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:
Mar. 14, 1989
Filed:
Mar. 14, 1984
Applicant:
Inventor:
Martinus P Bierhoff, Eindhoven, NL;
Assignee:
U.S. Philips Corp., New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
O11B / ;
U.S. Cl.
CPC ...
369 45 ; 369 50 ; 250201 ;
Abstract
An apparatus is described for reading an optically readable record carrier, in which apparatus various control signals are derived from signals obtained by sampling the signals supplied by two optical-detector halves with the bit frequency both during the intermediate areas and the pits, the samples taken during the pits being processed separately from the samples taken during the intermediate areas. Preferably, only one sample is taken for each pit and each intermediate area, namely only if the pit or intermediate area is longer than a specific number of clock periods.