FR2385283A1 - Recepteur de signaux selectif du point de vue de la frequence et protege contre un declenchement accidentel par modulation par la voix - Google Patents

Recepteur de signaux selectif du point de vue de la frequence et protege contre un declenchement accidentel par modulation par la voix

Info

Publication number
FR2385283A1
FR2385283A1 FR7807117A FR7807117A FR2385283A1 FR 2385283 A1 FR2385283 A1 FR 2385283A1 FR 7807117 A FR7807117 A FR 7807117A FR 7807117 A FR7807117 A FR 7807117A FR 2385283 A1 FR2385283 A1 FR 2385283A1
Authority
FR
France
Prior art keywords
signal
derives
stored value
recognition circuit
compares data
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Withdrawn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
FR7807117A
Other languages
English (en)
French (fr)
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.)
Siemens Corp
Original Assignee
Siemens 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 Siemens Corp filed Critical Siemens Corp
Publication of FR2385283A1 publication Critical patent/FR2385283A1/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Withdrawn legal-status Critical Current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)
  • Dc Digital Transmission (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Mobile Radio Communication Systems (AREA)
FR7807117A 1977-03-23 1978-03-13 Recepteur de signaux selectif du point de vue de la frequence et protege contre un declenchement accidentel par modulation par la voix Withdrawn FR2385283A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2712831A DE2712831B2 (de) 1977-03-23 1977-03-23 Sprachgeschützter frequenzselektiver Zeichenempfänger

Publications (1)

Publication Number Publication Date
FR2385283A1 true FR2385283A1 (fr) 1978-10-20

Family

ID=6004476

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7807117A Withdrawn FR2385283A1 (fr) 1977-03-23 1978-03-13 Recepteur de signaux selectif du point de vue de la frequence et protege contre un declenchement accidentel par modulation par la voix

Country Status (6)

Country Link
JP (1) JPS53117903A (enrdf_load_stackoverflow)
DE (1) DE2712831B2 (enrdf_load_stackoverflow)
FR (1) FR2385283A1 (enrdf_load_stackoverflow)
IT (1) IT1093892B (enrdf_load_stackoverflow)
NL (1) NL7803090A (enrdf_load_stackoverflow)
SE (1) SE7803253L (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081294A3 (en) * 1981-11-06 1984-05-16 Electronics Corporation Of Israel Limited Tone detector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD259987A3 (de) * 1986-07-07 1988-09-14 Rft Nachrichtenelektronik Albe Verfahren und anordnung zum sprachschutz in mfc-tastwahlempfaengern
DD266253A3 (de) * 1987-06-22 1989-03-29 Leipzig Rft Nachrichtenelekt Universeller digitaler mfc-empfaenger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/77 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081294A3 (en) * 1981-11-06 1984-05-16 Electronics Corporation Of Israel Limited Tone detector

Also Published As

Publication number Publication date
NL7803090A (nl) 1978-09-26
IT7821481A0 (it) 1978-03-22
JPS53117903A (en) 1978-10-14
IT1093892B (it) 1985-07-26
SE7803253L (sv) 1978-09-24
DE2712831A1 (de) 1978-10-05
DE2712831C3 (enrdf_load_stackoverflow) 1980-09-25
DE2712831B2 (de) 1980-01-24

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Legal Events

Date Code Title Description
ST Notification of lapse