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:
Dec. 29, 1992
Filed:
Feb. 12, 1991
Fumio Tajima, Ibaraki, JP;
Hiroshi Katayama, Hitachi, JP;
Taizou Miyazaki, Hitachi, JP;
Shigeki Morinaga, Hitachi, JP;
Nobuyoshi Mutoh, Katsuta, JP;
Seiichi Narushima, Landsberg am Lech, DE;
Hitachi, Ltd., Tokyo, JP;
Abstract
There is provided position error computing means for sampling an error value between a position detecting signal derived from means for detecting the position of a moving body and a position command signal supplied from outside and for computing a position error value on the basis of two or more past values of said error values. There is also provided a position control apparatus in which the magnitude of a gain of a position control loop is changed according to the above described position error value. Further, there is also provided a signal reproducing apparatus or a magnetic signal reproducing apparatus using the above described position control.