公开(公告)号：DE2428040A1

公开(公告)日：1975-01-09

申请号：DE2428040

申请日：1974-06-11

Applicant: IBM

Inventor： HONG SE JUNE ,  OSTAPKO DANIEL LAWRENCE

IPC: H03M7/40 ,  G11B20/14 ,  H04L25/48 ,  H04L25/49 ,  H03K13/00

Abstract: The encoding circuits of this invention provide signals for representing binary data in a storage medium or in a transmission system as a waveform that has a small constrained value of accumulated difference between its positive and negative portions. The waveform has minimum and maximum run lengths between transitions between positive and negative values so that it provides both high density and good clocking. Several new codes are described which can be implemented with fewer logic and storage components than prior codes of this general type.

公开(公告)号：DE3483181D1

公开(公告)日：1990-10-18

申请号：DE3483181

申请日：1984-05-21

Applicant: IBM

Inventor： OSTAPKO DANIEL LAWRENCE

IPC: G09G5/00 ,  G06F12/00 ,  G06F12/02 ,  G06F12/06 ,  G11C8/00 ,  G06F13/00

Abstract: The memory system writes both horizontal and vertical lines into a two-dimensional array by a mapping process for storing the array in 64K memory chips, with required data transformations, address calculations, and chip hardware. The mapping and hardware provide bit addressability in both horizontal and vertical directions.

公开(公告)号：DE2333046A1

公开(公告)日：1974-01-10

申请号：DE2333046

申请日：1973-06-29

Applicant: IBM

Inventor： HONG SE JUNE ,  JONES DARRYL STANLEY ,  OSTAPKO DANIEL LAWRENCE

IPC: G06F11/22 ,  G01R31/3183 ,  G06F11/16 ,  H03K19/003 ,  H03K13/32