1 mm3-sized optical neural stimulator based on CMOS integrated photovoltaic power receiver

Tokuda, Takashi; Ishizu, Takaaki; Wuthibenjaphonchai, Nattakarn; Haruta, Makito; Noda, Toshihiko; Sasagawa, Kiyotaka; Sawan, Mohamad; Ohta, Jun

doi:10.1063/1.5024243

Cited by 51 publications

(43 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In another work [143], a photovoltaic wireless power transfer system based on CMOS (complementary metal-oxide semiconductor) applicable for tiny (≤1-2 mm) implantable electronic devices is introduced. To integrate the photovoltaic cells, the implant contains a CMOS power receiver chip having surface area of 1.25 × 1.25 mm 2 .…”

Section: Solar-powered Wireless Systemmentioning

confidence: 99%

Biointegrated and Wirelessly Powered Implantable Brain Devices: A Review

Das

Moradi

Heidari

2020

IEEE Trans. Biomed. Circuits Syst.

117

View full text Add to dashboard Cite

Implantable neural interfacing devices have added significantly to neural engineering by introducing the lowfrequency oscillations of small populations of neurons known as local field potential as well as high-frequency action potentials of individual neurons. Regardless of the astounding progression as of late, conventional neural modulating system is still incapable to achieve the desired chronic in vivo implantation. The real constraint emerges from mechanical and physical differences between implants and brain tissue that initiates an inflammatory reaction and glial scar formation that reduces the recording and stimulation quality. Furthermore, traditional strategies consisting of rigid and tethered neural devices cause substantial tissue damage and impede the natural behavior of an animal, thus hindering chronic in vivo measurements. Therefore, enabling fully implantable neural devices requires biocompatibility, wireless power/data capability, biointegration using thin and flexible electronics, and chronic recording properties. This article reviews biocompatibility and design approaches for developing biointegrated and wirelessly powered implantable neural devices in animals aimed at long-term neural interfacing and outlines current challenges toward developing the next generation of implantable neural devices.Index Terms-Biocompatibility, biointegration, implantable neural device, mechanical flexibility, wireless power transfer.

show abstract

Section: Solar-powered Wireless Systemmentioning

confidence: 99%

Biointegrated and Wirelessly Powered Implantable Brain Devices: A Review

Das

Moradi

Heidari

2020

IEEE Trans. Biomed. Circuits Syst.

117

View full text Add to dashboard Cite

show abstract

“…After the first demonstration of a photovoltaic wireless power supply for implanted cardiac pacemaker by Murakawa et al, extensive studies have been carried out on the potential exploitation of PV cells as wireless power solutions for implantable bioelectronics, including neural devices, retinal prosthesis, etc . A modified battery‐less pacemaker (30 × 35 × 6 mm) powered by solar modules (three monocrystalline silicon solar cells connected in series) has been recently demonstrated by Haeberlin et al, as shown in Figure a.…”

Section: Energy Transfer Devices Utilize Sources From the Surroundingmentioning

confidence: 99%

Materials Strategies and Device Architectures of Emerging Power Supply Devices for Implantable Bioelectronics

Huang

Wang

et al. 2019

Small

102

View full text Add to dashboard Cite

Implantable bioelectronics represent an emerging technology that can be integrated into the human body for diagnostic and therapeutic functions. Power supply devices are an essential component of bioelectronics to ensure their robust performance. However, conventional power sources are usually bulky, rigid, and potentially contain hazardous constituent materials. The fact that biological organisms are soft, curvilinear, and have limited accommodation space poses new challenges for power supply systems to minimize the interface mismatch and still offer sufficient power to meet clinical‐grade applications. Here, recent advances in state‐of‐the‐art nonconventional power options for implantable electronics, specifically, miniaturized, flexible, or biodegradable power systems are reviewed. Material strategies and architectural design of a broad array of power devices are discussed, including energy storage systems (batteries and supercapacitors), power devices which harvest sources from the human body (biofuel cells, devices utilizing biopotentials, piezoelectric harvesters, triboelectric devices, and thermoelectric devices), and energy transfer devices which utilize sources in the surrounding environment (ultrasonic energy harvesters, inductive coupling/radiofrequency energy harvesters, and photovoltaic devices). Finally, future challenges and perspectives are given.

show abstract

“…2, the CMOS switch between the capacitor and the load is connected and the electric power is delivered from the capacitor to the target load circuit. (15) and (b) improved (18) circuits of the CMOS voltage detector circuit. At the same time, V 2 = 0 turns on M p5 and activates the additional pathway in the first-stage switch.…”

Section: Basic Design and Circuit Operation Of The Proposed Pv Power mentioning

confidence: 99%

“…At the same time, the target circuit should be sufficiently voltage-tolerant to work with the nonuniform, unstable powering pulse. We design systems with typical voltage ranges larger than 1 V (14,15,18) and the fluctuation of 0.2 V is acceptable for our applications.…”

Section: Adjustability Of Threshold Voltagesmentioning

confidence: 99%

See 1 more Smart Citation

Design Optimization of CMOS Control Circuit for Integrated Photovoltaic Power Transfer

Tokuda¹,

Ishizu²,

Wuthibenjaphonchai³

et al. 2018

Sensors and Materials

Self Cite

View full text Add to dashboard Cite

A CMOS control circuit for an integrated photovoltaic (PV) power transfer/harvesting platform is optimized. The proposed PV power transfer/harvesting platform is based on the concept of charging a small PV current in a capacitor and operating a target circuit intermittently. This architecture is suitable for various types of implantable or Internet of Things (IoT) devices. To realize the integration of PV cells on a CMOS chip, we need to improve the performance of the CMOS control circuit. We refined a self-powered voltage detector circuit in the CMOS control circuit to comply with small-current operation and improved the adjustability of the switching voltages. We describe a strategy and experimentally obtained results of the design optimization.

show abstract

1 mm3-sized optical neural stimulator based on CMOS integrated photovoltaic power receiver

Cited by 51 publications

References 26 publications

Biointegrated and Wirelessly Powered Implantable Brain Devices: A Review

Biointegrated and Wirelessly Powered Implantable Brain Devices: A Review

Materials Strategies and Device Architectures of Emerging Power Supply Devices for Implantable Bioelectronics

Design Optimization of CMOS Control Circuit for Integrated Photovoltaic Power Transfer

Contact Info

Product

Resources

About