公开(公告)号：JPH11316737A

公开(公告)日：1999-11-16

申请号：JP2404499

申请日：1999-02-01

Applicant: IBM

Inventor： BEERS GREGORY E ,  FRANKENY RICHARD F ,  MIZUKARU MODDO SUMADI

IPC: G06F13/36 ,  G06F13/40 ,  H03M5/16

Abstract: PROBLEM TO BE SOLVED: To use data with parallel data buses of defined width together with a circuit which transmits and receives by providing plural inputs which receive a 1st set of parallel data and >=1 outputs which transmit a 2nd set of parallel data signals, making the 2nd set smaller than the 1st set and making the 2nd set include a width reduction circuit element that represents information included in the 1st set. SOLUTION: A processing circuit element 100 sends its output to a width reduction circuit element 102 through processing element/width reduction input lines 104. The element 102 receives N×M (N is an integer of >=1 and M is an integer of >=2) pieces of the lines 104 as inputs and encodes information included in N×M pieces of the lines 104 into N pieces of output lines 106. N pieces of the lines 106 are connected to a parallel connector 108 which is adapted so as to be easily connected to a parallel data bus 110 consisting of N pieces of data bus lines 112. Thus, the transmission speed of the bus 110 is equivalently accelerated to M times.

公开(公告)号：PL181152B1

公开(公告)日：2001-06-29

申请号：PL32132496

申请日：1996-01-19

Applicant: IBM

Inventor： BEERS GREGORY E ,  FRANKENY RICHARD F ,  SMADI MITHKAL M

IPC: G06F3/00 ,  H04L5/14 ,  H04L25/02 ,  H03K19/00 ,  H04B3/02

Abstract: A method and apparatus are disclosed for sending and receiving logic signals. A driver is connected to a first end of a transmission line with a predetermined impedance and first and second transmission line ends for communicating the logic signals. The driver has a source for sending the logic signals, and a reference generator connected to the source for setting the magnitude of the signals sent by the source. A receiver is connected to the second transmission line end, and has a transmission line terminator for sinking the signals, and a reference generator connected to the terminator for setting a bias of the terminator to establish a certain family of terminator impedances for sinking the signals. The driver reference generator and the receiver reference generator interactively match the terminator impedance to the transmission line for the set magnitude of the signals.