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:
Apr. 14, 1998
Filed:
Sep. 19, 1996
Applicant:
Inventors:
Samuel Kay Doran, Wappingers Falls, NY (US);
Erwin Ernst Weissmann, Southbury, CT (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
318561 ; 318601 ; 318632 ;
Abstract
A servo controlled tool and stage positioning system. A circuit in the tool positioning servo control circuit removes unwanted glitches. Glitches are generated by servo control DACs when the servo is at rest. The circuit selectively blocks these glitches from being passed to the tool positioning circuit only when the stage is at rest.