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Updated: Jun 9, 2025

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

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A Reconfigurable Bidirectional Wireless Power and Full-Duplex Data Transceiver IC for Wearable Biomedical

Junhyuck Lee, Yemin Kim, Dongil Kang

IEEE Transactions on Biomedical Circuits and Systems

|October 22, 2024

Summary

This summary is machine-generated.

This study introduces a reconfigurable bidirectional wireless power and data transceiver (RB-WPDT) for wearables. It enables simultaneous power and data transfer, crucial for advanced biomedical applications.

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Last Updated: Jun 9, 2025

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Area of Science:

Electrical Engineering
Biomedical Engineering
Integrated Circuit Design

Background:

Wearable biomedical devices require efficient wireless power and data transfer for continuous operation and real-time monitoring.
Existing solutions often struggle with simultaneous bidirectional communication and power delivery, limiting functionality.
The need for integrated, reconfigurable transceivers is growing for seamless device interaction.

Purpose of the Study:

To present a novel reconfigurable bidirectional wireless power and data transceiver (RB-WPDT) integrated circuit (IC).
To enable simultaneous, full-duplex (FD) data transmission and power transfer for wearable biomedical applications.
To demonstrate a versatile IC capable of operating as a power amplifier or rectifier.

Main Methods:

Designed a reconfigurable transceiver IC supporting differential class-D power amplifier and full-wave rectifier modes.
Implemented a full-duplex (FD) data transmission scheme using frequency shift-keying pulse-width modulation (FSK-PWM) for downlink and load shift-keying (LSK) for uplink.
Utilized a single inductive link for both power and data transfer, ensuring independent channel operation.

Main Results:

Achieved downlink data rate of 250 kb/s and uplink data rate of 67 kb/s.
Measured an overall DC-to-DC efficiency of 49% and delivered 120 mW to the load at a 5 mm distance.
Fabricated the RB-WPDT IC using a 180-nm BCD CMOS process.

Conclusions:

The proposed RB-WPDT IC successfully integrates reconfigurable power and data transfer capabilities for wearable biomedical systems.
The implemented FD communication scheme achieves simultaneous bidirectional data transmission with minimal interference.
This technology paves the way for more advanced, untethered wearable biomedical devices with enhanced functionality.