ES8608757A1 - Un detector de perturbacion,para detectar impulsos de per- turbacion en una senal entrante no limitada de radio aplica-da por modulacion en una portadora - Google Patents

Un detector de perturbacion,para detectar impulsos de per- turbacion en una senal entrante no limitada de radio aplica-da por modulacion en una portadora

Info

Publication number
ES8608757A1
ES8608757A1 ES545385A ES545385A ES8608757A1 ES 8608757 A1 ES8608757 A1 ES 8608757A1 ES 545385 A ES545385 A ES 545385A ES 545385 A ES545385 A ES 545385A ES 8608757 A1 ES8608757 A1 ES 8608757A1
Authority
ES
Spain
Prior art keywords
signal
input
threshold
circuit
noise 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
Application number
ES545385A
Other languages
English (en)
Other versions
ES545385A0 (es
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES8608757A1 publication Critical patent/ES8608757A1/es
Publication of ES545385A0 publication Critical patent/ES545385A0/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • 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
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

DETECTOR DE IMPULSOS DE PERTURBACION EN UNA SEÑAL ENTRANTE NO LIMITADA DE RADIO APLICADA POR MODULACION EN UNA PORTADORA. CONSTA DE UN CIRCUITO DE DETECCION DE AMPLITUD (20) AL QUE SE CONECTA UN CIRCUITO (23) DE COMPARACION DE SEÑALES QUE PRESENTA DOS ENTRADAS, UNA DE SEÑAL (22) Y OTRA DE UMBRAL (25). A ESTA ENTRADA SE LE APLICAN DOS SEÑALES. LA PRIMERA DEPENDE DEL NIVEL MEDIO DE ENTRADA DEL DETECTOR DE PERTURBACION; Y LA SEGUNDA DEPENDE DE LA FRECUENCIA DE REPETICION DE LOS IMPULSOS DE PERTURBACION. EL CIRCUITO DE DETECCION DE AMPLITUD ESTA CONECTADO A UNA ENTRADA DEL DETECTOR DE PERTURBACION POR UNA ENTRADA DE SEÑAL Y UNA SALIDA DE ENVOLVENTE, ACOPLADA A UN FILTRO DE PASO BAJO, EXISTIENDO UN SEGUNDO CIRCUITO DE COMPARACION, QUE SE ACOPLE A UN AMPLIFICADOR DIFERENCIAL.
ES545385A 1984-07-23 1985-07-19 Un detector de perturbacion,para detectar impulsos de per- turbacion en una senal entrante no limitada de radio aplica-da por modulacion en una portadora Expired ES8608757A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8402321A NL8402321A (nl) 1984-07-23 1984-07-23 Storingsdetektor.

Publications (2)

Publication Number Publication Date
ES8608757A1 true ES8608757A1 (es) 1986-06-16
ES545385A0 ES545385A0 (es) 1986-06-16

Family

ID=19844255

Family Applications (1)

Application Number Title Priority Date Filing Date
ES545385A Expired ES8608757A1 (es) 1984-07-23 1985-07-19 Un detector de perturbacion,para detectar impulsos de per- turbacion en una senal entrante no limitada de radio aplica-da por modulacion en una portadora

Country Status (6)

Country Link
US (1) US4648126A (es)
EP (1) EP0172590A1 (es)
JP (1) JPS6139732A (es)
KR (1) KR860001646A (es)
ES (1) ES8608757A1 (es)
NL (1) NL8402321A (es)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3686421T2 (de) * 1986-04-03 1993-01-28 Motorola Inc Ukw-empfaenger mit rauschunterdrueckung beim empfang von signalen mit "raleigh"-ueberblendung.
US4792991A (en) * 1986-04-03 1988-12-20 Motorola, Inc. FM receiver having improved audio quality in response to Rayleigh faded received signals
US4969207A (en) * 1987-03-20 1990-11-06 Nippon Telegraph And Telephone Corporation Radio receiver with reception deterioration compensation
FR2618625B1 (fr) * 1987-07-24 1989-11-24 Labo Electronique Physique Dispositif d'amelioration du decodage de signaux numeriques lors de transmissions en modulation de frequence
MX161741A (es) * 1987-08-28 1990-12-20 Motorola Inc Sistema mejorado de comunicaciones de frecuencia modulada
US4998289A (en) * 1988-06-02 1991-03-05 Motorola, Inc. Signal integrity control technique for an RF communication system
US4922549A (en) * 1988-10-27 1990-05-01 Motorola, Inc. Digital FM squelch detector
US5408694A (en) * 1992-01-28 1995-04-18 National Semiconductor Corporation Receiver squelch circuit with adjustable threshold
US5507037A (en) * 1992-05-22 1996-04-09 Advanced Micro Devices, Inc. Apparatus and method for discriminating signal noise from saturated signals and from high amplitude signals
US5369791A (en) * 1992-05-22 1994-11-29 Advanced Micro Devices, Inc. Apparatus and method for discriminating and suppressing noise within an incoming signal
DE4305961A1 (de) * 1993-02-26 1994-09-01 Nokia Deutschland Gmbh Anordnung zur Erzeugung eines Rauschdetektorsignals
GB2281425B (en) * 1993-08-27 1997-10-29 Plessey Semiconductors Ltd Logarithmic detector
JPH07231268A (ja) * 1993-12-21 1995-08-29 Toshiba Corp Ｆｍチューナにおけるパルスノイズキャンセラ
KR0175583B1 (ko) * 1996-03-29 1999-03-20 김광호 가청신호 감지에 의해 수신모드를 자동으로 절환하는 팩시밀리 장치 및 그 제어방법
US5794136A (en) * 1996-09-24 1998-08-11 Motorola, Inc. Noise blanker and a radio receiver and method employing same
US6360090B1 (en) * 1998-08-26 2002-03-19 Integration Associates, Inc. Method and apparatus for receiving infrared signals with improved noise immunity
US6304828B1 (en) * 1999-04-02 2001-10-16 The United States Of America As Represented By The Secretary Of The Navy System and method for calibrating a signal detection threshold circuit
EP1229653A1 (en) * 2001-02-02 2002-08-07 Semiconductor Ideas to The Market (ItoM) BV Feedback loop with slew rate limiter
AU2003276579A1 (en) * 2002-12-16 2004-07-09 Koninklijke Philips Electronics N.V. Noise suppression in an fm receiver
JP5699885B2 (ja) * 2011-09-29 2015-04-15 株式会社Ｊｖｃケンウッド ノイズブランカおよびパルスノイズ減衰方法
WO2017038535A1 (ja) * 2015-08-31 2017-03-09 旭化成エレクトロニクス株式会社 復調装置
CN113873089B (zh) * 2020-06-30 2022-09-23 华为技术有限公司 一种降低噪声的方法和装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284714A (en) * 1963-03-12 1966-11-08 Motorola Inc Noise reducing system
US3390339A (en) * 1964-06-01 1968-06-25 Rca Corp Pulse rate limiting circuit
US3613012A (en) * 1969-10-13 1971-10-12 Tracor Adaptive blanking apparatus
US4039959A (en) * 1975-07-31 1977-08-02 Westinghouse Electric Corporation Two-tone decoder having high noise immunity
JPS5689134A (en) * 1979-12-20 1981-07-20 Sanyo Electric Co Ltd Muting circuit
US4371981A (en) * 1980-04-14 1983-02-01 Rockwell International Corporation Spectral squelch
US4327432A (en) * 1980-11-07 1982-04-27 Rca Corporation Video disc player with RFI reduction circuit
US4479252A (en) * 1981-10-09 1984-10-23 Thomson-Csf Device for reduction of the false alarm ratio and monitor receiver comprising such a device of this nature
GB2113047B (en) * 1981-12-21 1985-07-10 Motorola Ltd Noise blanking in a radio receiver

Also Published As

Publication number Publication date
US4648126A (en) 1987-03-03
NL8402321A (nl) 1986-02-17
JPS6139732A (ja) 1986-02-25
EP0172590A1 (en) 1986-02-26
KR860001646A (ko) 1986-03-20
ES545385A0 (es) 1986-06-16

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