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. 14, 1989
Filed:
Jun. 27, 1986
Applicant:
Inventors:
Masahiro Nasu, Furukawa, JP;
Kiyoto Abe, Furukawa, JP;
Assignee:
Alps Electric Co., Ltd., , JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 65 ; 360 46 ; 360 67 ;
Abstract
A magnetic recording and reproducing apparatus wherein mechanical deteriorations and induced noises can be eliminated and detection signals different in recording density can be read by a reading circuit without a misoperation. The apparatus comprises a filter circuit including a switching element for changing over between different impedance elements in order to allow reproduction from a magnetic medium which is recorded in a recording period which is different from recording and reproducing characteristics of said magnetic head. Preferably, the switching element is a field effect transistor.