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:
Apr. 30, 1985
Filed:
Aug. 23, 1982
Applicant:
Inventor:
Thomas J Starr, Wheaton, IL (US);
Assignee:
AT&T Bell Laboratories, Murray Hill, NJ (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
371 15 ; 364900 ; 371 22 ;
Abstract
A bus fault location arrangement for locating the source of a fault condition on a bus connecting a plurality of devices energized by a power supply. When such a fault condition is detected, a bus diagnostic unit included in the arrangement transmits a signal to place a given one of the plurality of devices in a high impedance state. The bus diagnostic unit then transmits a given signal level on the bus. To determine whether the given device is the source of the fault condition, current flow between the device and the power supply is sensed and an error signal is stored when the sensed current exceeds a predetermined magnitude.