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. 14, 2009
Filed:
Jan. 18, 2005
Louis L. Hsu, Fishkill, NY (US);
Matt R. Cordrey-gale, Droxford, GB;
James S. Mason, Eastleigh, GB;
Philip J. Murfet, Stockbridge, GB;
Karl D. Selander, Hopewell Junction, NY (US);
Michael A. Sorna, Hopewell Junction, NY (US);
Huihao Xu, Brooklyn, NY (US);
Louis L. Hsu, Fishkill, NY (US);
Matt R. Cordrey-Gale, Droxford, GB;
James S. Mason, Eastleigh, GB;
Philip J. Murfet, Stockbridge, GB;
Karl D. Selander, Hopewell Junction, NY (US);
Michael A. Sorna, Hopewell Junction, NY (US);
Huihao Xu, Brooklyn, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A data receiver is provided which includes a front end interface circuit having an alternating current (AC) transmission receiving mode and a direct current (DC) transmission receiving mode. The front end interface circuit includes an offset compensation circuit operable to compensate a DC voltage offset between a pair of differential signals input to the data receiver. The front end interface circuit further includes an AC/DC selection unit operable to switch between (a) the DC transmission receiving mode, and (b) the AC transmission receiving mode, such that the data receiver is operable in (i) the DC transmission mode in which the offset compensation circuit is disabled, (ii) the DC transmission mode in which the offset compensation circuit is enabled, (iii) the AC transmission mode in which the offset compensation circuit is disabled, and (iv) the AC transmission receiving mode in which the offset compensation circuit is enabled.