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:
Aug. 06, 1985
Filed:
May. 02, 1983
Applicant:
Inventors:
Michael J Funke, Westford, MA (US);
Douglas A Topliffe, Nashua, NH (US);
Donald J Rathbun, Andover, MA (US);
Assignee:
Honeywell Information Systems Inc., Waltham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ; G11B / ;
U.S. Cl.
CPC ...
375120 ; 331 / ; 360 51 ;
Abstract
A diskette read data recovery system generates a clock which is locked to an incoming data stream. In a phase locked loop, a signal generated by an oscillator and frequency dividers is compared in phase to the incoming data stream to provide first or second signals depending on whether the incoming data signal leads or lags the clock signal. In order that the system may handle different types of incoming signals, different frequency divider circuits in the phase locked loop are selected for different incoming signals.