IT1252384B - Equalizzazione dei livelli audio di radiosegnali fm a diffusione circolare e di radiosegnali fm a limitata deviazione di frequenza - Google Patents

Equalizzazione dei livelli audio di radiosegnali fm a diffusione circolare e di radiosegnali fm a limitata deviazione di frequenza

Info

Publication number
IT1252384B
IT1252384B ITMI913006A ITMI913006A IT1252384B IT 1252384 B IT1252384 B IT 1252384B IT MI913006 A ITMI913006 A IT MI913006A IT MI913006 A ITMI913006 A IT MI913006A IT 1252384 B IT1252384 B IT 1252384B
Authority
IT
Italy
Prior art keywords
radio signals
signals
deviation
equalizing
frequency deviation
Prior art date
Application number
ITMI913006A
Other languages
English (en)
Inventor
Leroy Samuel Wignot
Dal Frank Griepentrog
Original Assignee
Thomson Consumer 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 Thomson Consumer Electronics filed Critical Thomson Consumer Electronics
Publication of ITMI913006A0 publication Critical patent/ITMI913006A0/it
Publication of ITMI913006A1 publication Critical patent/ITMI913006A1/it
Application granted granted Critical
Publication of IT1252384B publication Critical patent/IT1252384B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • 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
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/3026—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being discontinuously variable, e.g. controlled by switching
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuits Of Receivers In General (AREA)
  • Television Receiver Circuits (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

Un ricevitore di televisione include un singolo sintonizzatore (102) per sintonizzare sia i canali di televisione sia le stazioni FM a diffusione circolare. Il sintonizzatore (102) viene utilizzato come il primo stadio di conversione di un ricevitore FM a doppia conversione, in cui il miscelatore (180b) di un circuito integrato per radio FM (180) viene utilizzato come il secondo stadio di conversione. Viene impiegato un singolo circuito discriminatore (183) per sintonizzare i radiosegnali FM presentanti una prima deviazione quali, ad esempio, i radiosegnali FM a diffusione circolare e i radiosegnali FM presentanti una seconda deviazione quali, ad esempio, i segnali di informazione del Servizio Metereologico Nazionale. Il complesso circuitale (137) per amplificare il segnale in uscita dal circuito discriminatore presenta un primo guadagno quando vengono amplificati i segnali FM presentanti la prima deviazione, mentre presenta un secondo segnale quando vengono amplificati i segnali FM ai quali si associa la seconda deviazione.
ITMI913006A 1990-11-15 1991-11-12 Equalizzazione dei livelli audio di radiosegnali fm a diffusione circolare e di radiosegnali fm a limitata deviazione di frequenza IT1252384B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61303490A 1990-11-15 1990-11-15

Publications (3)

Publication Number Publication Date
ITMI913006A0 ITMI913006A0 (it) 1991-11-12
ITMI913006A1 ITMI913006A1 (it) 1993-05-12
IT1252384B true IT1252384B (it) 1995-06-12

Family

ID=24455604

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI913006A IT1252384B (it) 1990-11-15 1991-11-12 Equalizzazione dei livelli audio di radiosegnali fm a diffusione circolare e di radiosegnali fm a limitata deviazione di frequenza

Country Status (8)

Country Link
US (1) US5361406A (it)
JP (1) JP3175093B2 (it)
KR (1) KR100210312B1 (it)
CN (1) CN1027781C (it)
DE (1) DE4136471A1 (it)
GB (1) GB2251995B (it)
IT (1) IT1252384B (it)
MY (1) MY108617A (it)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05268501A (ja) * 1991-12-27 1993-10-15 Gold Star Co Ltd 衛星放送受信システム
WO1996016511A1 (fr) * 1994-11-23 1996-05-30 Serge Saadoun Dispositif d'adaptation automatique du niveau sonore moyen d'un recepteur de television
WO1997043852A1 (en) * 1995-02-10 1997-11-20 Samsung Electronics Co., Ltd. Television receiver with doors for its display screen which doors contain loudspeakers
US6064253A (en) * 1998-04-20 2000-05-16 Endgate Corporation Multiple stage self-biasing RF transistor circuit
ATE276605T1 (de) 1998-11-12 2004-10-15 Broadcom Corp Integrierte tunerarchitektur
US6360078B1 (en) * 1998-12-23 2002-03-19 Nortel Networks Limited Method of compensating for group time delay asymmetry in a radio receiver
US6339696B1 (en) * 1999-11-05 2002-01-15 Magnadyne Corporation In-vehicle audio/video system
JP2003319288A (ja) * 2002-04-22 2003-11-07 Sharp Corp 音声復調回路
KR100484172B1 (ko) * 2002-11-01 2005-04-19 삼성전자주식회사 싱글 튜너를 이용한 ｔｖ 및 ｆｍ 라디오 수신 장치
DE102005051696B3 (de) * 2005-10-28 2007-05-10 Loewe Opta Gmbh Suchverfahren nach TV-Kanälen in einem Rundfunksignal, Empfängerschaltung für ein Fernsehgerät sowie Fernsehgerät mit einer solchen Empfängerschaltung
CN101499808B (zh) * 2008-12-10 2012-11-07 深圳市迪斯普科技有限公司 一种机械调谐广播接收机

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE377418A (it) * 1930-03-12
GB415962A (en) * 1933-04-29 1934-09-06 Philips Nv Improvements in radio receiving sets
GB531653A (en) * 1939-07-28 1941-01-08 Gen Electric Co Ltd Improvements in television receivers
DE1171034B (de) * 1953-10-13 1964-05-27 Daimler Benz Ag Rundfunkempfangsgeraet mit automatischem Transport des Stationssuchers
US3886457A (en) * 1973-04-02 1975-05-27 Danny A Petaja Level compensated frequency selector
GB1364325A (en) * 1973-04-04 1974-08-21 Rank Organisation Ltd Combined signal selection and level adjustment control
JPS51117510A (en) * 1975-04-07 1976-10-15 Shintou Denki Kk Double superheterodyne receiver
JPS5823972B2 (ja) * 1975-05-30 1983-05-18 三洋電機株式会社 多バンドデイジタルシンセサイザ受信機
US4162451A (en) * 1977-07-05 1979-07-24 Texas Instruments Incorporated MESFET-device surface-wave-device channel selector
JPS5934035B2 (ja) * 1978-10-19 1984-08-20 ヤマハ株式会社 受信機の多重変調波復調回路
JPS5847100B2 (ja) * 1979-01-10 1983-10-20 松下電器産業株式会社 選局装置
US4286288A (en) * 1979-05-25 1981-08-25 Teleprompter Corporation Apparatus and method for tamper resistant channel attenuation in subscription television converter
US4352111A (en) * 1981-01-26 1982-09-28 Rca Corporation Multi-band antenna coupling network
US4553264A (en) * 1982-09-17 1985-11-12 Matsushita Electric Industrial Co., Ltd. Double superheterodyne tuner
US4575761A (en) * 1983-04-28 1986-03-11 Rca Corporation AFT arrangement for a double conversion tuner
US4499602A (en) * 1983-06-28 1985-02-12 Rca Corporation Double conversion tuner for broadcast and cable television channels
US4581643A (en) * 1983-07-25 1986-04-08 Rca Corporation Double conversion television tuner with frequency response control provisions
US4726072A (en) * 1983-07-28 1988-02-16 Matsushita Electric Industrial Co., Ltd. Double converter tuner
US4574308A (en) * 1984-04-20 1986-03-04 Dell-Star Corporation FM Video receiver
JPS60251724A (ja) * 1984-05-29 1985-12-12 Pioneer Electronic Corp 番組識別受信機
JPS61111032A (ja) * 1984-11-05 1986-05-29 Yuniden Kk 受信機器における受信周波数帯弁別方法
US4627100A (en) * 1984-12-28 1986-12-02 Regency Electronics, Inc. Wide band radio receiver
JPH0614501Y2 (ja) * 1985-04-26 1994-04-13 シャープ株式会社 Ｃａｔｖ用コンバ−タにおけるバンドパスフィルタ
JPS63242030A (ja) * 1987-03-30 1988-10-07 Toshiba Corp 広帯域周波数シンセサイザ受信機
GB2214757A (en) * 1988-01-22 1989-09-06 Philips Electronic Associated Signal distribution network
JPH0223724A (ja) * 1988-07-13 1990-01-25 Alpine Electron Inc 全世界対応ラジオ受信機
FR2637139A1 (fr) * 1988-09-30 1990-03-30 Astec Int Ltd Ensemble d'accord d'audiofrequences pour stations terrestres
US4903129A (en) * 1989-04-06 1990-02-20 Thomson Consumer Electronics, Inc. Audio signal section apparatus
US5115317A (en) * 1989-12-22 1992-05-19 Alps Electric Co., Ltd. Tuning apparatus for a television receiver including selectively activated amplifier and local oscillator circuits
US5144440A (en) * 1990-08-06 1992-09-01 Thomson Consumer Electronics, Inc. National weather radio reception by synthesizing only center frequency

Also Published As

Publication number Publication date
US5361406A (en) 1994-11-01
GB9124088D0 (en) 1992-01-02
JPH04302225A (ja) 1992-10-26
GB2251995B (en) 1994-11-02
CN1027781C (zh) 1995-03-01
MY108617A (en) 1996-10-31
CN1062248A (zh) 1992-06-24
KR100210312B1 (ko) 1999-07-15
DE4136471A1 (de) 1992-05-21
GB2251995A (en) 1992-07-22
ITMI913006A1 (it) 1993-05-12
KR920011093A (ko) 1992-06-27
ITMI913006A0 (it) 1991-11-12
JP3175093B2 (ja) 2001-06-11

Similar Documents

Publication Publication Date Title
US6208636B1 (en) Apparatus and method for processing signals selected from multiple data streams
EP0512374B1 (en) Audio level equalization of television sound, broadcast FM and national weather service FM radio signals
IT1252384B (it) Equalizzazione dei livelli audio di radiosegnali fm a diffusione circolare e di radiosegnali fm a limitata deviazione di frequenza
MY110935A (en) Using a first if of 43.5 mhz or less in an fm radio in a television tuner.
MY106076A (en) Stereo fm radio in a television receiver
US3919645A (en) AM/FM radio receiver
KR920005620A (ko) 텔레비젼 수상기에서 fm수신을 위한 텔레비젼 튜너의 고정 rf자동 이득 제어 시스템
MY107888A (en) Fm trap for a television tuner permitting both tv and fm reception through the same tuner.
MY107498A (en) Interrupting the video if signal path during fm radio mode in a television receiver.
MY107630A (en) Mono fm radio in a television receiver.
MY105434A (en) First if filter with fixed second half-if the trap for use in an fm radio in a television receiver.
MY106098A (en) National weather radio receiver
US4518997A (en) Demodulator having two phase shift networks for wide band television audio
KR960004403Y1 (ko) 위성방송 무선수신 시스템
JPH0217776A (ja) 共聴システム
EP1267488A3 (en) Automatically adjusted AGC take over point
JP2564750Y2 (ja) 衛星放送受信用チューナ装置
JPS6367366B2 (it)
JPH0110025Y2 (it)
US2361669A (en) Frequency modulation receiver
KR900010358Y1 (ko) 음성 다중 및 스테레오 수신 장치의 스위칭 회로
KR900002298Y1 (ko) 복합신호레벨 증폭회로
KR980013296A (ko) TV 무선 청취 시스템 (Wireless listening system for Television)
JPS57180216A (en) Agc circuit for television receiver
JPH0526837Y2 (it)

Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19971126