Patent ID: 8332024

Claim:
An ultra-low-power microelectronic system for wireless neural recording capable of being completely implanted in the brain, comprising: a plurality of neural amplifiers with adaptive power biasing used in multi-electrode arrays, wherein said neural amplifiers comprise a gain stage implemented using an all-subthreshold and folded cascode architecture to allow low-voltage operation and a bandwidth limiting stage to maintain a constant overall bandwidth and to vary a bias current of said gain stage so as to adjust a noise per unit bandwidth of said gain stage; an adaptive learning architecture for neural signal decoding that uses a continuous-time analog gradient descent algorithm to learn a decoding filter via supervised learning or other learning techniques that is implantable in a brain; an impedance-modulation telemetry system for low-power data telemetry used by a plurality of brain-machine interfaces to transmit RF data from the brain flexibly and efficiently so as to permit power consumption to occur outside a body rather than within the brain; a wireless link for efficient power transfer.