ES2134053T3 - Receptor de radio que comprende un circuito de bloqueo automatico. - Google Patents

Receptor de radio que comprende un circuito de bloqueo automatico.

Info

Publication number
ES2134053T3
ES2134053T3 ES97400155T ES97400155T ES2134053T3 ES 2134053 T3 ES2134053 T3 ES 2134053T3 ES 97400155 T ES97400155 T ES 97400155T ES 97400155 T ES97400155 T ES 97400155T ES 2134053 T3 ES2134053 T3 ES 2134053T3
Authority
ES
Spain
Prior art keywords
detector
frequency
band
radio receiver
audio
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 - Lifetime
Application number
ES97400155T
Other languages
English (en)
Inventor
Albert Bertrana
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.)
Groupe President Electronics
Original Assignee
Groupe President Electronics
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 Groupe President Electronics filed Critical Groupe President Electronics
Application granted granted Critical
Publication of ES2134053T3 publication Critical patent/ES2134053T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H03G3/344—Muting responsive to the amount of noise (noise squelch)

Landscapes

  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

EN UN RECEPTOR DE RADIO DEL TIPO DESTINADO A LA RECEPCION DE COMUNICACIONES DE AUDIOFRECENCIA LLEVADAS POR UNA PORTADORA DE ALTA FRECUENCIA Y CUYA APARICION ES ALEATOEIRA EN EL TIEMPO, SE PREVEN ADEMAS DE LOS CIRCUITOS DE SINTONIZACION (1), UN DETECTOR (2), MEDIOS DE AMPLIFICACION DE AUDIOFRECUENCIA (4) Y UN TRANSDUCTOR SONORO (5), MEDIOS INTERRUPTORES CONTROLADOS (3) CONECTADOS ENTRE EL DETECTOR (2) Y LOS MEDIOS DE AMPLIFICACION (4) PARA INTERRUMPIR O RESTABLECER EL PASO DE LA SEÑAL DE AUDIOFRECUENCIA DEL DETECTOR (2) HACIA EL TRANSDUCTOR SONORO (5). UNOS MEDIOS DE FILTRADO Y DE DETECCION (12, 13) FIJAN UN UMBRAL DE SILENCIO PARA ASEGURAR EL BLOQUEO AUTOMATICO. ESTAN DISPUESTOS PARA FIJAR EL UMBRAL DE SILENCIO EN FUNCION DEL NIVEL DE UNA PARTE DEL ESPECTRO DE AUDIOFRECUENCIA QUE SALE DEL DETECTOR (2) CUYA BANDA DE FRECUENCIA CONTIENE EXCLUSIVAMENTE RUIDO Y ESTA SITUADA FUERA DE LA BANDA DE FRECUENCIA DE LA SEÑAL QUE REPRESENTA LA COMUNICACION DE AUDIOFRECUENCIA UTIL PARA SER RECIBIDA. APLICACION PARTICULARMENTE EN LOS EQUIPO QUE TRABAJAN EN LA BANDA LLAMADA "BANDA CIVIL".
ES97400155T 1996-01-25 1997-01-23 Receptor de radio que comprende un circuito de bloqueo automatico. Expired - Lifetime ES2134053T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9600857A FR2744305B1 (fr) 1996-01-25 1996-01-25 Circuit de blocage a reglage automatique pour recepteur radio

Publications (1)

Publication Number Publication Date
ES2134053T3 true ES2134053T3 (es) 1999-09-16

Family

ID=9488460

Family Applications (1)

Application Number Title Priority Date Filing Date
ES97400155T Expired - Lifetime ES2134053T3 (es) 1996-01-25 1997-01-23 Receptor de radio que comprende un circuito de bloqueo automatico.

Country Status (10)

Country Link
US (1) US6208848B1 (es)
EP (1) EP0786860B1 (es)
AT (1) ATE179036T1 (es)
AU (1) AU1548897A (es)
DE (1) DE69700173T2 (es)
ES (1) ES2134053T3 (es)
FR (1) FR2744305B1 (es)
HU (1) HUP9900797A3 (es)
PL (1) PL328059A1 (es)
WO (1) WO1997027669A1 (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6397050B1 (en) * 1999-04-12 2002-05-28 Rockwell Collins, Inc. Multiband squelch method and apparatus
US6671504B1 (en) * 2000-09-29 2003-12-30 Northrop Grumman Corporation Radio squelch techniques
US6842609B2 (en) * 2000-12-05 2005-01-11 Delphi Technologies, Inc. Radio having adjustable seek sensitivity based on average signal strength and method therefor
US6961551B2 (en) 2002-02-01 2005-11-01 M/A-Com Private Radio Systems, Inc. Dual speed squelch circuit and method
US7792815B2 (en) 2006-03-06 2010-09-07 Veveo, Inc. Methods and systems for selecting and presenting content based on context sensitive user preferences
US7653367B2 (en) * 2006-03-30 2010-01-26 Intel Corporation Squelch detector
EP1843467B1 (en) * 2006-04-07 2010-05-26 Rohde & Schwarz GmbH & Co. KG Method and apparatus for squelch gating a receiving signal
KR100897770B1 (ko) * 2007-01-30 2009-05-15 삼성전자주식회사 전송 엔벌로프 검출기의 문턱 전압들 조절 방법들과 상기방법들을 이용한 장치들
US8965290B2 (en) * 2012-03-29 2015-02-24 General Electric Company Amplitude enhanced frequency modulation
CN102843203B (zh) * 2012-08-13 2017-03-15 泉州市琪祥电子科技有限公司 一种自动静噪电路
AT519113B1 (de) * 2016-11-24 2018-04-15 Frequentis Ag Verfahren zur Übertragung von Sprachsignalen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770721A (en) * 1952-05-03 1956-11-13 Motorola Inc Squelch circuit
US4044309A (en) * 1974-07-18 1977-08-23 Narco Scientific Industries, Inc. Automatic squelch circuit with hysteresis
US3979679A (en) * 1975-06-30 1976-09-07 California Microwave, Inc. FM demodulator having squelch circuit using bucket brigade delay line

Also Published As

Publication number Publication date
DE69700173T2 (de) 1999-11-18
WO1997027669A1 (fr) 1997-07-31
DE69700173D1 (de) 1999-05-20
AU1548897A (en) 1997-08-20
US6208848B1 (en) 2001-03-27
PL328059A1 (en) 1999-01-04
ATE179036T1 (de) 1999-04-15
HUP9900797A3 (en) 1999-11-29
EP0786860A1 (fr) 1997-07-30
EP0786860B1 (fr) 1999-04-14
FR2744305A1 (fr) 1997-08-01
HUP9900797A2 (hu) 1999-07-28
FR2744305B1 (fr) 1998-03-27

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