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:
Jul. 03, 1979
Filed:
Sep. 07, 1977
Takafumi Oka, Odawara, JP;
Hiroshi Nakanishi, Sayama, JP;
Hitachi, Ltd., BOTH OF, JP;
Nippon Telegraph and Telephone Public Corporation, BOTH OF, JP;
Abstract
A feedback shift register for use in a system processing a data signal received from a memory such as a magnetic disc or magnetic drum or from, for example, a communication line so as to detect and correct any error which may present in the data signal. The feedback shift register comprises means for producing address information by making a first logical operation on the input data and the internal state of the shift register, a memory providing data determined by a second logical operation among the bits of the address information upon reception of the address information from the above means, and means for renewing the internal state of the shift register upon reception of the data from the memory. A peculiar polynomial suited to the characteristic of an associated memory, communication line or the like is based on the first and second logical operations, and the shift register can process a high-speed data signal in spite of its simple construction.