Signal amplification, detection and transmission in a wireless 100-electrode neural recording system

We are developing a fully-implantable neural recording system with wireless power and data transfer. As part of this system, we have developed a low-power integrated circuit that performs power rectification and regulation, reception of configuration data, neural signal amplification and filtering,...

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Bibliographic Details
Main Authors: Watkins, P.T., Kier, R.J., Lovejoy, R.O., Black, D.J., Harrison, R.R.
Format: Conference Proceeding
Language:English
Subjects:
Filtering
Frequency shift keying
Gain
Neurotransmitters
Radio frequency
Radiofrequency amplifiers
Radiofrequency integrated circuits
RF signals
Signal detection
Signal resolution
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Summary:We are developing a fully-implantable neural recording system with wireless power and data transfer. As part of this system, we have developed a low-power integrated circuit that performs power rectification and regulation, reception of configuration data, neural signal amplification and filtering, spike detection, neural signal digitization and RF transmission. The chip includes 88 amplifiers having a gain of 60 dB from 1 to 5 kHz. An integrated ADC operates at 15 kSamples/sec with 9-bit resolution. A 433-MHz RF transmitter uses FSK modulation to transmit one digitized neural signal and spike detection data from all channels. Total power consumption is 13.5 mW
ISSN:0271-4302
2158-1525
DOI:10.1109/ISCAS.2006.1693054