ES2086451T3 - Circuito de sincronismo. - Google Patents

Circuito de sincronismo.

Info

Publication number
ES2086451T3
ES2086451T3 ES91116512T ES91116512T ES2086451T3 ES 2086451 T3 ES2086451 T3 ES 2086451T3 ES 91116512 T ES91116512 T ES 91116512T ES 91116512 T ES91116512 T ES 91116512T ES 2086451 T3 ES2086451 T3 ES 2086451T3
Authority
ES
Spain
Prior art keywords
time intervals
counter
synchronization
pulses
phase
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
ES91116512T
Other languages
English (en)
Inventor
Donald Henry Willis
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.)
Technicolor USA Inc
Original Assignee
Thomson Consumer Electronics Inc
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 Inc filed Critical Thomson Consumer Electronics Inc
Application granted granted Critical
Publication of ES2086451T3 publication Critical patent/ES2086451T3/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
    • H04N5/04—Synchronising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
    • H03L7/0991—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop the oscillator being a digital oscillator, e.g. composed of a fixed oscillator followed by a variable frequency divider
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
    • H04N5/126—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal indirectly commands a frequency generator

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Synchronizing For Television (AREA)

Abstract

UN CIRCUITO DE BUCLE CERRADO DE FASE (10) REGENERA UNA SEÑAL DE SINCRONIZACION. UN PRIMER CONTADOR (36) CUENTA LOS INTERVALOS DE TIEMPO AJUSTABLES Y FIJOS. UN "FLIP/FLOP" (38) GENERA PULSOS DE SINCRONIZACION QUE TIENEN PERIODOS DEFINIDOS MEDIANTE CONJUNTOS DE INTERVALOS DE TIEMPO FIJOS Y AJUSTABLES. UN SEGUNDO CONTADOR (12) MIDE SUCESIVAMENTE LAS DIFERENCIAS DE FASE ENTRE LOS PULSOS DE SINCRONIZACION Y LOS PULSOS DE ENTRADA RELACIONADOS CON UN COMPONENTE DE SINCRONIZACION EN UNA SEÑAL DE VIDEO. LAS DIFERENCIAS DE FASE SE MIDEN ENTRE LOS EXTREMOS DE LOS INTERVALOS DE TIEMPO AJUSTABLES EN LOS PULSOS DE SINCRONIZACION Y LOS PULSOS DE ENTRADA. CADA UNA DE LAS MEDIDAS DE FASE DA COMO RESULTADO UN VALOR DE CORRECCION DE PERIODO PARA CONTROLAR LA DURACION O EL PERIODO MAS PROXIMO DE LOS INTERVALOS DE TIEMPO AJUSTABLES. EL SEGUNDO CONTADOR (12) SE PONE A CERO EN LOS EXTREMOS DE LOS INTERVALOS DE TIEMPO FIJADOS. UNA RED QUE DEFINE UN FILTRO DE BUCLE PUEDE COMPRENDER UN ACUMULADOR (16, 18, 20), UN CIRCUITO DE MULTIPLICACION DE PULSOS (22), UN SUMADOR (24) Y UN SEGUNDO CIRCUITO MULTIPLICADOR DE PULSOS (26) PARA CALCULAR LAS MEDIDAS DE LA DIFERENCIA DE FASE PONDERADA PARA DEFINIR LOS VALORES DE CORRECCION DE PERIODO. UN MULTIPLEXOR (30) QUE RESPONDE A LOS PULSOS DE SINCRONIZACION EFECTUA UNA SELECCION ENTRE LOS VALORES DE CORRECCION DE PERIODO Y UN VALOR CONSTANTE COMO VALOR DE SALIDA PARA DETERMINAR CUANDO EL PRIMER CONTADOR (36) SE HA PUESTO A CERO
ES91116512T 1990-10-03 1991-09-27 Circuito de sincronismo. Expired - Lifetime ES2086451T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/592,393 US5162910A (en) 1990-10-03 1990-10-03 Synchronizing circuit

Publications (1)

Publication Number Publication Date
ES2086451T3 true ES2086451T3 (es) 1996-07-01

Family

ID=24370471

Family Applications (1)

Application Number Title Priority Date Filing Date
ES91116512T Expired - Lifetime ES2086451T3 (es) 1990-10-03 1991-09-27 Circuito de sincronismo.

Country Status (11)

Country Link
US (1) US5162910A (es)
EP (1) EP0479142B1 (es)
JP (1) JP3379585B2 (es)
KR (1) KR100274527B1 (es)
CN (1) CN1040602C (es)
DE (1) DE69119345T2 (es)
ES (1) ES2086451T3 (es)
MY (1) MY109239A (es)
PT (1) PT99141B (es)
SG (1) SG89223A1 (es)
TR (1) TR28000A (es)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3327397B2 (ja) * 1991-03-12 2002-09-24 ソニー株式会社 偏向補正波形発生回路
US5610560A (en) * 1993-04-20 1997-03-11 Rca Thomson Licensing Corporation Oscillator with switched reactive elements
US5574406A (en) * 1993-04-20 1996-11-12 Rca Thomson Licensing Corporation Phase lock loop with error measurement and correction in alternate periods
US5574407A (en) * 1993-04-20 1996-11-12 Rca Thomson Licensing Corporation Phase lock loop with error consistency detector
US5614870A (en) * 1993-04-20 1997-03-25 Rca Thomson Licensing Corporation Phase lock loop with idle mode of operation during vertical blanking
KR960012921B1 (ko) * 1993-10-06 1996-09-25 현대전자산업 주식회사 위상 록 루프 회로
US5444743A (en) * 1993-11-18 1995-08-22 Hitachi America, Ltd. Synchronous pulse generator
JPH0818817A (ja) * 1994-06-30 1996-01-19 Mitsubishi Denki Semiconductor Software Kk 水平同期信号生成回路
US5754251A (en) * 1995-12-12 1998-05-19 Trw Inc. Digital video vertical synchronization pulse detector
US6316974B1 (en) 2000-08-26 2001-11-13 Rgb Systems, Inc. Method and apparatus for vertically locking input and output signals
WO2006120000A1 (de) * 2005-05-11 2006-11-16 Hirschmann Car Communication Gmbh Verfahren zur verbesserung der bildstabilität bei mobilem analogen tv-empfang
JP2007165955A (ja) * 2005-12-09 2007-06-28 Oki Electric Ind Co Ltd 垂直同期信号生成装置
US7414448B2 (en) * 2006-08-14 2008-08-19 Etron Technology Inc. Duty cycle correction circuit
US8809759B2 (en) * 2011-10-11 2014-08-19 Omnivision Technologies, Inc. Multiple-row concurrent readout scheme for high-speed CMOS image sensor with backside illumination
DE102015211260A1 (de) 2015-06-18 2016-12-22 Robert Bosch Gmbh Verfahren und Vorrichtung zur Bestimmung eines Sensorsignals

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE414104B (sv) * 1978-10-13 1980-07-07 Ellemtel Utvecklings Ab Digital faslast slinga
US4280099A (en) * 1979-11-09 1981-07-21 Sperry Corporation Digital timing recovery system
DE3025356A1 (de) * 1980-07-04 1982-01-21 Deutsche Itt Industries Gmbh, 7800 Freiburg Schaltungsanordnung zur digitalen phasendifferenz-messung, deren verwendung in einer synchronisierschaltung und entsprechende synchronisierschaltung
DE3027828A1 (de) * 1980-07-23 1982-03-04 Deutsche Itt Industries Gmbh, 7800 Freiburg Frequenz/phasenregelschleife
US4380742A (en) * 1980-08-04 1983-04-19 Texas Instruments Incorporated Frequency/phase locked loop circuit using digitally controlled oscillator
US4396991A (en) * 1981-04-07 1983-08-02 Honeywell Information Systems Inc. Long term response enhancement for digital phase-locked loop
US4462110A (en) * 1981-04-07 1984-07-24 Honeywell Information Systems Inc. Digital phase-locked loop
US4400664A (en) * 1981-05-26 1983-08-23 Motorola, Inc. Digital phase detector
NL8103437A (nl) * 1981-07-21 1983-02-16 Philips Nv Synchroniseerschakeling voor een televisie-ontvanger.
US4466111A (en) * 1981-11-27 1984-08-14 Gte Products Corporation Synchronization apparatus and method
US4639780A (en) * 1985-04-01 1987-01-27 Rca Corporation Television synchronizing apparatus
US4636861A (en) * 1985-04-01 1987-01-13 Rca Corporation Two-loop line deflection system
US4769704A (en) * 1985-06-04 1988-09-06 Matsushita Electric Industrial Co., Ltd. Synchronization signal generator
IT1184024B (it) * 1985-12-17 1987-10-22 Cselt Centro Studi Lab Telecom Perfezionamenti ai circuiti ad aggancio di fase numerici
US4680780A (en) * 1986-05-01 1987-07-14 Tektronix, Inc. Clock recovery digital phase-locked loop
EP0254763B1 (de) * 1986-07-31 1991-01-23 Deutsche ITT Industries GmbH Digitale Horizontalablenkschaltung
US4689582A (en) * 1986-10-27 1987-08-25 Rca Corporation Phase-lock-loop circuit for a television apparatus
US4775890A (en) * 1987-06-11 1988-10-04 Rca Licensing Corporation Phase detector
US4769705A (en) * 1987-06-30 1988-09-06 Rca Licensing Corporation Deflection synchronizing apparatus

Also Published As

Publication number Publication date
PT99141B (pt) 1999-01-29
CN1060942A (zh) 1992-05-06
DE69119345T2 (de) 1996-12-05
EP0479142B1 (en) 1996-05-08
SG89223A1 (en) 2002-06-18
EP0479142A3 (en) 1992-05-27
PT99141A (pt) 1993-10-29
EP0479142A2 (en) 1992-04-08
KR920009184A (ko) 1992-05-28
CN1040602C (zh) 1998-11-04
MY109239A (en) 1996-12-31
JPH0522624A (ja) 1993-01-29
US5162910A (en) 1992-11-10
KR100274527B1 (ko) 2000-12-15
DE69119345D1 (de) 1996-06-13
JP3379585B2 (ja) 2003-02-24
TR28000A (tr) 1995-11-07

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