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:
Sep. 04, 1984
Filed:
Jul. 06, 1982
Applicant:
Inventors:
Richard W Van Pelt, Boulder, CO (US);
Donald F McCarthy, Jefferson County, CO (US);
Assignee:
Storage Technology Corporation, Louisville, CO (US);
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; H03L / ;
U.S. Cl.
CPC ...
360 51 ; 331 25 ;
Abstract
A data clocking and detection system for a digital data storage system includes a common controlled oscillator for the multiple tracks. A phase detector for each track includes a counter and decoding circuitry producing outputs representing the time occurrence of transitions in the data with respect to bit cells defined by multiple clock pulses for each bit cell. Phase errors are used to control the frequency of the VCO, and large phase errors are used to add or subtract a count from the phase counter in each phase detector.