US Patent 7138835 Method and apparatus for an equalizing buffer

Patent 7138835 was granted and assigned to Xilinx on November, 2006 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Xilinx

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

71388350

Patent Inventor Names

Michael J. Gaboury0

Date of Patent

November 21, 2006

Patent Application Number

104451140

Date Filed

May 23, 2003

Patent Primary Examiner

‌

Timothy P. Callahan

Patent abstract

A programmable, equalizing buffer is provided having feedback transistors used to vary the transfer function of the equalizing buffer, such that a low pass response of a transmission channel is substantially equalized. A zero in the buffer's transfer function is established by a conductive state of transistors caused by signal feedback. Multiple transistors establish increased flexibility for establishing the location of the zero, while a cascade of buffer stages provides a second order transfer function effective to cancel second order channel effects.