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:
Sep. 05, 2000
Filed:
Sep. 24, 1998
Louis Bennie Capps, Jr, Round Rock, TX (US);
Robert Christopher Dixon, Austin, TX (US);
Thoi Nguyen, Austin, TX (US);
Khuong Huu Pham, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A bus termination impedance verification circuit. The verification circuit includes a sense circuit comprised of a sense input node and a sense output node. A sense node of the sense circuit is connected to a signal conductor of a bus to detect the termination impedance of the bus. The voltage of the sense output node is indicative of the termination impedance of the bus when the sense circuit input node is activated. The comparator circuit includes a comparator input node and a comparator output node. The comparator input node is connected to the sense circuit output node. The comparator circuit is configured such that the comparator output node is indicative of whether the voltage of the comparator input node is within a specified voltage range. The voltage of the signal conductor, as detected by the sense circuit, will be a function of the impedance of the termination circuits connected to the bus. An excess or shortage of termination circuits connected to the bus will result in a detected control signal voltage that is not within the specified limits.