Patent · US Active

High input impedance, high dynamic range, common-mode-interferer tolerant sensing front-end for neuromodulation systems

US11025215B2 · kind B2 · utility

0Cited by

9References

14Claims

0Family size

Assignee

The Regents of the University of California · US

Inventors

Hariprasad Chandrakumar · Los Angeles, US
Dejan Markovic · Los Angeles, US

Key dates

Filing date	Dec 7, 2017
Grant date	Jun 1, 2021
Priority date	—
Expiry date	Dec 29, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2203/45138
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

Neuromodulation systems in accordance with embodiments of the invention can use a feed-forward common-mode cancellation (CMC) path to attenuate common-mode (CM) artifacts appearing at a voltage input, thus allowing for the simultaneous recording of neural data and stimulation of neurons. In several embodiments of the invention, the feed-forward CMC path is utilized to attenuate the common-mode swings at Vin,CM, which can restore the linear operation of the front-end for differential signals. In several embodiments, the neuromodulation system may utilize an anti-alias filter (AAF) that includes a duty-cycles resistor (DCR) switching at a first frequency f1, followed by a DCR switching at a second frequency f2. The AAF allows for a significantly reduced second frequency f2 that enables the multi-rate DCR to increase the maximum realizable resistance, which is dependent upon the frequency ratio f1/f2.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.