FR2814023B1 - TONE DETECTOR - Google Patents

TONE DETECTOR

Info

Publication number
FR2814023B1
FR2814023B1 FR0011582A FR0011582A FR2814023B1 FR 2814023 B1 FR2814023 B1 FR 2814023B1 FR 0011582 A FR0011582 A FR 0011582A FR 0011582 A FR0011582 A FR 0011582A FR 2814023 B1 FR2814023 B1 FR 2814023B1
Authority
FR
France
Prior art keywords
tone detector
tone
detector
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.)
Expired - Fee Related
Application number
FR0011582A
Other languages
French (fr)
Other versions
FR2814023A1 (en
Inventor
Alain Chianale
Brigitte Belhi
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.)
STMicroelectronics SA
Original Assignee
STMicroelectronics SA
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 STMicroelectronics SA filed Critical STMicroelectronics SA
Priority to FR0011582A priority Critical patent/FR2814023B1/en
Priority to PCT/FR2001/002811 priority patent/WO2002023846A2/en
Publication of FR2814023A1 publication Critical patent/FR2814023A1/en
Application granted granted Critical
Publication of FR2814023B1 publication Critical patent/FR2814023B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
FR0011582A 2000-09-12 2000-09-12 TONE DETECTOR Expired - Fee Related FR2814023B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR0011582A FR2814023B1 (en) 2000-09-12 2000-09-12 TONE DETECTOR
PCT/FR2001/002811 WO2002023846A2 (en) 2000-09-12 2001-09-11 Dial tone detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0011582A FR2814023B1 (en) 2000-09-12 2000-09-12 TONE DETECTOR

Publications (2)

Publication Number Publication Date
FR2814023A1 FR2814023A1 (en) 2002-03-15
FR2814023B1 true FR2814023B1 (en) 2003-01-31

Family

ID=8854189

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0011582A Expired - Fee Related FR2814023B1 (en) 2000-09-12 2000-09-12 TONE DETECTOR

Country Status (2)

Country Link
FR (1) FR2814023B1 (en)
WO (1) WO2002023846A2 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675129A (en) * 1970-05-13 1972-07-04 Collins Radio Co Differentially coherent phase shift keyed digital demodulating apparatus
US4291269A (en) * 1979-06-28 1981-09-22 Rca Corporation System and method for frequency discrimination
US5007069A (en) * 1987-11-13 1991-04-09 Talkie Tooter Inc. Decoding of signals using cophase and differentiating signal detection
JPH10136042A (en) * 1996-11-01 1998-05-22 Hitachi Denshi Ltd Orthogonal demodulator

Also Published As

Publication number Publication date
FR2814023A1 (en) 2002-03-15
WO2002023846A2 (en) 2002-03-21
WO2002023846A3 (en) 2002-05-10

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Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20080531