Towards a chip scale neurostimulator: System architecture of a current-driven 98 channel neurostimulator via a two-wire interface

Jung, Louis H.; Shany, Nitzan; Lehmann, Torsten; Preston, P.; Lovell, Nigel H.; Suaning, Gregg J.

doi:10.1109/iembs.2011.6091662

Cited by 15 publications

(6 citation statements)

References 7 publications

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“…Different methods for delivering dynamic power through an implanted cable have been reported in the literature [6] [7]. The power regulation typically occurs within the PI units, employing either DC/DC converters and/or linear voltage regulators.…”

Section: Intrabody Power Transmissionmentioning

confidence: 99%

Adaptive power regulation and data delivery for multi-module implants

Mifsud

Haci

Ghoreishizadeh

et al. 2017

2017 IEEE Biomedical Circuits and Systems Conference (BioCAS)

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Emerging applications for implantable devices are requiring multi-unit systems with intrabody transmission of power and data through wireline interfaces. This paper proposes a novel method for power delivery within such a configuration that makes use of closed loop dynamic regulation. This is implemented for an implantable application requiring a single master and multiple identical slave devices utilising a parallel-connected 4-wire interface. The power regulation is achieved within the master unit through closed loop monitoring of the current consumption to the wired link. Simultaneous power transfer and full-duplex data communication is achieved by superimposing the power carrier and downlink data over two wires and uplink data over a second pair of wires. Measured results using a fully isolated (AC coupled) 4-wire lead, demonstrate this implementation can transmit up to 120 mW of power at 6 V (at the slave device, after eliminating any losses). The master device has a maximum efficiency of 80 % including a dominant dynamic power loss. A 6 V constant supply at the slave device is recovered 1.5 ms after a step of 22 mA.

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Section: Intrabody Power Transmissionmentioning

confidence: 99%

Adaptive power regulation and data delivery for multi-module implants

Mifsud

Haci

Ghoreishizadeh

et al. 2017

2017 IEEE Biomedical Circuits and Systems Conference (BioCAS)

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“…This leads to our split-system implant solution shown in Fig. 1, where the secondary implant is located close to the stimulation site (for instance the retina in a vision prosthesis) and is connected to the primary implant via a two-wire interface that provide power and data to the secondary implant [13]. The primary implant incorporates a classical transcutaneous power and data link making use of off-chip components.…”

Section: Implant Architecturementioning

confidence: 99%

Low-power circuit structures for chip-scale stimulating implants

Lehmann

Jung

Moghe

et al. 2012

2012 IEEE Asia Pacific Conference on Circuits and Systems

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Implantable electronic circuits are required to operate with low power dissipation due to the difficulties in supplying power transcutaneously and removing heat from the implant site without dangerous temperature elevation. In chip-scale implants, the circuit design is further restricted by the small implant volume and resulting requirement for a fully on-chip circuit implementation. In this paper we present low-power circuit structures for key functions in chip-scale stimulating implants: power transfer circuits, power supply circuits, communications circuits, stimulating circuits, and leakage monitoring circuits.

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“…For that purpose, they used inductive coupling coil technique for delivering power and telemetry where data rate and size were not suitable for implantation. From [7][8][9][10][11][12][13][14][15][16][17][18], a fully integrated retinal stimulator has been implemented. It enables the new techniques for retinal prosthetic device by adopting the mixed-voltage design, empowering the flexible stimulation patterns, and enhancing the stimulation channels.…”

Section: Introductionmentioning

confidence: 99%

A Conceptual Investigation at the Interface between Wireless Power Devices and CMOS Neuron IC for Retinal Image Acquisition

et al. 2020

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In this paper, a conceptual investigation of the interface between wireless power devices and a retina complementary metal oxide semiconductor (CMOS) neuron integrated circuit (IC) have been presented. The proposed investigation consists of three designs: design-I, design-II, and design-III. Design-I involves a slotted loop monopole antenna as per American National Standards Institute (ANSI) guidelines, which achieve an ultra-wide band ranging from 3.1 GHz to 10.6 GHz. The biocompatible antenna is made on silicon-nitride substrate using on-wafer packaging technology and it is used as a receiver device. The performance of antenna provides a wideband, sufficient power to receive, and low losses due to the avoidance of printed circuit board (PCB) fabrication. A CMOS based multi-stack power harvesting circuit achieves the output power ranging from 4 mW to 2.7 W and corresponds from the selected Radio Frequency (RF) bands of loop antenna is exhibited in design-II. The power efficiency of 40% to 82%, with respect to output powers of 4 mW to 2.7 W, is achieved. Design-III includes a CMOS based retina neuron circuit that employs a dynamic feedback technique and support to achieve the number of read-out spikes. At the end of the interface between wireless power devices and a CMOS retina neuron IC, 50 mV read-out spikes are achieved, with varying light intensity, from 0 mW/cm2 to 2 mW/cm2. The proposed design-II and design-III are implemented and fabricated using commercial CMOS 0.065 µm, Samsung process. The antenna and RF power harvesting IC could be placed on a contact lens platform while retina neuron IC can be implanted after ganglions cells inside the eye. The antenna and harvesting IC are physically connected to the retina circuit in the form of light. This conceptual investigation could support medical professionals in achieving an interfacing approach to restore the image visualization.

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Towards a chip scale neurostimulator: System architecture of a current-driven 98 channel neurostimulator via a two-wire interface

Cited by 15 publications

References 7 publications

Adaptive power regulation and data delivery for multi-module implants

Adaptive power regulation and data delivery for multi-module implants

Low-power circuit structures for chip-scale stimulating implants

A Conceptual Investigation at the Interface between Wireless Power Devices and CMOS Neuron IC for Retinal Image Acquisition

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