CH265981A - Receiving circuitry for low frequency or carrier power telephone systems. - Google Patents

Receiving circuitry for low frequency or carrier power telephone systems.

Info

Publication number
CH265981A
CH265981A CH265981DA CH265981A CH 265981 A CH265981 A CH 265981A CH 265981D A CH265981D A CH 265981DA CH 265981 A CH265981 A CH 265981A
Authority
CH
Switzerland
Prior art keywords
low frequency
telephone systems
carrier power
receiving circuitry
power telephone
Prior art date
Application number
Other languages
German (de)
Inventor
Gloeilampenfabrieken N Philips
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of CH265981A publication Critical patent/CH265981A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/14—Arrangements providing for calling or supervisory signals
    • 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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
CH265981D 1947-02-21 1948-02-19 Receiving circuitry for low frequency or carrier power telephone systems. CH265981A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL130519 1947-02-21

Publications (1)

Publication Number Publication Date
CH265981A true CH265981A (en) 1949-12-31

Family

ID=19750410

Family Applications (1)

Application Number Title Priority Date Filing Date
CH265981D CH265981A (en) 1947-02-21 1948-02-19 Receiving circuitry for low frequency or carrier power telephone systems.

Country Status (6)

Country Link
US (1) US2496784A (en)
CH (1) CH265981A (en)
DE (1) DE841924C (en)
FR (2) FR961481A (en)
GB (1) GB656189A (en)
NL (1) NL69785C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE939820C (en) * 1952-05-06 1956-03-01 Siemens Ag Circuit arrangement for receiving voltages of one or more signal frequencies

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL80217C (en) * 1950-06-15
DE931711C (en) * 1950-08-27 1955-08-16 Lorenz C Ag Receiver for alternating current pulses
DE973493C (en) * 1950-09-28 1960-03-10 Philips Nv Single sideband carrier frequency telephone system
NL92529C (en) * 1952-04-09
FI104995B (en) 1999-01-28 2000-05-15 Halton Oy Control structure of valve for controlling gaseous media such as airflow

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL39470B (en) * 1927-01-04
US2018464A (en) * 1930-06-07 1935-10-22 Bell Telephone Labor Inc Voice operated transmission circuit
FR812623A (en) * 1936-01-16 1937-05-13 Applic Telephoniques Soc D Device for reception and retransmission of signals over long distance telephone lines
US2145053A (en) * 1936-11-18 1939-01-24 Bell Telephone Labor Inc Signaling system
US2199179A (en) * 1936-11-27 1940-04-30 Rca Corp Single channel two-way communication system
US2251958A (en) * 1937-01-29 1941-08-12 Hartford Nat Bank & Trust Co Telephony
US2164185A (en) * 1937-05-22 1939-06-27 Great Lakes Pipe Line Company Voice operated repeater
GB495162A (en) * 1938-02-22 1938-11-08 Arthur Reginald Albert Rendall Improvements in and relating to alternating current signalling systems
BE434364A (en) * 1938-05-16
BE464853A (en) * 1939-08-14
US2366011A (en) * 1941-07-23 1944-12-26 Kellogg Switchboard & Supply Two-way amplifier
US2319306A (en) * 1941-10-31 1943-05-18 Bell Telephone Labor Inc Signaling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE939820C (en) * 1952-05-06 1956-03-01 Siemens Ag Circuit arrangement for receiving voltages of one or more signal frequencies

Also Published As

Publication number Publication date
US2496784A (en) 1950-02-07
NL69785C (en)
FR963277A (en) 1950-07-05
DE841924C (en) 1952-06-19
GB656189A (en) 1951-08-15
FR961481A (en) 1950-05-12

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