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. 07, 2009
Filed:
May. 07, 2007
Yossi Smelloy, Mizpe Kamun, IL;
Ronen Eckhouse, Yuvalim, IL;
Yossi Smelloy, Mizpe Kamun, IL;
Ronen Eckhouse, Yuvalim, IL;
Mellanox Technologies Ltd., Yokneam, IL;
Abstract
A system and method for compensation of offset voltage in a digital differential input buffer driven by a terminated transmission line. Offset compensation currents are injected at the output of the first stage of the input buffer, which has a higher impedance than the terminated transmission line at the input of the buffer. The compensation current is determined by a network of MOS transistors, which saves die space compared to resistors. A pair of voltage multiplexers provides for compensation currents to correct offsets of either polarity. Offset correction currents are determined anew each time the system is powered up, compensating for component aging. The offset correction can also be performed while the input buffer is operating, during periods when the input is quiescent, and/or by adjusting the offset correction according to the duty cycle of the detected input.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile