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. 26, 1995
Filed:
Jan. 04, 1994
Roger K Russell, Indianapolis, IN (US);
Mark W Voth, Indianapolis, IN (US);
Best Lock Corporation, Indianapolis, IN (US);
Abstract
A method and apparatus are provided for decoding bi-phase encoded data. The apparatus performs the steps of establishing a predicted bit cell length for a bit cell, detecting a leading clocking edge transition of the bit cell, detecting a first edge transition after the leading clocking edge transition, and calculating a first time interval from the leading clocking edge transition to the first detected edge transition. The apparatus also performs the steps of detecting a second edge transition after the leading clocking edge transition, calculating a second time interval from the leading clocking edge transition to the second detected edge transition, comparing both the first time interval and the second time interval to the predicted bit cell length, assigning a logical zero value to the bit cell if the first time interval is closer to the predicted bit cell length than the second time interval, and assigning a logical one value to the bit cell if the second time interval is closer to the predicted bit cell length than the first time interval.