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. 20, 2001
Filed:
Feb. 23, 1999
Applicant:
Inventor:
William L. Devanney, Menlo Park, CA (US);
Assignee:
Clear Logic, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H 3/776 ;
U.S. Cl.
CPC ...
H01H 3/776 ;
Abstract
A zero static power laser fuse circuit is formed from one laser fuse and three transistors, with the fuse connected in series to a reverse-biased diode and with the common node of the fuse and diode connected to the input of a driving circuit, such as a CMOS inverter. Blowing the fuse allows a small subthreshold conduction current to flow to the common node and pull the node to the opposite logic state. This fuse circuit, which allows the capacitance at the common node to be minimized for zero static power operation, requires less circuit area than previous zero static power fuse circuits.