FR2311460A1 - MULTI-FREQUENCY SIGNAL RECEIVER - Google Patents

MULTI-FREQUENCY SIGNAL RECEIVER

Info

Publication number
FR2311460A1
FR2311460A1 FR7614637A FR7614637A FR2311460A1 FR 2311460 A1 FR2311460 A1 FR 2311460A1 FR 7614637 A FR7614637 A FR 7614637A FR 7614637 A FR7614637 A FR 7614637A FR 2311460 A1 FR2311460 A1 FR 2311460A1
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Withdrawn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
FR7614637A
Other languages
French (fr)
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 FR2311460A1 publication Critical patent/FR2311460A1/en
Withdrawn legal-status Critical Current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)
  • Measuring Frequencies, Analyzing Spectra (AREA)
FR7614637A 1975-05-16 1976-05-14 MULTI-FREQUENCY SIGNAL RECEIVER Withdrawn FR2311460A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752521983 DE2521983A1 (en) 1975-05-16 1975-05-16 FREQUENCY SELECTIVE SIGNAL RECEIVER

Publications (1)

Publication Number Publication Date
FR2311460A1 true FR2311460A1 (en) 1976-12-10

Family

ID=5946782

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7614637A Withdrawn FR2311460A1 (en) 1975-05-16 1976-05-14 MULTI-FREQUENCY SIGNAL RECEIVER

Country Status (5)

Country Link
AU (1) AU1398676A (en)
BE (1) BE841907R (en)
DE (1) DE2521983A1 (en)
FR (1) FR2311460A1 (en)
GB (1) GB1529506A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0566928A2 (en) * 1992-04-24 1993-10-27 Alcatel Australia Limited Tone detection method for telephone subset

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU663370B2 (en) * 1992-04-24 1995-10-05 Alcatel Australia Limited Tone detection method for telephone subset
CN109525356B (en) * 2018-09-28 2024-01-09 成都大公博创信息技术有限公司 Management and control method for cheating radio signals in strong-immunity examination

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2270592A1 (en) * 1974-05-10 1975-12-05 Int Standard Electric Corp Signal frequency detector for push button dialing - measures period during clock source controlled periods

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2270592A1 (en) * 1974-05-10 1975-12-05 Int Standard Electric Corp Signal frequency detector for push button dialing - measures period during clock source controlled periods

Non-Patent Citations (1)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0566928A2 (en) * 1992-04-24 1993-10-27 Alcatel Australia Limited Tone detection method for telephone subset
EP0566928A3 (en) * 1992-04-24 1994-08-10 Alcatel Australia Tone detection method for telephone subset

Also Published As

Publication number Publication date
BE841907R (en) 1976-11-17
GB1529506A (en) 1978-10-25
AU1398676A (en) 1977-11-24
DE2521983A1 (en) 1976-11-25

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Legal Events

Date Code Title Description
ST Notification of lapse