公开(公告)号：US3593317A

公开(公告)日：1971-07-13

申请号：US3593317D

申请日：1969-12-30

Applicant: IBM

Inventor： FLEISHER HAROLD ,  WEINBERGER ARNOLD ,  WINKLER VAUGHN D

IPC: H03K19/177 ,  G06C15/00

CPC classification number: H03K19/177

Abstract: An improved method and means to implement a logic function F of N variables by partitioning the logic operation in a plurality of generalized logic matrices. It is first mathematically demonstrated that a function F of N variables may be expanded into subfunctions of a lesser number of variables. These subfunctions may be logically implemented individually and then logically combined so as to produce the desired function of N variables with a concomitant savings in logic circuitry over that required if the functions were directly implemented. The means used to implement the logic function F are a plurality of generalized logic matrices, each of which comprises a plurality of logic gates arranged in columns and rows, an input decoder for accepting the input variables, and a storage register for varying the functions generated at the output of the matrix. These matrices are arranged in cascade so that, as the function F is constructed from the several subfunctions, additional variables are inserted at each matrix stage until the function F of N variables is fully generated.

公开(公告)号：US3623016A

公开(公告)日：1971-11-23

申请号：US3623016D

申请日：1969-09-29

Applicant: IBM

Inventor： WINKLER VAUGHN D

IPC: G06F3/023 ,  G06K1/06 ,  H03K17/972 ,  H03M11/22 ,  H04L13/16 ,  G08B29/00 ,  H04L3/00

CPC classification number: H03K17/972 ,  G06F3/023

Abstract: Keyboard providing character coded information with each key depression is described. Information storage apparatus is included within the keyboard for storing one or more discrete character codes. By suitably controlling the access to the stored information, a plurality of multicharacter messages may be obtained with each key depression. The memory may be of the readwrite type permitting security control of the data transmitted between the keyboard of a terminal and the central processing unit of a computer. Provision is included in each key for providing an electronic interlock to permit operation in a burst mode.

公开(公告)号：US3202969A

公开(公告)日：1965-08-24

申请号：US86296759

申请日：1959-12-30

Applicant: IBM

Inventor： DUNWELL STEPHEN W ,  ERNEST STEPHENS CLARENCE ,  STRINGFELLOW WILLIAM R ,  WINKLER VAUGHN D

IPC: G06F9/38 ,  G06F15/16

CPC classification number: G06F9/3867 ,  G06F15/16