公开(公告)号：CA981586A

公开(公告)日：1976-01-13

申请号：CA173853

申请日：1973-06-12

Applicant: IBM

Inventor： DAVIS ROBERT H ,  FOX JON E

IPC: G06F3/02 ,  H03K17/98 ,  H03M11/02 ,  H03M11/18

Abstract: A digital encoding keyboard apparatus based on the use of a series of switches arrayed in a matrix configuration is disclosed, together with circuitry for scanning, detecting, shifting, preventing multiple detection, and encoding an output.

公开(公告)号：CS210653B2

公开(公告)日：1982-01-29

申请号：CS415875

申请日：1975-06-12

Applicant: IBM

Inventor： FOX JON E

IPC: H05K1/02 ,  G06F3/044 ,  H01G4/06 ,  H03K17/98 ,  H05K1/00 ,  H05K1/14 ,  H05K1/16 ,  H05K3/46 ,  H05K13/00

Abstract: Apparatus for use with capacitively coupled keyboard devices is described in which an improved circuitboard which eliminates the necessity of through-plated holes is claimed. At least one flexible dielectric substrate, and one substrate which may be flexible or rigid, are both provided with printed or etched circuit patterns and are used in a sandwich construction with insulative material between them. Pairs of capacitively couplable circuit pads result from this construction and one of the pads in each pair has a capacitively coupled output.

公开(公告)号：CA2091084A1

公开(公告)日：1993-09-11

申请号：CA2091084

申请日：1993-03-05

Applicant: IBM

Inventor： ABENSOUR DANIEL ,  FOX JON E ,  JOSHI MAHENDRA J ,  LAI FU-YUNG Y ,  SY KIAN-BON K

IPC: H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L29/10 ,  H04Q11/04 ,  H04J3/22 ,  H04J3/26

Abstract: A terminal adapter interfaces between a Data Terminating Equipment (DTE) and either a Frame Relay (FR) or a Switched Multimegabit Data Service (SMDS) telecommunications network so that the type of network over which the DTE is communicating is transparent to the DTE. The TA performs mapping from one protocol to another so that a native FR DTE can access an SMDS network and so that a native SMDS DTE can access a FR network. The address mapping method performed by the TA uses a parallel table look-up technique which reduces the chance of collision (when two or more addresses hash into the same table entry), eliminates the traditional comparison function to detect a collision, and eliminates the traditional pointer technique when a collision occurs.

公开(公告)号：CA991996A

公开(公告)日：1976-06-29

申请号：CA235131

申请日：1975-09-05

Applicant: IBM

Inventor： DAVIS ROBERT H ,  FOX JON E

IPC: G06F3/02 ,  H03K17/98 ,  H03M11/02 ,  H03M11/18

Abstract: A digital encoding keyboard apparatus based on the use of a series of switches arrayed in a matrix configuration is disclosed, together with circuitry for scanning, detecting, shifting, preventing multiple detection, and encoding an output.

公开(公告)号：DE69334011D1

公开(公告)日：2006-05-24

申请号：DE69334011

申请日：1993-02-23

Applicant: IBM

Inventor： ABENSOUR DANIEL SIMON ,  FOX JON E ,  JOSHI MEHENDRA JAYANTILAL ,  LAI FUYUNG ,  SY KIAN-BON K

IPC: H04Q11/04 ,  G06F12/02 ,  G06F12/10 ,  H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L29/10 ,  H04L29/12

Abstract: A terminal adapter interfaces between a Data Terminating Equipment (DTE) and either a Frame Relay (FR) or a Switched Multimegabit Data Service (SMDS) telecommunications network so that the type of network over which the DTE is communicating is transparent to the DTE. The TA performs mapping from one protocol to another so that a native FR DTE can access an SMDS network and so that a native SMDS DTE can access a FR network. The address mapping method performed by the TA uses a parallel table look-up technique which reduces the chance of collision (when two or more addresses hash into the same table entry), eliminates the traditional comparison function to detect a collision, and eliminates the traditional pointer technique when a collision occurs.

公开(公告)号：CA2091084C

公开(公告)日：1998-05-12

申请号：CA2091084

申请日：1993-03-05

Applicant: IBM

Inventor： LAI FU-YUNG Y ,  ABENSOUR DANIEL ,  FOX JON E ,  SY KIAN-BON K ,  JOSHI MAHENDRA J

IPC: H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L29/10 ,  H04Q11/04 ,  H04J3/22 ,  H04J3/26

Abstract: A terminal adapter interfaces between a Data Terminating Equipment (DTE) and either a Frame Relay (FR) or a Switched Multimegabit Data Service (SMDS) telecommunications network so that the type of network over which the DTE is communicating is transparent to the DTE. The TA performs mapping from one protocol to another so that a native FR DTE can access an SMDS network and so that a native SMDS DTE can access a FR network. The address mapping method performed by the TA uses a parallel table look-up technique which reduces the chance of collision (when two or more addresses hash into the same table entry), eliminates the traditional comparison function to detect a collision, and eliminates the traditional pointer technique when a collision occurs.

公开(公告)号：DE69334011T2

公开(公告)日：2006-10-12

申请号：DE69334011

申请日：1993-02-23

Applicant: IBM

Inventor： ABENSOUR DANIEL SIMON ,  FOX JON E ,  JOSHI MEHENDRA JAYANTILAL ,  LAI FUYUNG

IPC: H04Q11/04 ,  G06F12/02 ,  G06F12/10 ,  H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L29/10 ,  H04L29/12

Abstract: A terminal adapter interfaces between a Data Terminating Equipment (DTE) and either a Frame Relay (FR) or a Switched Multimegabit Data Service (SMDS) telecommunications network so that the type of network over which the DTE is communicating is transparent to the DTE. The TA performs mapping from one protocol to another so that a native FR DTE can access an SMDS network and so that a native SMDS DTE can access a FR network. The address mapping method performed by the TA uses a parallel table look-up technique which reduces the chance of collision (when two or more addresses hash into the same table entry), eliminates the traditional comparison function to detect a collision, and eliminates the traditional pointer technique when a collision occurs.

公开(公告)号：CA1147868A

公开(公告)日：1983-06-07

申请号：CA352829

申请日：1980-05-27

Applicant: IBM

Inventor： DAHL JEROME P ,  EPLEY PHILLIP R ,  FOX JON E

IPC: G06F3/02 ,  G06F3/023 ,  H03K17/96 ,  H03K17/98 ,  H03M11/20

Abstract: PROGRAM CONTROLLED CAPACITIVE KEYBOARD SENSING SYSTEM An improved sensing apparatus for detecting impedance changes in a variable impedance matrix keyboard is described. A microprocessor is utilized to control the basic key intersections scanning and for accurately calibrating and adjusting the sensing threshold of the sense amplifier prior to testing each key intersection so that the effects of stray impedance and varying voltage levels may be compensated for.

公开(公告)号：CA1030662A

公开(公告)日：1978-05-02

申请号：CA225800

申请日：1975-04-23

Applicant: IBM

Inventor： FOX JON E

IPC: H05K1/02 ,  G06F3/044 ,  H01G4/06 ,  H03K17/98 ,  H05K1/00 ,  H05K1/14 ,  H05K1/16 ,  H05K3/46

Abstract: Apparatus for use with capacitively coupled keyboard devices is described in which an improved circuitboard which eliminates the necessity of through-plated holes is claimed. At least one flexible dielectric substrate, and one substrate which may be flexible or rigid, are both provided with printed or etched circuit patterns and are used in a sandwich construction with insulative material between them. Pairs of capacitively couplable circuit pads result from this construction and one of the pads in each pair has a capacitively coupled output.

公开(公告)号：CA994920A

公开(公告)日：1976-08-10

申请号：CA235132

申请日：1975-09-05

Applicant: IBM

Inventor： DAVIS ROBERT H ,  FOX JON E

IPC: G06F3/02 ,  H03K17/98 ,  H03M11/02 ,  H03M11/18

Abstract: A digital encoding keyboard apparatus based on the use of a series of switches arrayed in a matrix configuration is disclosed, together with circuitry for scanning, detecting, shifting, preventing multiple detection, and encoding an output.