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A wireless implantable multichannel digital neural recording system for a micromachined sieve electrode
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Date
1998
Author
Akın, Tayfun
Najafi, K.
Bradley, R.M.
Metadata
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This paper reports the development of an implantable, fully integrated, multichannel peripheral neural recording system, which is powered and controlled using an RF telemetry link, The system allows recording of +/-500 mu V neural signals from axons regenerated through a micromachined silicon sieve electrode, These signals are amplified using on-chip 100 Hz to 3.1 kHz bandlimited amplifiers, multiplexed, and digitized with a low-power (<2 mW), moderate speed (8 mu s/b) current-mode 8-b analog-to-digital converter (ADC), The digitized signal is transmitted to the outside world using a passive RF telemetry link, The circuit is implemented using a bipolar CMOS process, The signal processing CMOS circuitry dissipates only 10 mW of power from a 5-V supply while operating at 2 MHz and consumes 4 x 4 mm(2) of area, The overall circuit including the RF interface circuitry contains over 5000 transistors, dissipates 90 mW of power, and consumes 4 x 6 mm(2) of area.
Subject Keywords
Biomedical sensor
,
Interface circuit
,
RF circuit
URI
https://hdl.handle.net/11511/28322
Journal
IEEE Journal of Solid-State Circuits
DOI
https://doi.org/10.1109/4.654942
Collections
Department of Electrical and Electronics Engineering, Article