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. 18, 1993
Filed:
Jul. 08, 1991
Cathal G Phelan, San Jose, CA (US);
Peter H Voss, San Jose, CA (US);
Thomas J Davies, Eindhoven, NL;
Cormac M O'Connell, Kanata, CA;
Leonardus C Pfennings, deceased, late of Sittard, NL;
Henricus J Kunnen, legal representative, Valkenswaard, NL;
Hans Ontrop, Eindhoven, NL;
U.S. Philips Corp., New York, NY (US);
Abstract
When using a laser programmable fuse, a circuit should be 100% stable both before and after the fuse is blown. So far no CMOS circuit can be 100% stable without drawing a constant current. With the 'Master fuse Enable' scheme one fuse circuit (master fuse) draws current while disabling all other fuse circuits on-chip. Thus giving 100% stability and reducing power consumption on a chip where no fusing has been done. If, however, one wished to use the rest of the fuses, then the master fuse is blown and all fuse circuits now become active and draw current.