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GB1026806A - Receiving apparatus and frequency shift keying systems for the utilisation thereof - Google Patents

Receiving apparatus and frequency shift keying systems for the utilisation thereof

Info

Publication number
GB1026806A
GB1026806A GB4319062A GB4319062A GB1026806A GB 1026806 A GB1026806 A GB 1026806A GB 4319062 A GB4319062 A GB 4319062A GB 4319062 A GB4319062 A GB 4319062A GB 1026806 A GB1026806 A GB 1026806A
Authority
GB
United Kingdom
Prior art keywords
pulse trains
fed
gate
combined
circuits
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
GB4319062A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 US89831A external-priority patent/US3165583A/en
Priority claimed from US155861A external-priority patent/US3142723A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1026806A publication Critical patent/GB1026806A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
    • C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
    • C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying

Landscapes

  • Chemical & Material Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Engineering & Computer Science (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Signal Processing (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Dc Digital Transmission (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1,026,806. Data transmission. WESTERN ELECTRIC CO. INCORPORATED. Nov. 15, 1962 [Nov. 29, 1961], No. 43190/62. Heading H4P. In a frequency-shift keying data transmission system mark and space bits gate one or the other, respectively, of two synchronous pulse trains which are so related that their difference frequency is an integral multiple of the bit frequency. At the receiver two further pulse trains are derived from the received signals, these trains corresponding to the first pulse trains. Both further pulse trains are fed to individual EXCLUSIVE OR circuits to which are also fed the received signals. The output of one of these OR circuits is inverted and combined with the output from the other circuit to reproduce the data signals. At the transmitter data signals S, Fig. 1 (not shown), pass direct to gate 14, and via an inverter to gate 15. These gates are also fed with pulse trains A, B, respectively; their outputs are combined and sent to the receiver. The received signal is passed to timing circuits, which comprise filters, amplifiers and clippers, to provide pulse trains A<SP>1</SP>, B<SP>1</SP>, corresponding to A, B at the transmitter. After clipping, the signal forms an input to both EXCLUSIVE OR gates 28, 29, which are also fed with A<SP>1</SP>, B<SP>1</SP> respectively. Their outputs C, E are combined, after inverting one of them, to provide waveform F, which corresponds to the original data.
GB4319062A 1960-11-21 1962-11-15 Receiving apparatus and frequency shift keying systems for the utilisation thereof Expired GB1026806A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US7041960A 1960-11-21 1960-11-21
US89831A US3165583A (en) 1960-11-21 1961-02-16 Two-tone transmission system for digital data
US155861A US3142723A (en) 1961-11-29 1961-11-29 Frequency shift keying system
US24292562A 1962-12-07 1962-12-07

Publications (1)

Publication Number Publication Date
GB1026806A true GB1026806A (en) 1966-04-20

Family

ID=27490825

Family Applications (4)

Application Number Title Priority Date Filing Date
GB3801561A Expired GB923840A (en) 1960-11-21 1961-10-24 Polymerization of diene polymers
GB278862A Expired GB923955A (en) 1960-11-21 1962-01-25 Improvements in or relating to digital information transfer systems
GB4319062A Expired GB1026806A (en) 1960-11-21 1962-11-15 Receiving apparatus and frequency shift keying systems for the utilisation thereof
GB4558863A Expired GB993485A (en) 1960-11-21 1963-11-19 Conjugated diene polymers

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB3801561A Expired GB923840A (en) 1960-11-21 1961-10-24 Polymerization of diene polymers
GB278862A Expired GB923955A (en) 1960-11-21 1962-01-25 Improvements in or relating to digital information transfer systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB4558863A Expired GB993485A (en) 1960-11-21 1963-11-19 Conjugated diene polymers

Country Status (5)

Country Link
BE (1) BE625435A (en)
DE (2) DE1217997B (en)
GB (4) GB923840A (en)
NL (2) NL285920A (en)
SE (1) SE307383B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63180294A (en) * 1987-01-22 1988-07-25 Man Design Kk Measurement data source

Also Published As

Publication number Publication date
BE625435A (en) 1963-03-15
NL274439A (en)
SE307383B (en) 1969-01-07
DE1226142B (en) 1966-10-06
GB923955A (en) 1963-04-18
GB923840A (en) 1963-04-18
DE1217997B (en) 1966-06-02
NL285920A (en) 1965-02-10
GB993485A (en) 1965-05-26

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