公开(公告)号：US20170222845A1

公开(公告)日：2017-08-03

申请号：US15400647

申请日：2017-01-06

Applicant: Rambus Inc.

Inventor： Jared L. Zerbe ,  Bruno W. Garlepp ,  Pak S. Chau ,  Kevin S. Donnelly ,  Mark A. Horowitz ,  Stefanos Sidiropoulos ,  Billy W. Garrett ,  Carl W. Werner

IPC: H04L25/49 ,  H04L25/02 ,  G11C8/10 ,  G06F13/16 ,  G06F13/40 ,  G11C7/10 ,  H04L25/03 ,  H04L7/033

CPC classification number: H04L25/4917 ,  G06F13/1678 ,  G06F13/4068 ,  G11C7/10 ,  G11C7/1051 ,  G11C7/1057 ,  G11C7/106 ,  G11C7/1072 ,  G11C7/1078 ,  G11C7/1084 ,  G11C7/1087 ,  G11C7/22 ,  G11C8/10 ,  G11C11/56 ,  G11C27/02 ,  G11C2207/108 ,  H04L7/0331 ,  H04L7/0332 ,  H04L25/0272 ,  H04L25/0282 ,  H04L25/0296 ,  H04L25/0298 ,  H04L25/03006 ,  H04L25/03057 ,  H04L25/08 ,  H04L25/4902

Abstract: An integrated circuit device includes an output driver having a data signal terminal, logic circuitry, and a driver circuit coupled to the logic circuitry and data signal terminal. The driver circuit is configured to drive a signal corresponding to a symbol onto the data signal terminal, wherein the symbol is an N-bit symbol, having one of 2N predefined values, N is an integer greater than 1, and the signal corresponding to the symbol has one of 2N signal levels. The driver circuit includes first, second and third driver sub-circuits, each driven by an input corresponding to one or more bits of the N-bit symbol, wherein the second and third driver sub-circuits are weighted, relative to the first driver sub-circuit, to reduce gds distortion in the signal.