ATE24812T1 - Tondetektor und mehrfrequenzempfaenger mit diesem detektor. - Google Patents

Tondetektor und mehrfrequenzempfaenger mit diesem detektor.

Info

Publication number
ATE24812T1
ATE24812T1 AT82430017T AT82430017T ATE24812T1 AT E24812 T1 ATE24812 T1 AT E24812T1 AT 82430017 T AT82430017 T AT 82430017T AT 82430017 T AT82430017 T AT 82430017T AT E24812 T1 ATE24812 T1 AT E24812T1
Authority
AT
Austria
Prior art keywords
signal
frequency range
detector
tone
rho
Prior art date
Application number
AT82430017T
Other languages
English (en)
Inventor
Dominique Godard
Emile Morlec
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Application granted granted Critical
Publication of ATE24812T1 publication Critical patent/ATE24812T1/de

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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Circuits Of Receivers In General (AREA)
  • Burglar Alarm Systems (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
AT82430017T 1982-06-25 1982-06-25 Tondetektor und mehrfrequenzempfaenger mit diesem detektor. ATE24812T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82430017A EP0097754B1 (de) 1982-06-25 1982-06-25 Tondetektor und Mehrfrequenzempfänger mit diesem Detektor

Publications (1)

Publication Number Publication Date
ATE24812T1 true ATE24812T1 (de) 1987-01-15

Family

ID=8189981

Family Applications (1)

Application Number Title Priority Date Filing Date
AT82430017T ATE24812T1 (de) 1982-06-25 1982-06-25 Tondetektor und mehrfrequenzempfaenger mit diesem detektor.

Country Status (7)

Country Link
US (1) US4604713A (de)
EP (1) EP0097754B1 (de)
JP (1) JPH0666980B2 (de)
AT (1) ATE24812T1 (de)
BR (1) BR8303365A (de)
CA (1) CA1188015A (de)
DE (1) DE3275052D1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4833399A (en) * 1988-06-13 1989-05-23 Texas Instruments Incorporated DTMF receiver
US5257309A (en) * 1990-12-11 1993-10-26 Octel Communications Corporation Dual tone multifrequency signal detection and identification methods and apparatus
CH682783A5 (de) * 1991-09-24 1993-11-15 Alcatel Str Ag Verfahren zur Pegelbestimmung bei vorbestimmten Frequenzen eines Tonfrequenzsignales.
US5995557A (en) * 1997-06-12 1999-11-30 Nortel Networks Corporation Tone detection with aliasing bandpass filters
DE10055375A1 (de) * 2000-11-08 2002-05-23 Infineon Technologies Ag Auswerteschaltung für Wechselspannungsimpulse
JP4807384B2 (ja) * 2008-08-11 2011-11-02 Ｎｅｃインフロンティア株式会社 電話通信システム、多周波信号受信方法、およびプログラム
US10078959B2 (en) 2015-05-20 2018-09-18 Google Llc Systems and methods for testing hazard detectors in a smart home
US9454893B1 (en) 2015-05-20 2016-09-27 Google Inc. Systems and methods for coordinating and administering self tests of smart home devices having audible outputs
US9953516B2 (en) * 2015-05-20 2018-04-24 Google Llc Systems and methods for self-administering a sound test

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7511707A (nl) * 1975-10-06 1977-04-12 Philips Nv Kruiscorrelatie-inrichting.
FR2407621A1 (fr) * 1977-10-27 1979-05-25 Ibm France Procede et dispositif pour determiner l'ecart de phase dans un systeme utilisant la modulation par saut de phase
CH635695A5 (de) * 1978-08-31 1983-04-15 Landis & Gyr Ag Detektor zur feststellung der anwesenheit mindestens eines elektrischen signals mit einer vorbestimmten charakteristik.
US4354248A (en) * 1979-11-28 1982-10-12 Motorola, Inc. Programmable multifrequency tone receiver
US4258423A (en) * 1979-12-05 1981-03-24 The United States Of America As Represented By The Secretary Of The Army Microprocessor controlled digital detector
US4484035A (en) * 1980-09-29 1984-11-20 Transwave Dual tone multi frequency digital detector
US4363100A (en) * 1980-10-28 1982-12-07 Northern Telecom Limited Detection of tones in sampled signals

Also Published As

Publication number Publication date
EP0097754B1 (de) 1987-01-07
JPH0666980B2 (ja) 1994-08-24
JPS598497A (ja) 1984-01-17
BR8303365A (pt) 1984-02-07
CA1188015A (en) 1985-05-28
EP0097754A1 (de) 1984-01-11
DE3275052D1 (en) 1987-02-12
US4604713A (en) 1986-08-05

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties