FR2373926A1 - Recepteur de signaux multifrequences - Google Patents

Recepteur de signaux multifrequences

Info

Publication number
FR2373926A1
FR2373926A1 FR7637291A FR7637291A FR2373926A1 FR 2373926 A1 FR2373926 A1 FR 2373926A1 FR 7637291 A FR7637291 A FR 7637291A FR 7637291 A FR7637291 A FR 7637291A FR 2373926 A1 FR2373926 A1 FR 2373926A1
Authority
FR
France
Prior art keywords
signal
frequency
receiver
frequency signal
signal receiver
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.)
Granted
Application number
FR7637291A
Other languages
English (en)
Other versions
FR2373926B1 (fr
Inventor
Xavier Chaveron
Maurice Jean Clerc
Rene Wallstein
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.)
Constr Telephoniques
Original Assignee
Constr Telephoniques
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 Constr Telephoniques filed Critical Constr Telephoniques
Priority to FR7637291A priority Critical patent/FR2373926A1/fr
Priority to GB5070677A priority patent/GB1542836A/en
Publication of FR2373926A1 publication Critical patent/FR2373926A1/fr
Application granted granted Critical
Publication of FR2373926B1 publication Critical patent/FR2373926B1/fr
Granted 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
    • H04Q1/453—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)
  • Circuits Of Receivers In General (AREA)

Abstract

L'invention concerne un récepteur de signaux multifréquences. Le récepteur comprend, pour chaque fréquence à détecter, un mélangeur NB, un détecteur DT recevant le signal de sortie du mélangeur ainsi que deux signaux fournis par un circuit de seuil commun CS, pour fournir un signal ST caractérisant la présence ou l'absence d'une fréquence en fonction uniquement de critères de seuil. Le récepteur comprend en outre une logique commune CL éliminant tous les signaux non significatifs partir de deux critères : tout signal de code doit être formé de deux fréquences parmi six; tout signal de code doit persister pendant un temps minimum. L'invention s'applique dans les signaleurs téléphoniques.
FR7637291A 1976-12-10 1976-12-10 Recepteur de signaux multifrequences Granted FR2373926A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7637291A FR2373926A1 (fr) 1976-12-10 1976-12-10 Recepteur de signaux multifrequences
GB5070677A GB1542836A (en) 1976-12-10 1977-12-06 Multifrequency signal receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7637291A FR2373926A1 (fr) 1976-12-10 1976-12-10 Recepteur de signaux multifrequences

Publications (2)

Publication Number Publication Date
FR2373926A1 true FR2373926A1 (fr) 1978-07-07
FR2373926B1 FR2373926B1 (fr) 1982-12-10

Family

ID=9180916

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7637291A Granted FR2373926A1 (fr) 1976-12-10 1976-12-10 Recepteur de signaux multifrequences

Country Status (2)

Country Link
FR (1) FR2373926A1 (fr)
GB (1) GB1542836A (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555435A (en) * 1968-11-21 1971-01-12 Robert E Vosteen Multifrequency signal detector
FR2118090A1 (fr) * 1970-12-18 1972-07-28 Ibm
FR2124484A1 (fr) * 1971-02-05 1972-09-22 Philips Nv
US3914557A (en) * 1973-04-11 1975-10-21 Bell Telephone Labor Inc Multifrequency tone detecting arrangement
FR2295665A1 (fr) * 1974-12-18 1976-07-16 Labo Cent Telecommunicat Recepteur numerique de signaux multifrequences

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555435A (en) * 1968-11-21 1971-01-12 Robert E Vosteen Multifrequency signal detector
FR2118090A1 (fr) * 1970-12-18 1972-07-28 Ibm
FR2124484A1 (fr) * 1971-02-05 1972-09-22 Philips Nv
US3914557A (en) * 1973-04-11 1975-10-21 Bell Telephone Labor Inc Multifrequency tone detecting arrangement
FR2295665A1 (fr) * 1974-12-18 1976-07-16 Labo Cent Telecommunicat Recepteur numerique de signaux multifrequences

Also Published As

Publication number Publication date
FR2373926B1 (fr) 1982-12-10
GB1542836A (en) 1979-03-28

Similar Documents

Publication Publication Date Title
FR2389280A1 (fr) Systeme de traitement de signaux
GB1517602A (en) Apparatus for detecting the number of objects
FR2419637A1 (fr) Dispositif de reduction de bruit pour signaux de television en couleurs
GB1248058A (en) Improvements in or relating to mobile radio telephone systems
EP0700222A3 (fr) Appareil de sélection d'appel
DE58908713D1 (de) Empfänger für bandgespreizte Signale, insbesondere GPS-Empfänger.
CN107067679A (zh) 一种报警方法及装置
FR2373926A1 (fr) Recepteur de signaux multifrequences
SE7600836L (sv) Forfarande for frekvensdetektering
FR2443783A1 (fr) Detecteur de signaux multifrequences
NO874693L (no) Kopling for gjengivelsesdelen i en for et telefonsystem beregnet fm-mottager.
FI981960A (fi) Älyverkkopalvelujen suorittaminen
EP0698978A3 (fr) Circuit de communication interactif
OA00573A (fr) Système de détermination du site ou de l'azimut d'un mobile.
JPS60257650A (ja) エネルギ検出回路
FR2394935A1 (fr) Circuit pour la reduction des parasites dans un radio-recepteur fm
JPS5548678A (en) Automatic time correction device
US5926542A (en) Telephone circuit capable of inhibiting noise of customer premises equipment alerting signal
FR2404336A1 (fr) Circuit d'elimination du bruit
FR2385887A1 (fr) Systeme de commande pour tetes de puits sous-marins
FR2379218A1 (fr) Dispositif d'identification d'une composante dans un signal electrique et recepteur de numerotation telephonique utilisant un tel dispositif
JPS5634271A (en) Service tariff detection method of section party telephone set within station yard and unit used this method
JPS55125735A (en) Data trasmission system using power line
JPS53128208A (en) Ringer signal detector circuit
GOLIANITSKII Optimal detection of signals on a background of normal noise of a multipositional system

Legal Events

Date Code Title Description
TP Transmission of property