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:
Jun. 23, 1987
Filed:
Dec. 23, 1985
Kazunori Nakamura, Hadano, JP;
Mitsuhiro Yamaga, Kawasaki, JP;
Ryozo Yoshino, Hadano, JP;
Norihiko Sugimoto, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Microcomputer Engineering Ltd., Tokyo, JP;
Abstract
A decoding circuit is operative to decode a differential Manchester code consisting of four symbols 'J', 'K', '1' and '0' each composed of two consecutive signal elements. For detection of the symbol 'J' and consequent determination of the symbol boundary, the decoding circuit has a circuit configuration which takes advantage of the fact that the symbol 'K' immediately follows the symbol 'J' and three consecutive signal elements, two of which are included in the symbol 'J' and one of which is for a symbol immediately preceding the symbol 'J', have the same polarity. To prevent an error that a second occurrence of the symbol 'J' is detected after completion of detection of the symbol 'J', the decoding circuit has an additional circuit configuration which inhibits the detection of the symbol 'J' until the symbol '0' or the symbol '1', for example, is detected.