公开(公告)号：JP2002261618A

公开(公告)日：2002-09-13

申请号：JP2001396112

申请日：2001-12-27

Applicant: APPLE COMPUTER

Inventor： CORNELIUS WILLIAM P ,  ATHAS WILLIAM C

IPC: G06F5/00 ,  H03M7/02 ,  H03M13/23 ,  H03M13/41

Abstract: PROBLEM TO BE SOLVED: To provide a method and device for dispersing and concentrating information. SOLUTION: The device encodes data words by constant weight on a parallel data line bus while communicating the information between sub-word passes. A data transfer rate obtained only by differential architecture conventionally is achieved only by increasing a line count slightly more than single ended architecture. For instance, 22 encoded data lines are needed for transmitting 18 bit data words, and conventionally, 16 and 32 lines are needed for transmitting non-encoding data by the single ended architecture and the differential architecture respectively. According to the parallel encoding of the constant weight, a constant current is maintained in a parallel encoded data line and in a high potential and low potential driver circuit for a signal wire.