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. 17, 1991
Filed:
Mar. 10, 1989
Tooru Sasaki, Matsubara, JP;
Nobukazu Hosoya, Nara, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
Provided is a signal reproducing circuit for an optical disc player including a multidivisional photodetector with photoelectric converting elements in a preceding side and photoelectric converting elements in a succeeding side relative to a proceeding direction of pits of an optical disc, a variable delay circuit for delaying outputs from the photoelectric converting elements in the preceding side, a circuit for detecting a time difference between an output from the photo electric converting elements in the succeeding side and an output from the variable delay circuit, and a circuit responsive to an output from the time difference detecting circuit for changing a delay time of the variable delaying circuit. The signal reproducing circuit further includes a circuit for amplifying and correcting high frequency components of signals reproduced by the photo detector in response to the output from the time difference detecting circuit. This structure extends a reproduced frequency band, improves a high frequency characteristic of the video signals reproduced from the optical disc and supplies video signals having superior frequency characteristics.