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GB874126A - Improvements in or relating to cathode ray tube circuits - Google Patents

Improvements in or relating to cathode ray tube circuits

Info

Publication number
GB874126A
GB874126A GB3080458A GB3080458A GB874126A GB 874126 A GB874126 A GB 874126A GB 3080458 A GB3080458 A GB 3080458A GB 3080458 A GB3080458 A GB 3080458A GB 874126 A GB874126 A GB 874126A
Authority
GB
United Kingdom
Prior art keywords
cathode
potential
circuitry
grid
circuit
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
GB3080458A
Inventor
Derek Raymond Burrows
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.)
Bush and Rank Cintel Ltd
Original Assignee
Bush and Rank Cintel 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 Bush and Rank Cintel Ltd filed Critical Bush and Rank Cintel Ltd
Priority to GB3080458A priority Critical patent/GB874126A/en
Publication of GB874126A publication Critical patent/GB874126A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/20—Prevention of damage to cathode-ray tubes in the event of failure of scanning

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Abstract

874,126. Cathode-ray tube circuits. BUSH & RANK CINTEL Ltd. Sept. 24, 1959 [Sept. 26, 1958], No. 30804/58. Class 40(7) A circuit for preventing burning of a cathoderay tube screen due to the occurrence of beam current on switching off the equipment comprises at least one diode, shunted by a resistor, connected between a source of potential and the cathode, and a capacitor returning the cathode to a source of constant potential, it being so arranged that the time constant of this circuitry greatly exceeds that of the grid circuitry. The supply 6 feeds both the anode voltage source 2 and the time-base unit 7. The cathode of the tube has associated with it circuitry as shown or, in order that the high insulation capacitor 11 may be replaced by an electrolytic capacitor, two diodes in series are substituted for diode 10 and their common junction taken to earth through the electrolytic capacitor. The time constant of the grid circuit being much less than that of the cathode circuit, at switch-off the grid falls rapidly to earth potential whereas the cathode potential falls only slowly so that the electron beam is immediately cut off.
GB3080458A 1958-09-26 1958-09-26 Improvements in or relating to cathode ray tube circuits Expired GB874126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3080458A GB874126A (en) 1958-09-26 1958-09-26 Improvements in or relating to cathode ray tube circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3080458A GB874126A (en) 1958-09-26 1958-09-26 Improvements in or relating to cathode ray tube circuits

Publications (1)

Publication Number Publication Date
GB874126A true GB874126A (en) 1961-08-02

Family

ID=10313387

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3080458A Expired GB874126A (en) 1958-09-26 1958-09-26 Improvements in or relating to cathode ray tube circuits

Country Status (1)

Country Link
GB (1) GB874126A (en)

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