公开(公告)号：US3069506A

公开(公告)日：1962-12-18

申请号：US68198957

申请日：1957-09-04

Applicant: IBM

Inventor： EMIL HOPNER ,  ANDREWS MAXWELL C

IPC: H04B1/66

CPC classification number: H04B1/66

公开(公告)号：US2979566A

公开(公告)日：1961-04-11

申请号：US71597658

申请日：1958-02-18

Applicant: IBM

Inventor： EMIL HOPNER ,  MARKEY HAROLD G

IPC: H04L27/20 ,  H04L27/227

CPC classification number: H04L27/2275 ,  H04L27/2035

公开(公告)号：CH411037A

公开(公告)日：1966-04-15

申请号：CH1072162

申请日：1962-09-10

Applicant: IBM

Inventor： EMIL HOPNER

IPC: G11B20/14

公开(公告)号：CH410049A

公开(公告)日：1966-03-31

申请号：CH870764

申请日：1964-07-02

Applicant: IBM

Inventor： EMIL HOPNER ,  DALE HOLMES RUMBLE

IPC: H04L25/48 ,  H04L25/49 ,  H04N1/00

公开(公告)号：CH416726A

公开(公告)日：1963-12-13

申请号：CH1531463

申请日：1963-12-13

Applicant: IBM

Inventor： EMIL HOPNER ,  ROBERT HEATH DENNARD ,  DALE LEVERNE CRITCHLOW

IPC: H04L7/04 ,  H04L7/08 ,  H04L27/02

公开(公告)号：DE1286536B

公开(公告)日：1969-01-09

申请号：DEI0026139

申请日：1964-07-02

Applicant: IBM

Inventor： EMIL HOPNER ,  HOLMES RUMBLE DALE

IPC: H04L25/48 ,  H04L25/49 ,  H04N1/00

Abstract: 1,002,744. Telegraphy. INTERNATIONAL BUSINESS MACHINES CORPORATION. June 19, 1964 [July 3, 1963], No. 25384/64. Heading H4P. In a data transmission system adjacent 1 bits are transmitted as pulses which have different polarity, and each such pulse is followed by an additional pulse having the opposite polarity. At the transmitter, data A is converted to the form B by passing it to a toggle, and, by differentiation, waveform C is Obtainedadjacent pulses represent adjacent 1 bits and have opposite polarity. By delaying this waveform as at D and adding it to the inverted waveform C, i.e. to E, a resultant waveform F is derived, which has the characteristics referred to above. The signal on the transmission channel is as G. The receiver includes a logic arrangement for operating an output toggle which gives a waveform similar to that at B. The logic is such that the output toggle is connected to the receiver only when 1 bits are being received.

公开(公告)号：CH405420A

公开(公告)日：1966-01-15

申请号：CH1561463

申请日：1963-12-18

Applicant: IBM

Inventor： EMIL HOPNER ,  HANS RICHARD ULANDER

IPC: G06F1/02 ,  H03K5/01 ,  H04L25/03 ,  H04L25/48