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. 08, 2011
Filed:
Jul. 14, 2009
Nick Rosik, Torrance, CA (US);
Richard D Young, Lawndale, CA (US);
Mark E Stading, Hermosa Beach, CA (US);
Denpol Thammanukultorn, Chino Hills, CA (US);
Nick Rosik, Torrance, CA (US);
Richard D Young, Lawndale, CA (US);
Mark E Stading, Hermosa Beach, CA (US);
Denpol Thammanukultorn, Chino Hills, CA (US);
Raytheon Company, Waltham, MA (US);
Abstract
A circuit for electric fuses includes circuits for sensing status and programming that have separate paths for each operation. The circuit includes a plurality of electrically programmable fuses and, associated with each fuse, a switch for coupling a first terminal of the fuse to a ground supply for programming or to a comparator for sensing. The circuit uses a switched current source to supply current to the fuses for programming. The comparator senses a fuse status when a current source is switched through the fuse. The comparator compares a voltage across the fuse and associated switches to a comparison voltage across a comparison resistor and switches included for matching.