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:
Feb. 08, 2005
Filed:
Aug. 02, 2001
Hiroshi Miyajima, Hachioji, JP;
Hideharu Miyahara, Hachioji, JP;
Hiroshi Miyajima, Hachioji, JP;
Hideharu Miyahara, Hachioji, JP;
Olympus Corporation, Tokyo, JP;
Abstract
The present invention relates to an actuator drive apparatus capable of eliminating the influence of the mutual induction effect of a drive coil and a detection coil with a simple structure. That is, the present invention is an actuator drive apparatus capable of causing a movement of the drive coil of a scanner by applying an electric current thereto, and generating and maintaining the resonance state by feeding back an output signal of the detection coil at that moment. In particular, the present invention uses a rectangular wave as the drive signal and includes an LPF for eliminating a specific high frequency component of an output signal of the detection coil.