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:
May. 20, 2003
Filed:
May. 23, 2002
Fujitsu Limited, Kawasaki, JP;
Abstract
Upon receiving a level of a second node through a third switch in the first half of a first period, a holding circuit outputs it as a fuse signal indicating a blown-out state of a fuse. Since the third switch turns off in the second half of the first period, a change in level of the second node occurring thereafter will not affect data in the holding circuit, whereby prevents malfunction of a fuse circuit. With the fuse blown, a level of a first node gets fixed at that of a second power supply line after the first period. This eliminates a voltage difference between both ends of the fuse, thereby preventing a growback. No occurrence of growback makes just one fuse blowing sufficient for the fuse circuit even with the fuse not completely cut off. This consequently shortens a time for blowing the fuse in a test process.