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:
May. 16, 1995
Filed:
Feb. 01, 1993
Mitsuo Oshiba, Tokyo, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
In compliance with a variation in the speed of relative movement between a reciprocating optical recording medium and an optical head, an information regenerating apparatus produces a bit clock precisely and regenerate information correctly. To achieve this purpose, in this apparatus, information regenerating light receiving elements produce preceding and succeeding signals with a time difference between them. Based on a preceding one of the signals, a pulse spacing sampling circuit, a pulse multiple detecting circuit, a memory circuit, and a reference period calculating circuit produce a reference period. Based on a succeeding signal, a circuit for generating a signal to be demodulated produces a demodulated signal. Based on the reference period and a synchronizing signal, a demodulating circuit uses the bit clock generated by the clock generating circuit to demodulate the data carried on the signal to be demodulated.