A complete data and power telemetry system utilizing BPSK and LSK signaling for biomedical implants.

Area of Science:

• Biomedical Engineering
• Wireless Communication Systems
• Implantable Devices

Background:

• Biological implants require reliable power and data communication.
• Existing telemetry systems often face limitations in power efficiency and bidirectional communication.
• Battery-less operation is crucial for long-term implantable devices.

Purpose of the Study:

• To implement a prototype telemetry system for battery-less biological implants.
• To demonstrate wireless power delivery and duplex wireless data communication.
• To develop a low-power, single-chip BPSK demodulator for enhanced power savings.

Main Methods:

• Utilized Binary Phase Shift Keying (BPSK) for external-to-implant data transmission.
• Employed Load Shift Keying (LSK) for implant-to-external data transmission.
• Integrated a novel low-power BPSK demodulator architecture on a single chip.
• Designed a Class-E power amplifier for combined data transmission and wireless power delivery.

Main Results:

• Achieved wireless power delivery through the BPSK data signal.
• Demonstrated a low-power BPSK demodulator (0.1mm², 5mW at 3.3V).
• Proposed a sensitive board-level LSK receiver for reverse data transmission.

Conclusions:

• Successfully implemented a very low-power bidirectional telemetry system for biological implants.
• The system leverages BPSK and LSK signaling for efficient power and data transfer.
• This approach offers significant power savings and improved functionality for implantable devices.