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. 21, 2002
Filed:
Oct. 30, 1998
Applicant:
Inventors:
Michael C. Fischer, Palo Alto, CA (US);
Josh Hogan, Los Altos, CA (US);
Terril Hurst, Fremont, CA (US);
Daniel Y. Abramovitch, Palo Alto, CA (US);
Carl Taussig, Woodside, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 2/900 ; G01R 1/900 ; H03K 5/00 ;
U.S. Cl.
CPC ...
G11C 2/900 ; G01R 1/900 ; H03K 5/00 ;
Abstract
A data decoder for decoding digital data in a high frequency signal in an optical storage device. A carrier signal derived from the high frequency passed through a zonal bandpass filter and a limiter is multiplied by the high frequency signal passed through a high pass filter. The resulting product is filtered and passed through a comparator forming a digital data stream.