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:
Aug. 29, 2000
Filed:
Jun. 07, 1999
Applicant:
Inventor:
Yasuo Tambara, Hino, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G11B / ;
U.S. Cl.
CPC ...
396319 ; 360-1 ; 360 25 ; 360 55 ;
Abstract
A magnetic reproduction circuit for cameras has a magnetic head for detecting magnetic information on a film. In this reproduction circuit, an amplifying circuit amplifies an output signal of the magnetic head and a filter circuit detects an envelope of an output signal of the amplifying circuit. A detection time constant on a discharge side of the filter circuit is set to be smaller than a cycle of noise exerting an adverse effect on the amplifier circuit.