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:
Aug. 30, 2005
Filed:
Jun. 17, 2003
Roy M. Carlson, Plymouth, MN (US);
David O. Erstad, Minnetonka, MN (US);
Roy M. Carlson, Plymouth, MN (US);
David O. Erstad, Minnetonka, MN (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
A system and method for hardening a Null Convention Logic (NCL) circuit against Single Event Upset (SEU) is presented. Placing a resistive element into a feedback loop of the NCL circuit may harden the NCL circuit. A bypass element may be placed in parallel with the resistive element to increase the latching speed of the hardened NCL circuit. Additionally, replacing transistors in an input driver, the feedback loop, and an inverter with transistor stacks, which may include two or more transistors connected in series, may harden the NCL circuit. Further, two NCL gates may be cross-coupled to harden the NCL circuit.