GB1076557A - Improvements in data transmission apparatus - Google Patents

Improvements in data transmission apparatus

Info

Publication number
GB1076557A
GB1076557A GB2016765A GB2016765A GB1076557A GB 1076557 A GB1076557 A GB 1076557A GB 2016765 A GB2016765 A GB 2016765A GB 2016765 A GB2016765 A GB 2016765A GB 1076557 A GB1076557 A GB 1076557A
Authority
GB
United Kingdom
Prior art keywords
blocks
data
data transmission
bit
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2016765A
Inventor
Etienne Gorog
Michael Melas
Jean Lemiere
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR7451A external-priority patent/FR86907E/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1076557A publication Critical patent/GB1076557A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
    • H04L7/0066—Detection of the synchronisation error by features other than the received signal transition detection of error based on transmission code rule
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/06—Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel or plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/38—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of turbine type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
    • H04L25/4919—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes using balanced multilevel codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Dc Digital Transmission (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

1,076,557. Data transmission. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 13, 1965 [May 13, 1964], No. 20167/65. Heading H4P. In a data transmission system equal-length blocks of data are recoded into blocks of like length, each recoded block having one half of it the inverse of the other half, and all blocks having the same fundamental frequency. Four-bit blocks a, b, c, d, Fig. 6 (not shown), are used in the embodiment described, and are converted to four-level four-bit length blocks +A, +B, -A, -B, the conversion being A = 2a+b, B = 2c+d, where a . . . d are + 1v for binary 1 and - 1v for binary 0. The receiver includes means, not described, for recoding the four-level data to the original binary form, and also means for synchronizing sampling means which operates during only two of the four bit-periods in a received block. It is a characteristic of the received data that the signal level has values only of Œ3nV or Œ1nV, and has no D.C. component. Synchronization may be by way of the data itself or by use of a periodic sync. signal. The circuits for both systems are described.
GB2016765A 1964-05-13 1965-05-13 Improvements in data transmission apparatus Expired GB1076557A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR06007388A FR1404648A (en) 1964-05-13 1964-05-13 Data transmission method and device performing this transmission
FR7451A FR86907E (en) 1964-08-24 1964-08-24 Data transmission method and device performing this transmission

Publications (1)

Publication Number Publication Date
GB1076557A true GB1076557A (en) 1967-07-19

Family

ID=42199289

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2016765A Expired GB1076557A (en) 1964-05-13 1965-05-13 Improvements in data transmission apparatus

Country Status (3)

Country Link
FR (1) FR1404648A (en)
GB (1) GB1076557A (en)
NL (1) NL145426B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143096A (en) * 1983-07-06 1985-01-30 Motorola Israel Ltd Clock recovery circuit
WO1990015494A1 (en) * 1989-06-03 1990-12-13 H.&C. Elektronik Gmbh Process for analog transmission or storage of digital data

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1504609A (en) * 1966-09-21 1967-12-08 Ibm France Data transmission system
FR1511158A (en) * 1966-12-08 1968-01-26 Cie I B M France Data receiving system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143096A (en) * 1983-07-06 1985-01-30 Motorola Israel Ltd Clock recovery circuit
WO1990015494A1 (en) * 1989-06-03 1990-12-13 H.&C. Elektronik Gmbh Process for analog transmission or storage of digital data

Also Published As

Publication number Publication date
FR1404648A (en) 1965-07-02
NL145426B (en) 1975-03-17
NL6506144A (en) 1965-11-15

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