Wireless Bidirectional Neural Transceiver Using Bi-Phasic Quasi-Static Brain Communication

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Researchers at Purdue University have developed a wireless method for bidirectional communication/stimulation and powering for untethered brain-machine interfaces. Current methods for communicating between implants and the brain remain wired, which is limited by transduction loss, leading to information repetitiveness and time inefficiency. Even then, tethered methods struggle with heavy batteries and long wires, which are not sustainable for long-term use. Purdue researchers developed a method that has bi-phasic signaling traversing through brain tissue while remaining untethered. This method eliminates DC (Direct Current) power consumption and maintains ion balance within the tissue, rendering it safe for long-term usage. This technology shows the potential to not only power brain-machine interfaces but also any in-body implant.

Technology Validation: A sub-5mm3 neural node utilized the Bi-Phasic Quasi-Static Brain Communication (BPQ-BC) to demonstrate low channel loss, low always-on power, and high data rates up to 10Mbps. The wireless neural stimulators achieved therapeutic frequencies in mobile rodents.

-Low energy
-Low loss
-High data rates
-Better quality signal

-Neural implants
-Other body implants
Dec 23, 2021
Utility Patent
United States

Dec 23, 2020
United States
Purdue Office of Technology Commercialization
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