Proceedings of the 3rd International
IEEE EMBS Conference on Neural Engineering Kohala Coast, Hawaii, USA, May 2-5, 2007
Wireless telemetry of bioelectrodes can be accomplished over distances by using the biopotential to directly modulate the characteristics of a simple passive resonant circuit consisting of two varactor diodes and an inductor. Backscattered radio frequency energy at or near the circuit resonance in the 300 MHz region is amplitude modulated by the biopotential and detected by a remote receiver. -
Miniaturization of radio transmitters for implantation in the human body still requires biotelemetry applications that induce high stress to excite neural spikes for both markers and comparison analysis to distinguish vowel /consonant/vowel representations in recorded brain wave
phase sensitive detection. The demodulator(the Encoding System) is constructed around a frequency mixer. whose output is then amplified and bandpass filtered.-Bruce C.Towe
Mohseni, P, Najafi, K., Eliades, S. Wang, X., “Wireless Multichannel Biopotential Recording Using an Integrated FM Telemetry Circuit”, IEEE Trans. Neural Systems and Rehab Engineering, Vol 13, no3, Sept 2005.
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 Wise, K., Anderson, D., Hetke, J., Kipke, D., Najafi, K., “Wireless Implantable Microsystems: High Density Electronic Interfaces to the Nervous System”, Proc. IEEE, vol. 92, no.1, pp.76-97, January 2004.
 Tang, Z., Smith, B.,Schild, J., Peckham, H., “Data Transmission from Implantable Biotelemeter Load Shift Keying Using Circuit Configuration Modulato
Troyk, Philip R., “Injectable Electronic Identification, Monitoring, and Stimulation Systems”, in Ann. Rev. Biomed. Eng., Vol 01:177-209, 1999.  Mass, W., Von Arx, J., “Passive Telemetry System for Implantable Medical Device”, US patent #6,889,086.
 Microelectromechanical Systems, V ol. 9, No. 4, December 2000.
Experimentally measured bandpass of the wireless circuit system . ECG waveform of about 1 mV amplitude from bioelectrodes on a human subject telemetered over a 10 cm distance using interface
Monday, February 3, 2014
Passive Backscatter Biotelemetry for Neural Interfacing
Posted by vvvvv at 9:24 PM