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, 1999
Filed:
Apr. 13, 1998
Applicant:
Inventor:
Ryuichi Matsuzaki, Chiba, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
73105 ; 250306 ;
Abstract
Scanning signals SX and SY produced from a scanning signal-generating portion are directly supplied to a VCM driver amplifier without being attenuated according to the magnification factor. A magnification-setting portion sets the VCM driver amplifier at a magnification factor. A PI control signal produced from a PI control portion is directly supplied to a VCM driver amplifier without being attenuated according to the magnification factor.