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:
Nov. 27, 2001
Filed:
Oct. 21, 1999
Dan M. Goebel, Tarzana, CA (US);
David E. Lewis, Torrance, CA (US);
Ronglin Liou, Alhambra, CA (US);
Hughes Electronics Corporation, El Segundo, CA (US);
Abstract
A protection circuit (,) for a Traveling Wave Tube having multiple tone operation. The protection circuit (,) is a dual sensor (,) arrangement. One sensor (,) is an operational amplifier circuit (,) having a short time constant and a high threshold current. The first sensor (,) provides protection against short time scale faults. The second sensor (,) is an operational amplifier circuit (,) having a time constant higher than the first sensor (,) and a lower current threshold than the first sensor (,) to provide protection against long time scale events. The two sensors (,and,) are logically “OR”ed with each other and eliminate spurious shutdowns and circuit damage.