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. 19, 1998
Filed:
Mar. 25, 1996
Robert A Brunner, Redondo Beach, CA (US);
Hughes Electronics Corporation, El Segundo, CA (US);
Abstract
A switch matrix having internal redundancy by combining outputs of two internal channels to form one single internally redundant channel. 1 by N, M by 1 and M by N switch matrices may be constructed using the principles of the present invention. Each input signal line is coupled between a signal input and a terminating resistor and each output signal line is coupled between a signal output and a terminating resistor. Switching nodes are formed that comprise an input line, a plurality of output lines, and a plurality of pairs of couplers that are respectively interconnected by way of respective switches used to select the input line and couple it to a respective output line. Pairs of output signal lines are connected to a single signal output to form internally redundant channels. The nodes may include a second serially coupled switch connected between the input and output couplers to provide redundancy if either one of the switches fail in a closed state. Amplifiers may optionally be disposed in each of the output signal lines.