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:
Oct. 23, 1990
Filed:
Mar. 09, 1988
Shohei Yamazaki, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
A magnetic recording and reproducing device of a type recording and reproducing a signal on a magnetic recording medium such as a tape by using a rotary head and performing a tracking control by detecting crosstalk components of pilot signals on left and right adjacent tracks and comparing these components with each other comprises a pilot signal detection circuit for detecting a pilot signal during fast feeding or rewinding of the magnetic recording medium and speed control circuit for controlling at least one of rotation speed of the rotary head and running speed of the magnetic recording medium so that the pilot signal can be detected substantially at its predetermined frequency during the fast feeding or the rewinding. A speed control servo loop is formed during fast feeding or rewinding so as to detect a pilot signal substantially at its predetermined frequency so that a substantially predetermined relative speed between the magnetic recording medium and the rotary head is maintained and information recorded on the magnetic recording medium can be read in a stable manner.