaging topology is proposed in order to position the implant in the skull, without occupying much area, but still obtaining short distance between the remote powering coils. The package is fabricated using biocompatible materials such as PDMS and Parylene-C, and it includes the secondary coil, the matching network, and the rectifier. The power efficiency of the link is characterized for a wide range of load power (1-20mW) and found to be 8.1% for nominal load of 10mW. The matching network improves the power efficiency on the whole range, compared to the link without the matching network.

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Load optimization of an inductive power link for remote powering of biomedical implants

Cited by 35 publications

References 6 publications

A Study of Multi-Layer Spiral Inductors for Remote Powering of Implantable Sensors

A Study of Multi-Layer Spiral Inductors for Remote Powering of Implantable Sensors

An Inductively Coupled Power and Data Link with Self-referenced ASK Demodulator and Wide-range LDO for Bio-implantable Devices

Inductive Power Link for a Wireless Cortical Implant With Two-Body Packaging

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