SE388100B - Anordning for detektering av en tonsignal med bestemd frekvens - Google Patents

Anordning for detektering av en tonsignal med bestemd frekvens

Info

Publication number
SE388100B
SE388100B SE7511126A SE7511126A SE388100B SE 388100 B SE388100 B SE 388100B SE 7511126 A SE7511126 A SE 7511126A SE 7511126 A SE7511126 A SE 7511126A SE 388100 B SE388100 B SE 388100B
Authority
SE
Sweden
Prior art keywords
detecting
tone signal
determined frequency
frequency
determined
Prior art date
Application number
SE7511126A
Other languages
English (en)
Swedish (sv)
Inventor
B G Lofmark
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE7511126A priority Critical patent/SE388100B/xx
Priority to US05/722,273 priority patent/US4092499A/en
Publication of SE388100B publication Critical patent/SE388100B/xx
Priority to FI762705A priority patent/FI762705A/fi
Priority to DE2643646A priority patent/DE2643646C2/de
Priority to IT27839/76A priority patent/IT1072517B/it
Priority to BR7606595A priority patent/BR7606595A/pt
Priority to NO763369A priority patent/NO139304C/no
Priority to DK444876A priority patent/DK145170C/da
Priority to ES452073A priority patent/ES452073A1/es

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
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Filters And Equalizers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Selective Calling Equipment (AREA)
  • Mobile Radio Communication Systems (AREA)
SE7511126A 1975-10-03 1975-10-03 Anordning for detektering av en tonsignal med bestemd frekvens SE388100B (sv)

Priority Applications (9)

Application Number Priority Date Filing Date Title
SE7511126A SE388100B (sv) 1975-10-03 1975-10-03 Anordning for detektering av en tonsignal med bestemd frekvens
US05/722,273 US4092499A (en) 1975-10-03 1976-09-10 Apparatus for detecting a voice frequency signal
FI762705A FI762705A (it) 1975-10-03 1976-09-22
DE2643646A DE2643646C2 (de) 1975-10-03 1976-09-28 Schaltungsanordnung zum Erfassen eines bestimmten Tonsignals mit einer vorbestimmten Frequenz innerhalb eines bestimmten Tonfrequenzbandes
IT27839/76A IT1072517B (it) 1975-10-03 1976-09-30 Apparecchiatura atta a rivelare segnali di tono
BR7606595A BR7606595A (pt) 1975-10-03 1976-10-01 Aperfeicoamento em aparelho para deteccao de sinal de tom
NO763369A NO139304C (no) 1975-10-03 1976-10-01 Anordning for detektering av et tonesignal hvis frekvens ligger innenfor et visst tonefrekvensbaand
DK444876A DK145170C (da) 1975-10-03 1976-10-01 Apparat til detektering af et tonesignal,hvis frekvens liggerinden for et bestemt tonefrekvensbaand
ES452073A ES452073A1 (es) 1975-10-03 1976-10-02 Un aparato para la deteccion de una senal de tono con una frecuencia determinada.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7511126A SE388100B (sv) 1975-10-03 1975-10-03 Anordning for detektering av en tonsignal med bestemd frekvens

Publications (1)

Publication Number Publication Date
SE388100B true SE388100B (sv) 1976-09-20

Family

ID=20325715

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7511126A SE388100B (sv) 1975-10-03 1975-10-03 Anordning for detektering av en tonsignal med bestemd frekvens

Country Status (9)

Country Link
US (1) US4092499A (it)
BR (1) BR7606595A (it)
DE (1) DE2643646C2 (it)
DK (1) DK145170C (it)
ES (1) ES452073A1 (it)
FI (1) FI762705A (it)
IT (1) IT1072517B (it)
NO (1) NO139304C (it)
SE (1) SE388100B (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169969A (en) * 1974-11-21 1979-10-02 Societe Lignes Telegraphiques Et Telephoniques Apparatus for detecting in-band signalling signals
JPS605658A (ja) * 1983-06-07 1985-01-12 Hashimoto Corp 秘書電話方式
JP2598913Y2 (ja) * 1992-07-27 1999-08-23 ミツミ電機株式会社 データスライサ
US5408529A (en) * 1993-06-02 1995-04-18 Motorola, Inc. Dual tone detector operable in the presence of speech or background noise and method therefor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1487973B2 (de) * 1966-05-12 1970-10-08 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für einen sprachgeschützten Ein- oder Mehrfrequenz-Signalempfänger
DE1537338B2 (de) * 1967-07-21 1974-11-14 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zur empfangsseitigen Fehlererkennung bei der Datenübertragung und Schaltungsanordnung zur Durchführung des Verfahrens
FR2141502B1 (it) * 1971-06-01 1973-06-29 Ibm France

Also Published As

Publication number Publication date
FI762705A (it) 1977-04-04
NO139304C (no) 1979-02-14
DK145170C (da) 1983-02-21
DK444876A (da) 1977-04-04
BR7606595A (pt) 1977-07-05
DE2643646C2 (de) 1986-06-26
IT1072517B (it) 1985-04-10
DE2643646A1 (de) 1977-04-14
ES452073A1 (es) 1977-10-01
NO763369L (it) 1977-04-05
DK145170B (da) 1982-09-20
NO139304B (no) 1978-10-30
US4092499A (en) 1978-05-30

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