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. 05, 2008
Filed:
May. 09, 2006
Jonathan Audy, Los Gatos, CA (US);
Trey Roessig, Fremont, CA (US);
Jonathan Audy, Los Gatos, CA (US);
Trey Roessig, Fremont, CA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A dynamically read fuse cell includes a first circuit which includes a known reference resistance R, and a second circuit which includes a programmed fuse having a resistance R; the state of the programmed fuse is to be read. The first and second circuits receive a common 'read' signal, and are arranged to produce first and second outputs which begin changing state in response; the first and second outputs have respective slew rates which vary with Rand R, respectively. The first and second circuits are interconnected such that causing both outputs to begin changing state in response to the 'read' signal triggers a time domain race condition, the result of which indicates which of the outputs slewed more quickly in response to the “read” signal, thereby indicating the relationship between Rand Rand, when Ris properly chosen, the state of the fuse.