FR2456441A1 - PHASE LOCKED LOOP DEVICE FOR THE HORIZONTAL OSCILLATOR OF A TELEVISION - Google Patents

PHASE LOCKED LOOP DEVICE FOR THE HORIZONTAL OSCILLATOR OF A TELEVISION

Info

Publication number
FR2456441A1
FR2456441A1 FR8010304A FR8010304A FR2456441A1 FR 2456441 A1 FR2456441 A1 FR 2456441A1 FR 8010304 A FR8010304 A FR 8010304A FR 8010304 A FR8010304 A FR 8010304A FR 2456441 A1 FR2456441 A1 FR 2456441A1
Authority
FR
France
Prior art keywords
oscillator
detector
television
signals
output
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.)
Granted
Application number
FR8010304A
Other languages
French (fr)
Other versions
FR2456441B1 (en
Inventor
Steven Alan Steckler
Alvin Reuben Balaban
Ronald Eugene Fernsler
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.)
RCA Corp
Original Assignee
RCA 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
Priority claimed from US06/037,517 external-priority patent/US4251833A/en
Priority claimed from US06/037,401 external-priority patent/US4245251A/en
Application filed by RCA Corp filed Critical RCA Corp
Publication of FR2456441A1 publication Critical patent/FR2456441A1/en
Application granted granted Critical
Publication of FR2456441B1 publication Critical patent/FR2456441B1/en
Expired 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
    • 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)
  • Synchronizing For Television (AREA)

Abstract

LA PRESENTE INVENTION SE RAPPORTE A UN DISPOSITIF A BOUCLE VERROUILLEE EN PHASE POUR L'OSCILLATEUR HORIZONTAL D'UN TELEVISEUR. SELON L'INVENTION, LA BOUCLE COMPORTE UN DETECTEUR DE PHASE 30 ET UN OSCILLATEUR REGLE 450. LES SIGNAUX DE SYNCHRONISATION SONT APPLIQUES A UNE ENTREE DU DETECTEUR 30 ET LA SORTIE DE L'OSCILLATEUR EST APPLIQUEE A L'AUTRE. LES SIGNAUX A LA SORTIE DE L'OSCILLATEUR PRESENTENT DES TRANSITIONS SUCCESSIVES A DES PREMIERE ET SECONDE POLARITES. LE SIGNAL A LA SORTIE DU DETECTEUR 30 EST REAPPLIQUE A L'ENTREE DE COMMANDE DE L'OSCILLATEUR POUR MAINTENIR SA SORTIE EN SYNCHRONISME DE FREQUENCE. PENDANT LES INTERVALLES DES IMPULSIONS DE SYNCHRONISATION VERTICALE ET D'EGALISATION, LES SIGNAUX DE SYNCHRONISATION APPLIQUES AU DETECTEUR AUGMENTENT EN FREQUENCE. CELA PEUT DIMINUER LE GAIN DE LA BOUCLE. CET EFFET EST SURMONTE EN REGLANT LE COUPLAGE DE L'UN DES SIGNAUX D'OSCILLATEUR OU DE SYNCHRONISATION, AUX BORNES D'ENTREE DU DETECTEUR AFIN QUE LES SIGNAUX DE SYNCHRONISATION SE PRODUISENT EN SYNCHRONISME AVEC LES TRANSITIONS A LA PREMIERE POLARITE DES SIGNAUX D'OSCILLATEUR. L'INVENTION S'APPLIQUE NOTAMMENT A LA TELEVISION.THE PRESENT INVENTION RELATES TO A PHASE LOCKED LOOP DEVICE FOR THE HORIZONTAL OSCILLATOR OF A TELEVISION. ACCORDING TO THE INVENTION, THE LOOP INCLUDES A PHASE DETECTOR 30 AND A SET OSCILLATOR 450. THE TIMING SIGNALS ARE APPLIED TO ONE INPUT OF DETECTOR 30 AND THE OUTPUT OF OSCILLATOR IS APPLIED TO THE OTHER. THE SIGNALS AT THE EXIT OF THE OSCILLATOR SHOW SUCCESSIVE TRANSITIONS TO FIRST AND SECOND POLARITIES. THE SIGNAL AT THE OUTPUT OF DETECTOR 30 IS REAPPLIED TO THE OSCILLATOR CONTROL INPUT TO KEEP ITS OUTPUT IN FREQUENCY SYNCHRONISM. DURING THE INTERVALS OF THE VERTICAL SYNCHRONIZATION AND EQUALIZATION PULSES, THE SYNCHRONIZATION SIGNALS APPLIED TO THE DETECTOR INCREASE IN FREQUENCY. THIS MAY DECREASE THE LOOP GAIN. THIS EFFECT IS OVERCOME BY ADJUSTING THE COUPLING OF ONE OF THE OSCILLATOR OR SYNCHRONIZATION SIGNALS TO THE DETECTOR INPUT TERMINALS SO THAT THE SYNCHRONIZATION SIGNALS OCCUR IN SYNCHRONISM WITH THE TRANSITIONS TO THE FIRST POLARITY OF THE OSCILLATING SIGNALS . THE INVENTION APPLIES IN PARTICULAR TO TELEVISION.

FR8010304A 1979-05-09 1980-05-08 PHASE LOCKED LOOP DEVICE FOR THE HORIZONTAL OSCILLATOR OF A TELEVISION Expired FR2456441B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/037,517 US4251833A (en) 1979-05-09 1979-05-09 Television horizontal AFPC with phase detector driven at twice the horizontal frequency
US06/037,401 US4245251A (en) 1979-05-09 1979-05-09 AFPC Phase detector with no output from alternate sync pulses

Publications (2)

Publication Number Publication Date
FR2456441A1 true FR2456441A1 (en) 1980-12-05
FR2456441B1 FR2456441B1 (en) 1985-12-27

Family

ID=26714097

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8010304A Expired FR2456441B1 (en) 1979-05-09 1980-05-08 PHASE LOCKED LOOP DEVICE FOR THE HORIZONTAL OSCILLATOR OF A TELEVISION

Country Status (4)

Country Link
AT (1) AT383924B (en)
DE (1) DE3017908C2 (en)
FR (1) FR2456441B1 (en)
GB (1) GB2050730B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463558A1 (en) * 1979-08-04 1981-02-20 Philips Nv CIRCUIT FOR SYNCHRONIZING AN OSCILLATOR WITH RESPECT TO A TELEVISION SIGNAL

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4464679A (en) * 1981-07-06 1984-08-07 Rca Corporation Method and apparatus for operating a microprocessor in synchronism with a video signal
US4660080A (en) * 1985-12-24 1987-04-21 Rca Corporation Synchronization circuit responsive to time-multiplexed signals
JPH0528850Y2 (en) * 1987-02-18 1993-07-23
US4855828A (en) * 1988-03-29 1989-08-08 Rca Licensing Corp. Television synchronizing arrangement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688037A (en) * 1970-09-30 1972-08-29 Rca Corp Synchronizing system
US3846584A (en) * 1972-10-09 1974-11-05 Hitachi Ltd Horizontal automatic frequency control circuit
US3878335A (en) * 1973-10-18 1975-04-15 Rca Corp Digital synchronization system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2409166B1 (en) * 1974-02-26 1975-05-28 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig, 8510 Fuerth Line synchronization circuit that is not susceptible to interference and has a low time constant for television receivers
JPS50119520A (en) * 1974-03-02 1975-09-19
JPS51150228A (en) * 1975-06-19 1976-12-23 Victor Co Of Japan Ltd Horizontal afc circuit
US4144544A (en) * 1977-12-19 1979-03-13 Rca Corporation Television horizontal oscillator frequency control arrangement for use with tape recorder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688037A (en) * 1970-09-30 1972-08-29 Rca Corp Synchronizing system
US3846584A (en) * 1972-10-09 1974-11-05 Hitachi Ltd Horizontal automatic frequency control circuit
US3878335A (en) * 1973-10-18 1975-04-15 Rca Corp Digital synchronization system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463558A1 (en) * 1979-08-04 1981-02-20 Philips Nv CIRCUIT FOR SYNCHRONIZING AN OSCILLATOR WITH RESPECT TO A TELEVISION SIGNAL

Also Published As

Publication number Publication date
AT383924B (en) 1987-09-10
ATA250480A (en) 1987-01-15
FR2456441B1 (en) 1985-12-27
GB2050730B (en) 1983-06-15
GB2050730A (en) 1981-01-07
DE3017908C2 (en) 1983-09-08
DE3017908A1 (en) 1980-11-20

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse