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Published on: July 21, 2015
High data-rate 6.7 GHz wireless ASIC transmitter for neural prostheses
Eric Y Chow1, Adam Kahn, Pedro P Irazoqui
1Brain Computer Interface Laboratory, Purdue University, West Lafayette, IN 47907 USA. eychow@purdue.edu
Summary
A novel high-frequency transmitter enables high data-rate biomedical telemetry. This device successfully transmitted data through porcine skin, demonstrating its potential for advanced medical monitoring applications.
Area of Science:
- Biomedical Engineering
- Electrical Engineering
- Wireless Communication
Background:
- Biomedical telemetry requires efficient data transmission for remote patient monitoring.
- High-frequency signals offer potential for high data rates but face challenges with signal attenuation.
- Advancements in integrated circuit technology enable miniaturized and powerful wireless transmitters.
Purpose of the Study:
- To design and validate a high-frequency transmitter for high data-rate biomedical telemetry.
- To assess the feasibility of transcutaneous data transmission at high frequencies.
- To characterize the performance metrics of the developed transmitter.
Main Methods:
- Designed a high-frequency transmitter using the CMOS IBM7RF 0.18 microm process.
- Tested transcutaneous transmission through a 3.76 mm thick porcine skin sample.
- Measured power consumption, current draw, phase noise, and operating frequency.
Main Results:
- Successfully demonstrated transcutaneous transmission through porcine skin.
- Transmitter operates at approximately 6.7 GHz with a 50 MHz tuning range.
- Achieved a phase noise of -72 dBc/Hz at 100 KHz, transmitting over 440 microW.
- Consumed 4.9 mA current from a 1.8 V supply.
Conclusions:
- The designed high-frequency transmitter is suitable for high data-rate biomedical telemetry.
- Transcutaneous transmission at high frequencies is feasible, overcoming signal attenuation challenges.
- The integrated CMOS transmitter offers a promising solution for advanced implantable or wearable medical devices.
