FR2307402A1 - Recepteur de signaux multifrequences - Google Patents

Recepteur de signaux multifrequences

Info

Publication number
FR2307402A1
FR2307402A1 FR7610448A FR7610448A FR2307402A1 FR 2307402 A1 FR2307402 A1 FR 2307402A1 FR 7610448 A FR7610448 A FR 7610448A FR 7610448 A FR7610448 A FR 7610448A FR 2307402 A1 FR2307402 A1 FR 2307402A1
Authority
FR
France
Prior art keywords
frequency signal
signal receiver
receiver
frequency
signal
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.)
Withdrawn
Application number
FR7610448A
Other languages
English (en)
Inventor
Lorenz Gasser
Dietrich Illi
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2307402A1 publication Critical patent/FR2307402A1/fr
Withdrawn legal-status Critical Current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
    • H04Q1/45—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)
  • Synchronisation In Digital Transmission Systems (AREA)
FR7610448A 1975-04-10 1976-04-09 Recepteur de signaux multifrequences Withdrawn FR2307402A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752515769 DE2515769A1 (de) 1975-04-10 1975-04-10 Frequenzselektiver signalempfaenger

Publications (1)

Publication Number Publication Date
FR2307402A1 true FR2307402A1 (fr) 1976-11-05

Family

ID=5943564

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7610448A Withdrawn FR2307402A1 (fr) 1975-04-10 1976-04-09 Recepteur de signaux multifrequences

Country Status (5)

Country Link
AU (1) AU1290076A (fr)
BE (1) BE841906R (fr)
DE (1) DE2515769A1 (fr)
FR (1) FR2307402A1 (fr)
GB (1) GB1518006A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440124A1 (fr) * 1978-10-24 1980-05-23 Int Standard Electric Corp Recepteur de radio pour sons modules en frequence
EP0016692A1 (fr) * 1979-03-16 1980-10-01 Thomson-Csf Circuit comparateur de fréquences et dispositif d'appel sélectif comportant un tel circuit
FR2592252A1 (fr) * 1985-12-20 1987-06-26 Int Standard Electric Corp Circuit de detection de tonalite de silence numerique destine a un reseau radio

Families Citing this family (2)

* 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.
IT1072242B (it) * 1976-12-17 1985-04-10 Cselt Centro Studi Lab Telecom Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2270591A1 (en) * 1974-05-10 1975-12-05 Int Standard Electric Corp Signal frequency detector for push button dialing - employs counting circuits for specific time periods

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2270591A1 (en) * 1974-05-10 1975-12-05 Int Standard Electric Corp Signal frequency detector for push button dialing - employs counting circuits for specific time periods

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/72 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440124A1 (fr) * 1978-10-24 1980-05-23 Int Standard Electric Corp Recepteur de radio pour sons modules en frequence
EP0016692A1 (fr) * 1979-03-16 1980-10-01 Thomson-Csf Circuit comparateur de fréquences et dispositif d'appel sélectif comportant un tel circuit
FR2451691A1 (fr) * 1979-03-16 1980-10-10 Thomson Csf Circuit comparateur de frequences et dispositif d'appel selectif comportant un tel circuit
FR2592252A1 (fr) * 1985-12-20 1987-06-26 Int Standard Electric Corp Circuit de detection de tonalite de silence numerique destine a un reseau radio

Also Published As

Publication number Publication date
GB1518006A (en) 1978-07-19
BE841906R (fr) 1976-11-17
DE2515769A1 (de) 1976-10-21
AU1290076A (en) 1977-10-20

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Legal Events

Date Code Title Description
ST Notification of lapse