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:
Feb. 13, 1990
Filed:
Jul. 20, 1988
Mishio Hayashi, Saitama, JP;
Advantest Corporation, Tokyo, JP;
Abstract
A pseudo random pattern generating device generates a pseudo random pattern, which recurs on a cycle of (2.sup.n -1) bits. The device sequentially converts from parallel to serial form 2.sup.m -bit patterns read out of a pattern memory having stored at each address a subpattern composed of one of 2.sup.n-m split patterns. A basic pseudo random pattern is split at intervals of 2.sup.m bits and a continuation pattern of a predetermined number of bits subsequent to each split pattern in the recurring random pattern. A pattern of 2.sup.m bits to be taken out of each subpattern which is read out of the pattern memory is shifted one bit position upon each readout of 2.sup.n-m subpatterns.