18694280. DIGITALLY ASSISTED SENSOR RECORDING CIRCUIT WITH CONTINUOUS OFFSET CANCELLATION (THE REGENTS OF THE UNIVERSITY OF CALIFORNIA)
DIGITALLY ASSISTED SENSOR RECORDING CIRCUIT WITH CONTINUOUS OFFSET CANCELLATION
Organization Name
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor(s)
Patrick Mercier of La Jolla CA US
DIGITALLY ASSISTED SENSOR RECORDING CIRCUIT WITH CONTINUOUS OFFSET CANCELLATION
This abstract first appeared for US patent application 18694280 titled 'DIGITALLY ASSISTED SENSOR RECORDING CIRCUIT WITH CONTINUOUS OFFSET CANCELLATION
Original Abstract Submitted
A method for obtaining neural signals from a neural signal sensor includes extracting sensor offset from a neural input signal. Sensor offset is removed from N-channels that share a single amplifier. The neural input signal is acquired from the analog domain by neural electrodes with varying DC-offset and the method includes multiplexing the N-channels via a time divisional multiple access procedure into a single neural amplifier An integrated digitally assisted neural recording system includes an analog multiplexer structured to receive N-channels and to multiplex the N-Channels into a single neural amplifier. A feedback loop is configured to cancel electrode offset voltage in the digital domain by generating electrode offset voltage samples and adding delay to align each electrode offset voltage sample to be subtracted at the neural amplifier in the analog domain.
