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:
Jun. 12, 2001
Filed:
Sep. 22, 1997
Johnny Q. Zhang, Ft. Collins, CO (US);
David B. Hollenbeck, Ft. Collins, CO (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A termination structure is shown whereby multiple transmission lines designed to have the same intrinsic impedance and same delay are driven from a central node. The central node is driven by a driver and calibration resistor connected in series to produce a drive impedance that is equal to the parallel combination of the intrinsic impedances of the multiple transmission lines. At the other end of the multiple transmission lines is a receiver and a feedback circuit. The feedback circuit provides a modest amount of positive feedback from the output of the receiver to the input of the receiver. This positive feedback prevents the output of the receiver from being affected by small reflections and perturbations that result from mismatches among the multiple transmission lines.