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:
Mar. 17, 1992
Filed:
Jul. 18, 1989
Ikuo Taniguchi, Inagi, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A switching trigger detection circuit is comprised of a selection unit, a memory unit, and first and second discrimination units. The memory unit stores switching trigger data of each of the line systems related to various switching trigger information at respective bit locations, and the selection unit sequentially specifies the bit location. The first and second discrimination units generate a fault occurrence signal and a fault recovery signal by watching the bit pattern of the switching trigger data stored in the memory unit. A shift of the bit locations is achieved along a guard time including a plurality of guard numbers, and each scan of the swtiching trigger data corresponds to each guard number. Further, the first and second discrimination units are comprised of logic gates to thereby assure a high speed discrimination.