An Implantable Multichannel Digital Neural Recording System For A Micromachined Sieve Electrode

This paper reports the development of an implantable, fully integrated, single-chip, multichannel neural recording system, which is powered and communicated with using an RF telemetry link. The system allows recording of /spl plusmn/500/spl mu/V neural signals from axons regenerated through a micromachined silicon sieve electrode. These signals are amplified using on-chip 100Hz to 3.IkHz bandlimited amplifiers, multiplexed, and digitized with a low-power, high speed current-mode 8-bit ADC, and then transmitted out using a passive RF telemetry link. The overall system dissipates 90mW of power from a 5V supply, and occupies 4x4mm/sup 2/ of area.

[1]  Tayfun Akin,et al.  RF telemetry powering and control of hermetically sealed integrated sensors and actuators , 1990, IEEE 4th Technical Digest on Solid-State Sensor and Actuator Workshop.

[2]  K. Wise,et al.  An implantable CMOS circuit interface for multiplexed microelectrode recording arrays , 1992 .

[3]  K. Najafi,et al.  A micromachined silicon sieve electrode for nerve regeneration applications , 1994, IEEE Transactions on Biomedical Engineering.

[4]  D. G. Nairn,et al.  Ratio-independent current mode algorithmic analog-to-digital converters , 1989, IEEE International Symposium on Circuits and Systems,.

[5]  Tayfun Akin,et al.  A micromachined silicon sieve electrode for nerve regeneration applications , 1991, TRANSDUCERS '91: 1991 International Conference on Solid-State Sensors and Actuators. Digest of Technical Papers.