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:
Jun. 02, 2015
Filed:
Aug. 13, 2012
Knut David Westberg, Uppsala, SE;
Mats Lennart Carlsson, Sundbyberg, SE;
Erik Andreas Dreyfert, Stockholm, SE;
Milena Anguelova, Lindome, SE;
Knut David Westberg, Uppsala, SE;
Mats Lennart Carlsson, Sundbyberg, SE;
Erik Andreas Dreyfert, Stockholm, SE;
Milena Anguelova, Lindome, SE;
PGS Geophysical AS, Oslo, NO;
Abstract
Certain disclosed accelerometer sensors and methods employ a proof mass that is acted upon by multiple feedback paths. One illustrative sensor embodiment includes an electrode arrangement proximate to a proof mass, the electrode arrangement providing multiple electrostatic force centroids on the proof mass. The sensor embodiment further includes multiple feedback paths, each feedback path independently controlling an electrostatic force for a respective centroid, and an output unit that converts signals from the multiple feedback paths into an acceleration-responsive output signal. An illustrative method embodiment derives multiple feedback signals from at least one displacement signal, applies the multiple feedback signals to an arrangement of electrodes that capacitively couple the proof mass to a substrate, and converts the multiple feedback signals into an acceleration signal.