Enabling Wireless Powering and Telemetry for Peripheral Nerve Implants

Jegadeesan, R.; Nag, Sayan; Agarwal, Kush; Thakor, Nitish V.; Guo, Yong‐Xin

doi:10.1109/jbhi.2015.2424985

Cited by 79 publications

(42 citation statements)

References 54 publications

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“…Along with the critical importance of the biocompatibility, mechanical flexibility as well as conformality to the desired tissues forms the foundation of a long-term biointegration [42]. Furthermore, wireless power transfer (WPT) to the neural implant ensures tether-free, highly mobile social connections or recordings in naturalistic situations for the tested animals [15], [17], [18]. In summary, reducing the size and weight is an inevitable engineering prospect [5].…”

Section: Neural Device Interfacesmentioning

confidence: 99%

Biointegrated and Wirelessly Powered Implantable Brain Devices: A Review

Das

Moradi

Heidari

2020

IEEE Trans. Biomed. Circuits Syst.

105

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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.

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Section: Neural Device Interfacesmentioning

confidence: 99%

Biointegrated and Wirelessly Powered Implantable Brain Devices: A Review

Das

Moradi

Heidari

2020

IEEE Trans. Biomed. Circuits Syst.

105

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“…We will be using small size of receiver plate so it will be more convenient to be implanted inside of the body. The overall development of the CPT system prototype is shown in Figure 3 and the specification of the power operated for the biomedical device application to be designed is according to peripheral nerve stimulator implant which only needs 100mWatt of power to operate [12]. The Class E circuit will be supply by 12V DC source and then convert it into AC power.…”

Section: Capacitive Power Transfer Concept In Biomedical Devicementioning

confidence: 99%

The Development of Capacitive Power Transfer for Biomedical Implantable Devices

2019

IJRTE

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Wireless power transfer using electric and magnetic near-fields has been used in many applications widely, and biomedical implants being one of them. The most commonly used method for powering power wirelessly to biomedical implantable device is using inductive coupling between two mutually-coupled coils. In this paper, a consider new method will be proposed in transferring power for biomedical device which is based on capacitive coupling and known as capacitive power transfer (CPT) system. The main reasons of using this method are the low electromagnetic interference (EMI), can reduce power losses and the abilities to transfer power across metal barriers compared to inductive power transfer. To be specific, in this work, we have designed Class E circuit as an inverter to convert the 12VDC to AC with 1 MHz frequency. The prototype of the capacitive power transfer for implantable application has also been successfully developed with capacitive plate dimensions of 3cmx3cm width per length for receiver plate and 4cmx4cm for transmitter plate, respectively. 5mm thickness of beef separation between the plates is used in this paper. The design specification of this work is accordance to stimulator for peripheral nerve implantable device which only needs 100 mW of power to operate in the CPT system. Overall, the developed CPT system for the biomedical device is able to deliver 76mWatt with 41.43% efficiency. To enhance the efficiency, the impedance matching circuit has been proposed in this work and the prototype is now able to deliver 140mWatt power to the DC load, achieving zero voltage switching (ZVS) waveform and efficiency of 77.5%.

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“…Due to obvious advantages in cost, size and efficiency, class-E PA is commonly used in the TX unit of the WPT system [16][17][18][19]. When the conditions of zero-voltage-switching (ZVS) and zero-derivative-switching (ZDS) are both satisfied, the theoretical efficiency of the PA can reach 100% [20].…”

Section: Transmitter Efficiencymentioning

confidence: 99%

Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants

Shao

Líu

Fang

2016

Sci. China Technol. Sci.

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In the wireless power transfer system for freely moving biomedical implants, the receiving unit was generally inefficient for the reason that its design parameters including the receiving coil's dimension and receiving circuits' topology were always determined by experiments. In order to build the relationship between these parameters and the total transfer efficiency, this paper developed a novel efficiency model based on the impedance model of the coil and the circuit model of the receiving circuits. According to the design constraints, the optimal design parameters in the worst case were derived. The results indicate that the combination of the two-layered receiving coil and half-bridge rectifier has more advantages in size, efficiency and safety, which is preferred in the receiving unit. Additionally, when the load resistance increases, the optimal turn number of the receiving coil basically keeps constant and the corresponding transmitting current and total efficiency decrease. For 100 Ω load, the transmitting current and total efficiency in the worst case were measured to be 5.30 A and 1.45% respectively, which are much better than the published results. In general, our work provides an efficient method to determine the design parameters of the wireless power transfer system for freely moving biomedical implants.wireless power transfer system, capsule endoscope, freely moving biomedical implants, receiving coil, coil optimization, efficiency Citation: Shao Q, Liu H, Fang X L. Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants.

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Enabling Wireless Powering and Telemetry for Peripheral Nerve Implants

Cited by 79 publications

References 54 publications

Biointegrated and Wirelessly Powered Implantable Brain Devices: A Review

Biointegrated and Wirelessly Powered Implantable Brain Devices: A Review

The Development of Capacitive Power Transfer for Biomedical Implantable Devices

Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants

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