CH275992A - Method for transmitting low frequency signals and installation for implementing this method. - Google Patents

Method for transmitting low frequency signals and installation for implementing this method.

Info

Publication number
CH275992A
CH275992A CH275992DA CH275992A CH 275992 A CH275992 A CH 275992A CH 275992D A CH275992D A CH 275992DA CH 275992 A CH275992 A CH 275992A
Authority
CH
Switzerland
Prior art keywords
implementing
installation
low frequency
frequency signals
transmitting low
Prior art date
Application number
Other languages
French (fr)
Inventor
Incorporated Western E Company
Original Assignee
Western Electric Co
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
Application filed by Western Electric Co filed Critical Western Electric Co
Publication of CH275992A publication Critical patent/CH275992A/en

Links

Classifications

    • 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
    • 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
    • H03M1/50—Analogue/digital converters with intermediate conversion to time interval
    • H03M1/56—Input signal compared with linear ramp
    • 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
    • H03M1/60—Analogue/digital converters with intermediate conversion to frequency of pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radar Systems Or Details Thereof (AREA)
CH275992D 1944-09-16 1947-05-20 Method for transmitting low frequency signals and installation for implementing this method. CH275992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US554495A US2449467A (en) 1944-09-16 1944-09-16 Communication system employing pulse code modulation

Publications (1)

Publication Number Publication Date
CH275992A true CH275992A (en) 1951-06-15

Family

ID=24213574

Family Applications (1)

Application Number Title Priority Date Filing Date
CH275992D CH275992A (en) 1944-09-16 1947-05-20 Method for transmitting low frequency signals and installation for implementing this method.

Country Status (5)

Country Link
US (1) US2449467A (en)
BE (1) BE472941A (en)
CH (1) CH275992A (en)
ES (1) ES178391A1 (en)
FR (1) FR946257A (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB682648A (en) * 1936-10-11 1952-11-12 Gaston Xavier Noeel Potier Improvements in or relating to a method and device for multiplex transmission by means of time modulated pulses
US3912868A (en) * 1943-07-17 1975-10-14 Bell Telephone Labor Inc Telephone privacy system
US3944745A (en) * 1945-05-10 1976-03-16 Bell Telephone Laboratories, Incorporated Secret signaling system with means for preventing key disclosure
US2724183A (en) * 1945-12-27 1955-11-22 Calibron Products Inc Remotely controlled precision drive and calculating systems
US2801281A (en) * 1946-02-21 1957-07-30 Bell Telephone Labor Inc Communication system employing pulse code modulation
US2651716A (en) * 1947-11-08 1953-09-08 Int Standard Electric Corp Pulse code modulation demodulator
GB680702A (en) * 1947-12-07 1952-10-08 Standard Telephones Cables Ltd Mixed modulation in pulsed intercommunication systems
GB644932A (en) * 1948-01-16 1950-10-18 Standard Telephones Cables Ltd Improvements in or relating to signal compression and expansion arrangements in electric communication systems
GB646050A (en) * 1948-02-20 1950-11-15 Standard Telephones Cables Ltd Improvements in or relating to electric pulse code modulation systems of communication
GB664401A (en) * 1948-03-25 1952-01-09 Nat Res Dev Improvements in thermionic valve circuits
US2619632A (en) * 1948-04-23 1952-11-25 Stromberg Carlson Co Pulse communication system
US2592308A (en) * 1948-09-01 1952-04-08 Bell Telephone Labor Inc Nonlinear pulse code modulation system
US2603714A (en) * 1948-09-01 1952-07-15 Bell Telephone Labor Inc Percentage time division multiplex for pulse code modulation
US2700068A (en) * 1948-11-16 1955-01-18 Muller Egon Nicolas Pulse multiplex system
BE492403A (en) * 1948-11-26
NL106021C (en) * 1948-12-24
US2725425A (en) * 1949-10-01 1955-11-29 Rca Corp System for transmitting intelligence at reduced bandwidth
IT500026A (en) * 1950-05-17
BE504158A (en) * 1950-05-17
US2605361A (en) * 1950-06-29 1952-07-29 Bell Telephone Labor Inc Differential quantization of communication signals
BE505568A (en) * 1950-09-01
US2759998A (en) * 1951-10-26 1956-08-21 Itt Pulse communication system
US2950348A (en) * 1954-08-03 1960-08-23 Philco Corp Combined encoder and decoder system
NL100417C (en) * 1955-03-11 1900-01-01
US2783455A (en) * 1955-07-05 1957-02-26 Paul Grimm Self synchronous delay line
US2949505A (en) * 1957-08-14 1960-08-16 Bell Telephone Labor Inc Reduced bandwith transmission system
US3244989A (en) * 1963-08-13 1966-04-05 Hewlett Packard Co Oscilloscope sweep circuits
US3886313A (en) * 1972-09-29 1975-05-27 Datotek Voice security method and system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1461783A (en) * 1919-12-27 1923-07-17 American Telephone & Telegraph Secret-communication system
US1561227A (en) * 1923-03-31 1925-11-10 Western Electric Co Carrier-current signaling system
US1709901A (en) * 1925-10-08 1929-04-23 American Telephone & Telegraph Secret-signaling system
US1757181A (en) * 1928-12-04 1930-05-06 American Telephone & Telegraph Privacy system for telephone transmission
NL88393C (en) * 1937-06-18
US2262838A (en) * 1937-11-19 1941-11-18 Int Standard Electric Corp Electric signaling system
NL87334C (en) * 1938-10-03
US2313209A (en) * 1938-11-08 1943-03-09 Valensi Georges Communication system
US2277000A (en) * 1940-09-17 1942-03-17 Philco Radio & Television Corp Synchronizing system
US2413023A (en) * 1944-01-06 1946-12-24 Standard Telephones Cables Ltd Demodulator

Also Published As

Publication number Publication date
US2449467A (en) 1948-09-14
FR946257A (en) 1949-05-30
ES178391A1 (en) 1947-08-01
BE472941A (en) 1900-01-01

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