FR2410392A1 - Detecteur de decalage de phase pour une frequence de commande - Google Patents

Detecteur de decalage de phase pour une frequence de commande

Info

Publication number
FR2410392A1
FR2410392A1 FR7833029A FR7833029A FR2410392A1 FR 2410392 A1 FR2410392 A1 FR 2410392A1 FR 7833029 A FR7833029 A FR 7833029A FR 7833029 A FR7833029 A FR 7833029A FR 2410392 A1 FR2410392 A1 FR 2410392A1
Authority
FR
France
Prior art keywords
command frequency
phase offset
offset detector
amplitudes
threshold
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
FR7833029A
Other languages
English (en)
Other versions
FR2410392B1 (fr
Inventor
Richard Faist Challen
Terry Neale Garner
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of FR2410392A1 publication Critical patent/FR2410392A1/fr
Application granted granted Critical
Publication of FR2410392B1 publication Critical patent/FR2410392B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/027—Selective call decoders using frequency address codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)
  • Transmitters (AREA)

Abstract

L'INVENTION CONCERNE LES TELECOMMUNICATIONS. DANS UN SYSTEME DE TRANSMISSION DANS LEQUEL ON UTILISE UNE FREQUENCE DE COMMANDE POUR COMMANDER LE FONCTIONNEMENT D'UN RECEPTEUR, CE DERNIER COMPORTE DES CIRCUITS QUI TRAITENT LES PHASES ET LES AMPLITUDES MOYENNES ET INSTANTANEES DE LA FREQUENCE DE COMMANDE, ET DES CIRCUITS A SEUIL 45X, 45Y, POUR ENGENDRER DES SIGNAUX DE COMMANDE. LE SEUIL PEUT VARIER EN FONCTION DU NOMBRE D'OBSERVATIONS FAITES SUR LES PHASES ET LES AMPLITUDES MOYENNES ET INSTANTANEES. APPLICATION AUX RECEPTEURS DES RADIOTELEPHONES.
FR7833029A 1977-11-23 1978-11-23 Detecteur de decalage de phase pour une frequence de commande Granted FR2410392A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/854,060 US4171516A (en) 1977-11-23 1977-11-23 Tone phase shift detector

Publications (2)

Publication Number Publication Date
FR2410392A1 true FR2410392A1 (fr) 1979-06-22
FR2410392B1 FR2410392B1 (fr) 1983-11-18

Family

ID=25317629

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7833029A Granted FR2410392A1 (fr) 1977-11-23 1978-11-23 Detecteur de decalage de phase pour une frequence de commande

Country Status (8)

Country Link
US (1) US4171516A (fr)
JP (1) JPS5485621A (fr)
DE (1) DE2850414A1 (fr)
FR (1) FR2410392A1 (fr)
GB (1) GB2008826B (fr)
HK (1) HK10887A (fr)
MY (1) MY8600018A (fr)
SG (1) SG4685G (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2087198B (en) * 1980-10-28 1985-02-27 Plessey Co Ltd Data decoding
US5327580A (en) * 1990-10-12 1994-07-05 Ericsson Ge Mobile Communications Inc. Full duplex RF repeater/base station providing microprocessor-controlled simultaneous CTCSS tone encode/decode
US6760348B1 (en) * 1998-12-28 2004-07-06 Globespanvirata, Inc. System and method for tone detection in a discrete multi-tone system
KR100356310B1 (ko) * 2000-04-19 2002-10-12 주식회사 제이콤 연속톤스켈치 제어시스템을 이용한 데이타의 송수신 방법및 장치
US20040266355A1 (en) * 2003-06-26 2004-12-30 Jany-Yee Hsu Method for eliminating irritating noise at the end of communication for a walkie talkie

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899739A (en) * 1973-09-04 1975-08-12 Gen Electric Decode squelch circuit for a continuous tone control radio receiver
US3949301A (en) * 1975-06-27 1976-04-06 Ford Motor Company Digital click removal and squelch control circuit for an FM receiver
US3962645A (en) * 1974-11-06 1976-06-08 General Electric Company Tone frequency detecting circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1270113A (en) * 1969-01-03 1972-04-12 English Electric Co Ltd Improvements in or relating to phase-responsive circuits

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899739A (en) * 1973-09-04 1975-08-12 Gen Electric Decode squelch circuit for a continuous tone control radio receiver
US3962645A (en) * 1974-11-06 1976-06-08 General Electric Company Tone frequency detecting circuit
US3949301A (en) * 1975-06-27 1976-04-06 Ford Motor Company Digital click removal and squelch control circuit for an FM receiver

Also Published As

Publication number Publication date
GB2008826A (en) 1979-06-06
HK10887A (en) 1987-02-06
MY8600018A (en) 1986-12-31
JPS5485621A (en) 1979-07-07
US4171516A (en) 1979-10-16
DE2850414A1 (de) 1979-05-31
SG4685G (en) 1985-06-14
FR2410392B1 (fr) 1983-11-18
GB2008826B (en) 1982-02-10
JPS6219096B2 (fr) 1987-04-27

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Legal Events

Date Code Title Description
ST Notification of lapse