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. 01, 2004
Filed:
Jan. 30, 2002
Applicant:
Inventors:
Mark David Heminger, Rochester, MN (US);
Robert Edward Jansen, Byron, MN (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J 1/32 ;
U.S. Cl.
CPC ...
G01J 1/32 ;
Abstract
Micro-electromechanical apparatus and method with position sensor compensation to compensate for sensor drift. A preferred embodiment comprises modifying the intensity of a light source used in position detection to maintain a constant sum of the voltages output from photodetectors receiving light from the light source. Preferred embodiments may be implemented in digital signal processor code, or external to the processor in analog circuitry. By adjusting light source intensity, position calculations may be performed without normalization, and thus without a time-consuming division operation.