The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 2026
Filed:
Jul. 27, 2022
Zhejiang Lab, Hangzhou, CN;
Tao Tang, Hangzhou, CN;
ZHEJIANG LAB, Hangzhou, CN;
Abstract
The present application discloses a method for eliminating multi-channel gain errors of an EEG signal acquisition system. The system includes an acquisition electrode, decoupling input capacitors, input units, intra-channel chopper modulators, inter-channel chopper modulators, fully differential closed-loop amplifiers, inter-channel chopper demodulators, intra-channel chopper demodulators, low-pass filters and an output unit sequentially arranged in a signal flow direction of channels. The method includes a process of intra-channel chopping modulation, multi-level inter-channel chopping modulation, amplification, multi-level inter-channel chopping demodulation, intra-channel chopping demodulation, and low-pass filtering. The present application eliminates gain errors between channels, ensures signal acquisition accuracy, and avoids flicker noise in amplifiers.