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. 18, 1984
Filed:
Feb. 06, 1984
Applicant:
Inventors:
John M Zapisek, Hauppauge, NY (US);
John F Tweedy, Jr, Bellerose Village, NY (US);
Gus Giulekas, West Hempstead, NY (US);
Assignee:
Standard Microsystems Corporation, Hauppauge, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375110 ; 375118 ; 307269 ; 307511 ; 328 63 ; 328 72 ; 328155 ; 360 51 ; 377 46 ; 377 52 ;
Abstract
A data separator for providing data and clock information derived from a floppy disk to a controller includes a synthetic oscillator phase-locked loop which adjusts the phase of the derived clock, thereby to tend to position data inputs within the central portion of their associated half-bit slots. The center frequency of the synthetic oscillator may be modified in accordance with prior phase adjustments to compensate for variations in the speed of the floppy disk drive.