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:
Dec. 29, 1992
Filed:
Feb. 05, 1990
James A Pavlu, Huntington Beach, CA (US);
Gary L Heimbigner, Anaheim, CA (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
The present invention provides a unique circuit and layout methods for improving upon series redundant circuits. A substitution device, comprising a pair of series connected N or P FETs for respective single FETs, can be further hardened or enhanced against cosmic rays, particles, etc. by spacing the P FETs a predetermined distance apart so that an ion or other particle cannot strike or affect both channels simultaneously, thus avoiding upset. When these devices are placed in cells (i.e., ASIC) in logic or the like circuits, the predetermined spacing is related to cell height. Also, alignment of the gates of the substitution device on a common axis minimizes the window of a satellite through which a particle could effectively strike the common gate axis possibly to upset both gates.