GB663872A - Improvements in or relating to electric pulse signalling systems - Google Patents

Improvements in or relating to electric pulse signalling systems

Info

Publication number
GB663872A
GB663872A GB29092/48A GB2909248A GB663872A GB 663872 A GB663872 A GB 663872A GB 29092/48 A GB29092/48 A GB 29092/48A GB 2909248 A GB2909248 A GB 2909248A GB 663872 A GB663872 A GB 663872A
Authority
GB
United Kingdom
Prior art keywords
code
cathode
group
wave
nov
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
GB29092/48A
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 US715900A external-priority patent/US2458652A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB663872A publication Critical patent/GB663872A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/02—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
    • H01J31/04—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused with only one or two output electrodes with only two electrically independant groups or electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/044—Sample and hold circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/14—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Measurement Of Radiation (AREA)
  • Particle Accelerators (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Details Of Television Scanning (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

663,872. Cathode-ray tubes. WESTERN ELECTRIC CO., Inc. Nov. 9, 1948 [Nov. 13, 1947], No. 29092/48. Class 39 (i). [Also in Group XL (c)] In a pulse code modulation transmitter (see Group XL (c)), a signal is converted into sevenunit code groups by a cathode-ray tube as described in Specification 637,820. The mask apertures are arranged as shown in Fig. 2 to produce pulse groups in which the code for each number differs from the code for its adjacent numbers in only one digit, but other arrangements are stated to be possible, which fall within the specified code requirements. In one receiver, Fig. 4, each of a pair of translator circuits comprises a condenser 70, 701 upon which a stepped voltage wave is developed and a cathode-ray tube 74, 74<SP>1</SP>, respectively. The group A of positive pulses is inverted by amplifier 72 and fed through rectifier 71 to the condener 70 where the negatively rising wave B is developed. This wave is applied to deflecting plates 73 of the tube 74 and moves the beam 77 so that it strikes the mask 78 on alternate steps but passes through a slot to strike the target 76 on the remaining steps. Specifications 663,837 and 663,838 also are referred to.
GB29092/48A 1946-03-22 1948-11-09 Improvements in or relating to electric pulse signalling systems Expired GB663872A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US637820XA 1946-03-22 1946-03-22
US715900A US2458652A (en) 1946-12-13 1946-12-13 Electron discharge apparatus
US663872XA 1947-11-13 1947-11-13

Publications (1)

Publication Number Publication Date
GB663872A true GB663872A (en) 1951-12-27

Family

ID=27370526

Family Applications (4)

Application Number Title Priority Date Filing Date
GB22025/47A Expired GB637820A (en) 1946-03-22 1947-08-08 Pulse code signalling systems
GB32803/47A Expired GB663837A (en) 1946-03-22 1947-12-12 Improvements in or relating to electron discharge apparatus
GB32804/47A Expired GB663838A (en) 1946-03-22 1947-12-12 Improvements in or relating to electron discharge apparatus
GB29092/48A Expired GB663872A (en) 1946-03-22 1948-11-09 Improvements in or relating to electric pulse signalling systems

Family Applications Before (3)

Application Number Title Priority Date Filing Date
GB22025/47A Expired GB637820A (en) 1946-03-22 1947-08-08 Pulse code signalling systems
GB32803/47A Expired GB663837A (en) 1946-03-22 1947-12-12 Improvements in or relating to electron discharge apparatus
GB32804/47A Expired GB663838A (en) 1946-03-22 1947-12-12 Improvements in or relating to electron discharge apparatus

Country Status (5)

Country Link
BE (4) BE485738A (en)
DE (2) DE809222C (en)
FR (4) FR953466A (en)
GB (4) GB637820A (en)
NL (2) NL79798C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE958204C (en) * 1952-08-22 1957-02-14 Siemens Ag Device for converting amplitude-modulated pulses into code-modulated pulses

Also Published As

Publication number Publication date
NL79798C (en)
FR953466A (en) 1949-12-07
BE477109A (en)
GB663838A (en) 1951-12-27
BE477959A (en)
BE476835A (en)
GB663837A (en) 1951-12-27
DE838324C (en) 1952-05-08
BE485738A (en)
FR59521E (en) 1954-06-28
GB637820A (en) 1950-05-24
DE809222C (en) 1951-07-26
FR957139A (en) 1950-02-16
NL74850C (en)
FR957199A (en) 1950-02-16

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