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. 14, 2013
Filed:
Aug. 07, 2009
Ping Xiao, East Palo Alto, CA (US);
Weiying Ding, Saratoga, CA (US);
Ping Xiao, East Palo Alto, CA (US);
Weiying Ding, Saratoga, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
A sensing circuit for comparing current flow through a reference resistance with current flow through a resistive device under test (DUT) such as a fuse. The sensing circuit includes a comparator having a first PMOS transistor and a first NMOS transistor connected in series between a first input and a first node and a second PMOS transistor and a second NMOS transistor connected in series between a second input and the first node. The first PMOS and NMOS transistors are cross-coupled with the second PMOS and NMOS transistors. Specifically, a first output is connected to the first node to the gates of the second PMOS and second NMOS transistors and a second output is connected to the second node and to the gates of the first PMOS and first NMOS transistors. The reference resistance is connected to one of the inputs and the DUT is connected to the other input.