ES2065930T5 - Control automatico de frecuencia. - Google Patents

Control automatico de frecuencia.

Info

Publication number
ES2065930T5
ES2065930T5 ES89104874T ES89104874T ES2065930T5 ES 2065930 T5 ES2065930 T5 ES 2065930T5 ES 89104874 T ES89104874 T ES 89104874T ES 89104874 T ES89104874 T ES 89104874T ES 2065930 T5 ES2065930 T5 ES 2065930T5
Authority
ES
Spain
Prior art keywords
television signal
detector
component
output
oscillator
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
ES89104874T
Other languages
English (en)
Other versions
ES2065930T3 (es
Inventor
Daniel J Marz
John D Schilling
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.)
Arris Technology Inc
Original Assignee
Arris Technology Inc
General Instrument Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22730087&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2065930(T5) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Arris Technology Inc, General Instrument Corp filed Critical Arris Technology Inc
Publication of ES2065930T3 publication Critical patent/ES2065930T3/es
Application granted granted Critical
Publication of ES2065930T5 publication Critical patent/ES2065930T5/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Television Receiver Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • General Induction Heating (AREA)
  • Amplifiers (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

UN CONTROL AUTOMATICO DE FRECUENCIA DIRIGE UNA SEÑAL TELEVISIVA ANTES Y DESPUES UN PERIODO DE INTERRUPCION. EL CONTROL AUTOMATICO DE FRECUENCIA COMPRENDE UN CIRCUITO CERRADO DE REACCION DE VOLTAJE CONTROLADA QUE INCLUYE UN OSCILADOR LOCAL DE VOLTAJE CONTROLADO Y UN MEZCLADOR PARA MEZCLAR LA SALIDA DEL OSCILADOR CON LA SEÑAL DE TELEVISION. LA SALIDA DEL MEZCLADOR ES FILTRADA PARA EXTRAER UNOS COMPONENETES NO ESPERADOS DE LA SEÑAL MEZCLADA Y EQUALIZAR LAS BANDAS DE LA SEÑAL DE TELEVISION. LA SALIDA DEL FILTRO ES SUSTITUIDA A UN DETECTOR, EL CUAL ES SINTONIZADO A UN COMPONENTE DE LA SEÑAL DE TELEVISION Y PRODUCE UN VOLTAJE QUE CORRESPONDE A LA FRECUENCIA DEL COMPONENTE, LA SALIDA DEL DETECTOR ES SUSTITUIDA A LA ENTRADA DE CONTROL DEL VOLTAJE EN EL OSCILADOR LOCAL PARA DIRIGIR EL COMPONENTE SEÑAL DE TELEVISION. LA CIRCUITERIA AUTOMATICAMENTE CAPTA LA AUSENCIA DEL COMPONENTE DE SEÑAL DE TELEVISION. EL MEZCLADOR Y AUTOMATICAMENTE APLICA UNA REFERENCIA DE VOLTAJE A LA ENTRADA DE CONTROL DE VOLTAJE DEL OSCILADOR CUANDO LOS COMPONENTES DE LA SEÑAL DE TELEVISION ESTAN AUSENTES. EL DETECTOR OPERA PARA DETECTAR LOS COMPONENTES DE LA SEÑAL DE TELEVISION QUE SIGUEN LA APLICACION DE REFERENCIA DE VOLTAJE AL OSCILADOR, ASI QUE CUANDO LA SEÑAL DE TELEVISION VUELVE, EL DETECTOR ES CAPAZ DE DIRIGIR ESTA.
ES89104874T 1988-05-23 1989-03-18 Control automatico de frecuencia. Expired - Lifetime ES2065930T5 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/197,616 US4814887A (en) 1988-05-23 1988-05-23 Automatic frequency control

Publications (2)

Publication Number Publication Date
ES2065930T3 ES2065930T3 (es) 1995-03-01
ES2065930T5 true ES2065930T5 (es) 2000-04-16

Family

ID=22730087

Family Applications (1)

Application Number Title Priority Date Filing Date
ES89104874T Expired - Lifetime ES2065930T5 (es) 1988-05-23 1989-03-18 Control automatico de frecuencia.

Country Status (12)

Country Link
US (1) US4814887A (es)
EP (1) EP0343336B2 (es)
JP (1) JP2948825B2 (es)
AT (1) ATE115789T1 (es)
CA (1) CA1308188C (es)
DE (1) DE68919905T3 (es)
DK (1) DK140089A (es)
ES (1) ES2065930T5 (es)
GR (1) GR3015406T3 (es)
HK (1) HK179995A (es)
IE (1) IE61864B1 (es)
NO (1) NO173970C (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0724813Y2 (ja) * 1988-02-26 1995-06-05 株式会社東芝 電子同調チューナの電圧重畳回路
GB2217935A (en) * 1988-04-27 1989-11-01 Philips Electronic Associated Television receiving apparatus
US5125106A (en) * 1989-03-31 1992-06-23 Matsushita Electric Industrial Co., Ltd. Switching control apparatus for tuning system
JPH0340333A (ja) * 1989-07-05 1991-02-21 Matsushita Electric Ind Co Ltd チューナ選局装置
US5248876A (en) * 1992-04-21 1993-09-28 International Business Machines Corporation Tandem linear scanning confocal imaging system with focal volumes at different heights
KR100255726B1 (ko) * 1993-03-31 2000-05-01 윤종용 자동 주파수 제어방법 및 장치
US5572264A (en) * 1994-02-14 1996-11-05 Hitachi, Ltd. High definition TV signal receiver
JP4325490B2 (ja) * 2004-06-10 2009-09-02 株式会社デンソー ヘテロダイン受信機
US8385855B2 (en) * 2008-11-07 2013-02-26 Viasat, Inc. Dual conversion transmitter with single local oscillator
TWI410057B (zh) * 2009-05-05 2013-09-21 Richwave Technology Corp 頻率調變接收機與其接收方法
US8432498B2 (en) * 2010-10-20 2013-04-30 Stmicroelectronics Asia Pacific Pte Ltd. Automatic frequency selection for peaking

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980951A (en) * 1975-08-13 1976-09-14 Fairchild Camera And Instrument Corporation Electronic tuning control system for television
US4214274A (en) * 1978-06-19 1980-07-22 Matsushita Electric Corporation Frequency synthesizer tuning system with variable dwell signal seek
JPS5563118A (en) * 1978-11-02 1980-05-13 Sony Corp Aft circuit
US4263611A (en) * 1979-08-29 1981-04-21 Rca Corporation Television signal processing system
US4291413A (en) * 1979-09-28 1981-09-22 Rca Corporation Search type tuning system with direct address channel selection apparatus
US4392254A (en) * 1980-09-29 1983-07-05 Motorola Inc. Mechanical tuner with microphonics elimination circuitry
JPS5957534A (ja) * 1982-09-27 1984-04-03 Alps Electric Co Ltd 衛星放送用受信器の屋内ユニツト
US4575761A (en) * 1983-04-28 1986-03-11 Rca Corporation AFT arrangement for a double conversion tuner
JPS59215113A (ja) * 1983-05-23 1984-12-05 Victor Co Of Japan Ltd テレビジヨン信号受信装置のａｆｃ回路
JPS60236316A (ja) * 1984-05-10 1985-11-25 Pioneer Electronic Corp テレビジヨン受像機の選局方法
JPS60236318A (ja) * 1984-05-10 1985-11-25 Pioneer Electronic Corp テレビジヨン受像機の選局方法
JPS60236317A (ja) * 1984-05-10 1985-11-25 Pioneer Electronic Corp テレビジヨン受像機の選局方法
JPH0759060B2 (ja) * 1985-06-14 1995-06-21 株式会社日立製作所 Ｆｍテレビジョン受信装置
JPS6268313A (ja) * 1985-09-20 1987-03-28 Alps Electric Co Ltd Ｃａｔｖコンバ−タ
EP0302290B1 (en) * 1987-08-03 1994-12-14 Motorola Inc. Automatic frequency control system

Also Published As

Publication number Publication date
IE890863L (en) 1989-11-23
US4814887A (en) 1989-03-21
JP2948825B2 (ja) 1999-09-13
IE61864B1 (en) 1994-11-30
DK140089A (da) 1989-11-24
EP0343336B1 (en) 1994-12-14
EP0343336B2 (en) 1999-12-15
DE68919905T3 (de) 2000-07-27
ES2065930T3 (es) 1995-03-01
NO173970B (no) 1993-11-15
EP0343336A3 (en) 1990-12-27
NO173970C (no) 1994-02-23
GR3015406T3 (en) 1995-06-30
HK179995A (en) 1995-12-01
ATE115789T1 (de) 1994-12-15
NO891203D0 (no) 1989-03-20
DK140089D0 (da) 1989-03-21
CA1308188C (en) 1992-09-29
NO891203L (no) 1989-11-24
JPH0223709A (ja) 1990-01-25
DE68919905D1 (de) 1995-01-26
DE68919905T2 (de) 1995-07-13
EP0343336A2 (en) 1989-11-29

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