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:
Jan. 05, 1999
Filed:
Jul. 24, 1995
Hideo Hibino, Kawasaki, JP;
Norikazu Yokonuma, Yokohama, JP;
Kazuyuki Kazami, Tokyo, JP;
Yoichi Yamazaki, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A magnetic data recording apparatus magnetically records various items of data on a film in accordance with a feed of the film by a PPM Pulse Position Modulation (PPM) recording method. The apparatus includes a PPM signal converting circuit for converting the data to be recorded into a PPM signal and outputting the PPM signal, a magnetic head and a head driving circuit for driving the magnetic head on the PPM signal outputted from the PPM signal converting circuit. The apparatus further includes a data quantity calculating circuit for calculating a quantity of the data to be recorded during a feed of the film. The PPM signal converting circuit determines a change-of-signal position of the PPM signal within one period on the data quantity calculated by the data quantity calculating circuit.