GB652023A - Improvements in or relating to synchronised time bases for television and like systems - Google Patents

Improvements in or relating to synchronised time bases for television and like systems

Info

Publication number
GB652023A
GB652023A GB3026548A GB3026548A GB652023A GB 652023 A GB652023 A GB 652023A GB 3026548 A GB3026548 A GB 3026548A GB 3026548 A GB3026548 A GB 3026548A GB 652023 A GB652023 A GB 652023A
Authority
GB
United Kingdom
Prior art keywords
pulses
frequency
television
line frequency
valve
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
Application number
GB3026548A
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.)
Cinema Television Ltd
Original Assignee
Cinema Television Ltd
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 Cinema Television Ltd filed Critical Cinema Television Ltd
Priority to GB3026548A priority Critical patent/GB652023A/en
Priority to FR999556D priority patent/FR999556A/en
Priority to DE1950C0000499 priority patent/DE1657031U/en
Publication of GB652023A publication Critical patent/GB652023A/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
    • H04N5/08—Separation of synchronising signals from picture signals
    • H04N5/10—Separation of line synchronising signal from frame synchronising signal or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Helmets And Other Head Coverings (AREA)

Abstract

652,023. Television. CINEMA-TELEVISION, Ltd., and McCONNELL, E. D. Nov. 22, 1948, No. 30265. [Class 40 (iii)] [Also in Group XL (c)] In a synchronized time base which is required to operate at a given recurrence frequency the incoming synchronizing signals are applied to the grid of a valve the anode of which comprises a circuit which is resonant at the given frequency so that the time base is rendered less sensitive to pulses occurring between those at the given frequency. The Figure shows the application to the line time base of a television receiver. The synchronizing pulses which contain pulses occurring at both line frequency and double line frequency, are applied to synchronize a multivibrator comprising valves 2, 3, the output pulses from which are applied to the saw-tooth current generator 4. Circuit 7 is resonant at line frequency and the damping resistor 9 is adjusted so that the sinusoidal component of the anode voltage of valve 3 prevents this valve from being triggered by double line frequency pulses which occur between the line frequency synchronizing pulses.
GB3026548A 1948-11-22 1948-11-22 Improvements in or relating to synchronised time bases for television and like systems Expired GB652023A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3026548A GB652023A (en) 1948-11-22 1948-11-22 Improvements in or relating to synchronised time bases for television and like systems
FR999556D FR999556A (en) 1948-11-22 1949-11-14 Improvements to synchronized time bases for television or similar systems
DE1950C0000499 DE1657031U (en) 1948-11-22 1950-10-02 TILTING DEVICE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3026548A GB652023A (en) 1948-11-22 1948-11-22 Improvements in or relating to synchronised time bases for television and like systems

Publications (1)

Publication Number Publication Date
GB652023A true GB652023A (en) 1951-04-11

Family

ID=10304907

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3026548A Expired GB652023A (en) 1948-11-22 1948-11-22 Improvements in or relating to synchronised time bases for television and like systems

Country Status (3)

Country Link
DE (1) DE1657031U (en)
FR (1) FR999556A (en)
GB (1) GB652023A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689082A (en) * 1954-09-14 Kolisch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689082A (en) * 1954-09-14 Kolisch

Also Published As

Publication number Publication date
FR999556A (en) 1952-02-01
DE1657031U (en) 1953-06-11

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