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:
Nov. 16, 2004
Filed:
Jan. 06, 2003
William P. Platt, Columbia Heights, MN (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
A method for reducing effects of common mode oscillations between two respective proof masses in micro-electromechanical systems (MEMS) devices is described. The MEMS devices also include a motor pickoff comb, a sense plate, and a motor drive comb for each proof mass. The method includes amplifying signals received from respective motor pickoff combs, inverting the amplified signal from one of the motor pickoff combs, and generating a difference signal between the inverted, amplified signal from one pickoff comb, and the non-inverted, amplified signal from the other pickoff comb. The method also includes inputting the difference signal into a control loop and generating motor drive signals for respective motor drive combs with the control loop.