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A Distance-Immune Low-Power Inductively-Coupled Bidirectional Data Link

Technology Benefits

Alleviates modulation index change with coils distance variation Variations in patient movement and surgical placements do not disrupt data monitoring in biomedical implants

Technology Application

Biomedical Telemetry  Radio-Frequency Identification  Near Field Communication  Internet of Things

Detailed Technology Description

UCLA researchers have developed a distance-immune bi-directional half-duplex wireless data link for monitoring data in biomedical implants. By employing a novel approach based on a free-running oscillator tuned by coupled resonators, immunity to distance variation (within limits) is achieved while meeting all other requirements. This invention alleviates the modulation index change with coils distance variation. Therefore, variations in patient movement and surgical placements will not disrupt data monitoring in biomedical implants.

Others

Background

Wireless power transfer and data communication in biomedical implants is a new method for continuously monitoring brain/body activities. The biomedical implant relays data to a unit outside the human body (uplink direction) and can receive commands or control information in the reverse direction (downlink direction). The data link should be bidirectional, consume very low power inside the body, have enough bandwidth to transfer recorded data from multiple channels and be insensitive to the distance between the external unit and implant. Although the latter feature has been overlooked, distance is highly prone to change due to patient movements and different surgical placements.

Related Materials

Yousefi, A., Yang, D., Abidi, A.A., and Markovic, D., A distance-immune low-power 4-Mbps inductively-coupled bidirectional data link, 2017 Symposium on VLSI Circuits, 2017.

Additional Technologies by these Inventors

• Saturation-Tolerant Electrophysiological Recording Interface
• Scalable Parameterized VLSI Architecture for Compressive Sensing Sparse Approximation
• A Simple, Area-Efficient Ripple-Rejection Technique for Chopped Bio-Signal Amplifiers
• Autonomous Thermoelectric Energy-Harvesting Platform for Biomedical Sensors
• A High Dynamic-Range Sensing Front-End For Neural Signal Recording Systems
• Load Adaptive, Reconfigurable Active Rectifier for Multiple Input Multple Output (MIMO) Implant Power Management
• Electrode Agnostic, Supply Variant Stimulation Engine For Implantable Neural Stimulation

Tech ID/UC Case

29410/2017-776-0

Related Cases

2017-776-0

*Abstract

UCLA researchers in the Department of Electrical Engineering have developed a distance-immune wireless data link for monitoring data in biomedical implants.

*Principal Investigator

Name: Asad Abidi

Department:

Name: Dejan Markovic

Department:

Name: Alireza Yousefi

Department:

Country/Region

USA