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. 31, 1982
Filed:
Jun. 03, 1980
Ned E Abbott, McKinney, TX (US);
Hampapur R Keshavan, Dallas, TX (US);
Robert J McGuire, Richardson, TX (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
A muldem (100) has a monitor (101) for testing data path failures through the muldem (100) by comparing the latter's input and output. The monitor (101) tests itself by injecting errors into one of the compared data streams for detection thereof if the monitor (101) and comparing means (806, FIG. 13a and b) is operating properly. Error injection is particularly accomplished by an error generator (922, FIG. 14) synchronously clocked with a data stream (904) through an exclusive OR gate (938). The error generator (922) includes a free running gated oscillator (924) and a pair of ganged flip-flops (926, 928) toggled by a clock signal (936) recovered from the data stream (904).