ES357297A1 - Detector de tono. - Google Patents

Detector de tono.

Info

Publication number
ES357297A1
ES357297A1 ES357297A ES357297A ES357297A1 ES 357297 A1 ES357297 A1 ES 357297A1 ES 357297 A ES357297 A ES 357297A ES 357297 A ES357297 A ES 357297A ES 357297 A1 ES357297 A1 ES 357297A1
Authority
ES
Spain
Prior art keywords
given frequency
input
tone
tuned
tone detector
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
ES357297A
Other languages
English (en)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES357297A1 publication Critical patent/ES357297A1/es
Expired legal-status Critical Current

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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/12—Electric signal transmission systems in which the signal transmitted is frequency or phase of ac
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
  • Telephonic Communication Services (AREA)
ES357297A 1967-08-17 1967-08-16 Detector de tono. Expired ES357297A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US66134567A 1967-08-17 1967-08-17

Publications (1)

Publication Number Publication Date
ES357297A1 true ES357297A1 (es) 1970-03-01

Family

ID=24653205

Family Applications (1)

Application Number Title Priority Date Filing Date
ES357297A Expired ES357297A1 (es) 1967-08-17 1967-08-16 Detector de tono.

Country Status (5)

Country Link
US (1) US3522544A (es)
DE (1) DE1762744A1 (es)
ES (1) ES357297A1 (es)
FR (1) FR1582238A (es)
NL (1) NL6811658A (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652805A (en) * 1969-10-10 1972-03-28 Information Control Systems In Binary frequency identification system
US3839649A (en) * 1972-03-04 1974-10-01 Sony Corp Signal discriminating circuit
DE2548104C2 (de) * 1975-10-28 1982-05-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Sprachgesicherte Tonruf-Auswerte- Schaltung
FR2404335A1 (fr) * 1977-09-27 1979-04-20 Thomson Csf Dispositif de restitution d'un signal binaire
JPS55109968A (en) * 1979-02-16 1980-08-23 Nissan Motor Co Ltd Frequency decision circuit
US4755792A (en) * 1985-06-13 1988-07-05 Black & Decker Inc. Security control system
US4845379A (en) * 1988-07-05 1989-07-04 International Business Machines Corporation Sense circuit for detecting absence of a pulse train

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920280A (en) * 1956-04-30 1960-01-05 North American Aviation Inc High selectivity reject network
US2951973A (en) * 1957-08-28 1960-09-06 Duane E Atkinson Signalling system
US3173065A (en) * 1962-08-06 1965-03-09 Automatic Elect Lab Tone detector
US3223929A (en) * 1963-10-03 1965-12-14 Ampex Binary frequency modulation demodulator

Also Published As

Publication number Publication date
US3522544A (en) 1970-08-04
NL6811658A (es) 1969-02-19
DE1762744A1 (de) 1970-09-17
FR1582238A (es) 1969-09-26

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