BE570041A - Spreekfrequente ontvanger - Google Patents

Spreekfrequente ontvanger

Info

Publication number
BE570041A
BE570041A BE570041A BE570041A BE570041A BE 570041 A BE570041 A BE 570041A BE 570041 A BE570041 A BE 570041A BE 570041 A BE570041 A BE 570041A BE 570041 A BE570041 A BE 570041A
Authority
BE
Belgium
Prior art keywords
circuit
voltage
limiter
frequency
feedback
Prior art date
Application number
BE570041A
Other languages
English (en)
Dutch (nl)
Original Assignee
Bell Telphone Manf Co 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
Priority claimed from NL160821A external-priority patent/NL81147C/nl
Application filed by Bell Telphone Manf Co Nv filed Critical Bell Telphone Manf Co Nv
Publication of BE570041A publication Critical patent/BE570041A/nl

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
    • H04Q1/446—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
    • 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
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
    • 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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Amplifiers (AREA)
  • Interface Circuits In Exchanges (AREA)
BE570041A 1951-04-27 1958-08-04 Spreekfrequente ontvanger BE570041A (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL160821A NL81147C (nl) 1951-04-27 1951-04-27 Ontvangstinrichting voor toonfrequentiesignalen
NL219653A NL93729C (nl) 1951-04-27 1957-08-06 Ontvanginrichting voor toonfrequentiesignalen

Publications (1)

Publication Number Publication Date
BE570041A true BE570041A (nl) 1961-07-28

Family

ID=26641579

Family Applications (1)

Application Number Title Priority Date Filing Date
BE570041A BE570041A (nl) 1951-04-27 1958-08-04 Spreekfrequente ontvanger

Country Status (5)

Country Link
BE (1) BE570041A (fr)
DE (1) DE1046116B (fr)
FR (1) FR75213E (fr)
GB (1) GB831713A (fr)
NL (1) NL93729C (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103558A (en) * 1959-09-24 1963-09-10 Int Standard Electric Corp ligotky

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745228C (de) * 1939-07-28 1944-03-01 Siemens Ag Elektrischer Signalempfaenger
DE856164C (de) * 1943-10-29 1952-11-20 Siemens Ag Elektrischer Signalempfaenger
DE899373C (de) * 1952-04-22 1953-12-10 Telefonbau & Normalzeit Gmbh Schaltungsanordnung zur Forttschaltung von den Teilnehmerleitungen zugeordneten Gebuehrenanzeigern
DE1013708B (de) 1955-12-22 1957-08-14 Siemens Ag Schaltungsanordnung zum Empfang von Signalspannungen

Also Published As

Publication number Publication date
NL93729C (nl) 1960-02-16
GB831713A (en) 1960-03-30
DE1046116B (de) 1958-12-11
FR75213E (fr) 1961-05-12

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