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. 24, 1982
Filed:
Aug. 07, 1980
Seiei Ohkoshi, Yokohama, JP;
Isao Ishikawa, Yokohama, JP;
Teiji Okamoto, Yokohama, JP;
Nobuo Tsukamoto, Tachikawa, JP;
Hitachi, Ltd., Tokyo, JP;
Nippon Telegraph & Telephone Public Corporation, Tokyo, JP;
Abstract
A code converting circuit of simple construction composed of an exclusive OR circuit and a flip-flop circuit is provided on each of transmitting and receiving sides of a digital data transmission system according to a differential phase shift keying system, to convert two consecutive errors on adjacent bits peculiar to the differential phase shift keying system into only an error on a single bit. As a result, it is not required to employ a code having an excellent error-correcting capacity in the digital data transmission system, and thus a high transmission efficiency is attained by the use of a code which is relatively deficient in error correcting capacity.