Short Distance Wireless Communications

Puers, Robert; Thoné, Jef

doi:10.1007/978-1-4419-6597-4_7

Cited by 8 publications

(5 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The transmitter generates an alternating magnetic field at the resonant frequency of the ME antennas used in the device (218 kHz), a relatively low frequency that is able to pass nearly losslessly through biological tissue (33). To our knowledge, this frequency is not in a protected band and is relatively close to the 175-kHz frequency band used in medical devices for years (34). The resonant frequency depends on geometry, which can be precisely tuned with the laser cutting method used (see Materials and Methods).…”

Section: Resultsmentioning

confidence: 97%

Miniature battery-free epidural cortical stimulators

Woods,

Singer,

Alrashdan

et al. 2024

Sci. Adv.

View full text Add to dashboard Cite

Miniaturized neuromodulation systems could improve the safety and reduce the invasiveness of bioelectronic neuromodulation. However, as implantable bioelectronic devices are made smaller, it becomes difficult to store enough power for long-term operation in batteries. Here, we present a battery-free epidural cortical stimulator that is only 9 millimeters in width yet can safely receive enough wireless power using magnetoelectric antennas to deliver 14.5-volt stimulation bursts, which enables it to stimulate cortical activity on-demand through the dura. The device has digitally programmable stimulation output and centimeter-scale alignment tolerances when powered by an external transmitter. We demonstrate that this device has enough power and reliability for real-world operation by showing acute motor cortex activation in human patients and reliable chronic motor cortex activation for 30 days in a porcine model. This platform opens the possibility of simple surgical procedures for precise neuromodulation.

show abstract

Section: Resultsmentioning

confidence: 97%

Miniature battery-free epidural cortical stimulators

Woods,

Singer,

Alrashdan

et al. 2024

Sci. Adv.

View full text Add to dashboard Cite

show abstract

“…With the proposed system layout of placing the implant side of the wireless module just beneath the skin, the distance from beneath the skin to above the skin is below 10 mm [ 23 ]. An inductive link is the most suited type of link because of the low attenuation of magnetic fields by the skin tissue and the compactness of the coils [ 16 ]. To keep power consumption low, the carrier frequency is chosen to be below 20 MHz.…”

Section: System Architecturementioning

confidence: 99%

“…Therefore, the requirements of developing the downlink for stimulation include low-power consumption <10 mW, data rates between 200 kbps and 4 Mbps, robustness to interference from the power carrier, and link security. These requirements led to take a low-power system approach which involves using low frequency <100 MHz, an inductive link for communication, phase shift keying (PSK), a nearly digital receiver, and non-coherent demodulation, as introduced in [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Low-Power Wireless Data Transfer System for Stimulation in an Intracortical Visual Prosthesis

Omisakin

Mestrom

Bentum

2021

Sensors

View full text Add to dashboard Cite

There is a growing interest to improve the quality of life of blind people. An implanted intracortical prosthesis could be the last resort in many cases of visual impairment. Technology at this moment is at a stage that implementation is at sight. Making the data communication to and from the implanted electrodes wireless is beneficial to avoid infection and to ease mobility. Here, we focus on the stimulation side, or downlink, for which we propose a low-power non-coherent digital demodulator on the implanted receiver. The experimentally demonstrated downlink is on a scaled-down version at a 1 MHz carrier frequency showing a data rate of 125 kbps. This provides proof of principle for the system with a 12 MHz carrier frequency and a data rate of 4 Mbps, which consumes under 1 mW at the receiver side in integrated circuit (IC) simulation. Due to its digital architecture, the system is easily adjustable to an ISM frequency band with its power consumption scaling linearly with the carrier frequency. The tested system uses off-the-shelf coils, which gave sufficient bandwidth, while staying within safe SAR limits. The digital receiver achieved a reduction in power consumption by skipping clock cycles of redundant bits. The system shows a promising pathway to a low-power wireless-enabled visual prosthesis.

show abstract

“…Similarly to the transmitter design for uplink, the requirements for downlink can be met by taking a system approach aimed at designing a low-power implementation. This involves using low frequency (<100 MHz), an inductive link, phase shift keying (PSK), and a nearly digital receiver with non-coherent demodulation after sampling and by means of edge detection, as introduced in [19,33,34]. The sampling of the received signal makes it possible for a non-coherent demodulation in the BPSK signal by using only edge detection, as described in [35].…”

Section: Non-coherent Bpsk Receivermentioning

confidence: 99%

Sub-Milliwatt Transceiver IC for Transcutaneous Communication of an Intracortical Visual Prosthesis

et al. 2021

View full text Add to dashboard Cite

An intracortical visual prosthesis plays a vital role in partially restoring the faculty of sight in visually impaired people. Reliable high date rate wireless links are needed for transcutaneous communication. Such wireless communication should receive stimulation data (downlink) and send out neural recorded data (uplink). Hence, there is a need for an implanted transceiver that is low-power and delivers sufficient data rate for both uplink and downlink. In this paper, we propose an integrated circuit (IC) solution based on impulse radio ultrawideband using on-off keying modulation (OOK IR-UWB) for the uplink transmitter, and binary phase-shift keying (BPSK) with sampling and digital detection for the downlink receiver. To make the solution low-power, predominantly digital components are used in the presented transceiver test-chip. Current-controlled oscillators and an impulse generator provide tunability and complete the on-chip integration. The transceiver test-IC is fabricated in 180 nm CMOS technology and occupies only 0.0272 mm2. At 1.3 V power supply, only 0.2 mW is consumed for the BPSK receiver and 0.3 mW for the IR-UWB transmitter in the transceiver IC, while delivering 1 Mbps and 50 Mbps, respectively. Our link budget analysis shows that this test chip is suitable for intracortical integration considering the future off-chip antennas/coils transcutaneous 3–7 mm communication with the outer side. Hence, our work will enable realistic wireless links for the intracortical visual prosthesis.

show abstract

Short Distance Wireless Communications

Cited by 8 publications

References 66 publications

Miniature battery-free epidural cortical stimulators

Miniature battery-free epidural cortical stimulators

Low-Power Wireless Data Transfer System for Stimulation in an Intracortical Visual Prosthesis

Sub-Milliwatt Transceiver IC for Transcutaneous Communication of an Intracortical Visual Prosthesis

Contact Info

Product

Resources

About