A 3 mm × 3 mm Fully Integrated Wireless Power Receiver and Neural Interface System-on-Chip

Kim, Chul; Park, Jiwoong; Ha, Sohmyung; Akinin, Abraham; Kubendran, Rajkumar; Mercier, Patrick P.; Cauwenberghs, Gert

doi:10.1109/tbcas.2019.2943506

Cited by 42 publications

(20 citation statements)

References 25 publications

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“…The second step has been by incorporating most of the discrete components, capacitors and coils, inside the chip. The works reported in [6], [7] and [27] are three examples of such single-chip implants. For such systems, the chip integrity will determine the overall lifetime of the device.…”

Section: Discussionmentioning

confidence: 99%

“…Further scaling of AIMDs, however, has always been limited by the physical constraints of the battery [3], [4]. In this regard, wireless energy transfer techniques using electromagnetic [5], [6], [7], [8], [9] and acoustic energy [10], [11], [12] have been recently proposed as alternative energy delivery solutions that can circumvent the size restriction of the battery and enable the realization of free-floating mm-sized single-chip implants. These mm-sized AIMDs can be instrumental in the expansion of new research fields within biology and medicine, e.g.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Chip Integrity Monitor for Evaluating Moisture/Ion Ingress in mm-Sized Single-Chip Implants

Akgun

Nanbakhsh

Giagka

et al. 2020

IEEE Trans. Biomed. Circuits Syst.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Chip Integrity Monitor for Evaluating Moisture/Ion Ingress in mm-Sized Single-Chip Implants

Akgun

Nanbakhsh

Giagka

et al. 2020

IEEE Trans. Biomed. Circuits Syst.

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“…The 2-coil link is operated using electromagnetic near-field at 144 MHz and is shared for both power transmission and bidirectional data communication. An integrated resonant regulating rectifier IR 3 is implemented to increase energy efficiency [66], [215]. Each of 16 electrodes, which are directly integrated on the chip, can be configured to be either a recording or stimulating channel.…”

Section: System Examples (State Of the Art)mentioning

confidence: 99%

Challenges in Scaling Down of Free-Floating Implantable Neural Interfaces to Millimeter Scale

Yang

2020

IEEE Access

Self Cite

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Implantable neural interface devices are an emerging technology for continuous brain monitoring and brain-computer interface (BCI). Recording of electrical signals from neurons of interest has led to more efficient and personalized diagnosis, treatment, and prognosis of neurological disorders. It facilitates the dynamic mapping of the whole brain, improving our understanding of the links between brain functions and behaviors. Stimulation of targeted nerves and neurons has been utilized as an effective therapy for Parkinson's disease, essential tremor, dystonia, etc. It has also been developed as motor neuroprosthetic devices, improving the quality of life of many. Although initial designs were bulky, recent advances in semiconductor and nano-, micro-technology has enabled the miniaturization of such devices to the millimeter scale. Free-floating neural implants of miniature size are highly scalable to be distributed around the targeted region of interest more extensively. They are more clinically viable as they cause less disturbance to the body and induce less tissue immune response. However, these research efforts for scaling down have faced challenges resulted from decreasing the size of such implants, including issues pertaining to wireless powering, data communication, neural signal recording, and neural stimulation. Through extensive literature research and simulations, the limits and trade-offs regarding neural implant miniaturization are investigated and analyzed for each aspect of the challenges. State-of-the-art development and future trends for advanced neural interfaces are also explored. INDEX TERMS Implantable neural interface, neural signal recording and stimulation, wireless power transfer, millimeter size, free-floating neural probes.

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“…A number of different wireless interface techniques have been applied to implantable medical devices for transmitting power and communicating data, such as ultrasonic [1]- [4], electromagnetic [5]- [14], optical [15]- [17]. A key objective of implementing any scheme for power transmission to an implant is to avoid the need for wires, particularly percutaneous thus reducing the risk of infection.…”

Section: Introductionmentioning

confidence: 99%

Autonomous Wireless System for Robust and Efficient Inductive Power Transmission to Multi-Node Implants

Feng

Constandinou

2021

Preprint

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A number of recent and current efforts in brain machine interfaces are developing millimetre-sized wireless implants that achieve scalability in the number of recording channels by deploying a distributed `swarm' of devices. This trend poses two key challenges for the wireless power transfer: (1) the system as a whole needs to provide sufficient power to all devices regardless of their position and orientation; (2) each device needs to maintain a stable supply voltage autonomously. This work proposes two novel strategies towards addressing these challenges: a scalable resonator array to enhance inductive networks; and a self-regulated power management circuit for use in each independent mm-scale wireless device. The proposed passive 2-tier resonant array is shown to achieve an 11.9% average power transfer efficiency, with ultra-low variability of 1.77% across the network. The self-regulated power management unit then monitors and autonomously adjusts the supply voltage of each device to lie in the range between 1.7V-1.9V, providing both low-voltage and over-voltage protection.

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A 3 mm × 3 mm Fully Integrated Wireless Power Receiver and Neural Interface System-on-Chip

Cited by 42 publications

References 25 publications

A Chip Integrity Monitor for Evaluating Moisture/Ion Ingress in mm-Sized Single-Chip Implants

A Chip Integrity Monitor for Evaluating Moisture/Ion Ingress in mm-Sized Single-Chip Implants

Challenges in Scaling Down of Free-Floating Implantable Neural Interfaces to Millimeter Scale

Autonomous Wireless System for Robust and Efficient Inductive Power Transmission to Multi-Node Implants

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