SE7908091L - Horizontal deflection synchronization circuit with two phase control circuits - Google Patents

Horizontal deflection synchronization circuit with two phase control circuits

Info

Publication number
SE7908091L
SE7908091L SE7908091A SE7908091A SE7908091L SE 7908091 L SE7908091 L SE 7908091L SE 7908091 A SE7908091 A SE 7908091A SE 7908091 A SE7908091 A SE 7908091A SE 7908091 L SE7908091 L SE 7908091L
Authority
SE
Sweden
Prior art keywords
phase
horizontal
coupled
frequency
bilevel signal
Prior art date
Application number
SE7908091A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE440436B (en
Inventor
A R Balaban
S A Steckler
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
Application filed by Rca Corp filed Critical Rca Corp
Publication of SE7908091L publication Critical patent/SE7908091L/en
Publication of SE440436B publication Critical patent/SE440436B/en

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)
  • Details Of Television Scanning (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

A television horizontal deflection synchronizing system uses two phase- lock loops (30, 70). A horizontal oscillator (32) operating at a frequency greater than the horizontal frequency is counted and a bilevel signal near the horizontal frequency is generated. A first phase-lock loop (30) having a relatively long time constant controls the oscillator (32) to maintain the bilevel signal in frequency and phase synchronism with horizontal synchronizing signals. In order to compensate for load-dependent variations in the delay of the horizontal deflection stage, a second phase-lock loop (70) is used. The second phase-lock loop (70) includes a phase detector, (92) one input of which is coupled to an output of the first phase-lock loop (30) and a second input of which is coupled to the deflection circuit (140) for responding to the retrace pulse for enabling the phase detector (92) to produce a current of a first polarity when the bilevel signal has a first value and a current of a second polarity when the bilevel signal has a second value. A loop filter (120) is coupled to an output of the phase detector for filtering the first and second polarity currents to form a control signal. A phase controllable source (72) includes a control input coupled to the loop filter (120) for producing horizontal-rate drive pulses at a time which makes the retrace pulses synchronous with the bilevel signal. <IMAGE>
SE7908091A 1978-10-05 1979-09-28 HORIZONTAL SYNCHRONIZATION DEVICE FOR A TELEVISION IMAGE DEVICE SE440436B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US94877578A 1978-10-05 1978-10-05

Publications (2)

Publication Number Publication Date
SE7908091L true SE7908091L (en) 1980-04-06
SE440436B SE440436B (en) 1985-07-29

Family

ID=25488242

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7908091A SE440436B (en) 1978-10-05 1979-09-28 HORIZONTAL SYNCHRONIZATION DEVICE FOR A TELEVISION IMAGE DEVICE

Country Status (13)

Country Link
JP (1) JPS5854545B2 (en)
AT (1) AT382990B (en)
AU (1) AU522723B2 (en)
DE (1) DE2940461C2 (en)
ES (1) ES484745A1 (en)
FI (1) FI71049C (en)
FR (1) FR2438396A1 (en)
GB (1) GB2034137B (en)
IT (1) IT1123415B (en)
MY (1) MY8500721A (en)
NZ (1) NZ191751A (en)
PL (1) PL123959B1 (en)
SE (1) SE440436B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5752268A (en) * 1980-09-12 1982-03-27 Sanyo Electric Co Ltd Horizontal synchronizing circuit
US4317133A (en) * 1980-09-29 1982-02-23 Rca Corporation Two-loop horizontal AFPC system
JPS5752271A (en) * 1980-11-12 1982-03-27 Sanyo Electric Co Ltd Horizontal synchronizing circuit
US4396948A (en) * 1981-02-11 1983-08-02 Rca Corporation Dual mode horizontal deflection circuit
FR2504763B1 (en) * 1981-04-27 1985-07-05 Thomson Csf TELEVISION SCANNING CONTROL CIRCUIT
NL8103705A (en) * 1981-08-06 1983-03-01 Philips Nv LINE SYNCHRONIZER FOR AN IMAGE DISPLAY.
US4510527A (en) * 1983-03-28 1985-04-09 Rca Corporation Horizontal deflection phasing arrangement
US4639780A (en) * 1985-04-01 1987-01-27 Rca Corporation Television synchronizing apparatus
US4769705A (en) * 1987-06-30 1988-09-06 Rca Licensing Corporation Deflection synchronizing apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891800A (en) * 1971-03-16 1975-06-24 Philips Corp Line time base in a television receiver
US3730989A (en) * 1971-12-13 1973-05-01 Gte Sylvania Inc Television horizontal transistor oscillator and afc network
US4047223A (en) * 1976-01-16 1977-09-06 Zenith Radio Corporation Frequency scanning automatic phase control system
JPS5299054A (en) * 1976-02-16 1977-08-19 Hitachi Ltd Phase locked loop circuit
NL7714033A (en) * 1977-12-19 1979-06-21 Philips Nv TELEVISION RECEIVER WITH A LINE SYNCHRONIZE CIRCUIT.

Also Published As

Publication number Publication date
GB2034137A (en) 1980-05-29
IT1123415B (en) 1986-04-30
SE440436B (en) 1985-07-29
FI71049B (en) 1986-07-18
FI71049C (en) 1986-10-27
FR2438396B1 (en) 1984-06-22
PL123959B1 (en) 1982-12-31
FI793025A7 (en) 1980-04-06
ES484745A1 (en) 1980-04-16
GB2034137B (en) 1982-10-27
JPS5550779A (en) 1980-04-12
IT7926190A0 (en) 1979-10-02
JPS5854545B2 (en) 1983-12-05
NZ191751A (en) 1983-05-10
ATA652779A (en) 1986-09-15
PL218729A1 (en) 1980-08-11
FR2438396A1 (en) 1980-04-30
DE2940461A1 (en) 1980-04-10
AU5129279A (en) 1980-04-17
AT382990B (en) 1987-05-11
MY8500721A (en) 1985-12-31
DE2940461C2 (en) 1982-05-19
AU522723B2 (en) 1982-06-24

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