GB999473A - Improvements in or relating to deflection systems for cathode ray tubes - Google Patents

Improvements in or relating to deflection systems for cathode ray tubes

Info

Publication number
GB999473A
GB999473A GB2447660A GB2447660A GB999473A GB 999473 A GB999473 A GB 999473A GB 2447660 A GB2447660 A GB 2447660A GB 2447660 A GB2447660 A GB 2447660A GB 999473 A GB999473 A GB 999473A
Authority
GB
United Kingdom
Prior art keywords
line
switch
windings
circuit
frequency
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
GB2447660A
Inventor
Gunars Berzins
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.)
Communications Patents Ltd
Original Assignee
Communications Patents 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 Communications Patents Ltd filed Critical Communications Patents Ltd
Priority to GB2447660A priority Critical patent/GB999473A/en
Publication of GB999473A publication Critical patent/GB999473A/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
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
    • 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
    • H04N3/18—Generation of supply voltages, in combination with electron beam deflecting

Landscapes

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

Abstract

999,473. Valve sawtooth circuits. COMMUNICATIONS PATENTS Ltd. Oct. 11, 1961 [July 13, 1960], No. 24476/60. Heading H3P. In television apparatus for operation on more than one line frequency, transient oscillation is minimized by an additional winding or windings L3, L4 brought into circuit at the higher line frequency. As shown, the deflection coils 4 are connected by switch 3 to point 6 for 405-line operation or to point 8 for 625-line operation. The line oscillator frequency is changed by a further switch (not shown) ganged to switch 3. The leakage inductance of the e.h.t. winding L2 is tuned to the third harmonic of the resonant frequency under flyback conditions, the tuning being changed by windings L3, L4, brought into circuit by switch 2 when operating at 625 lines. Transient oscillation is thus minimized. A rectangular-yoke, gapped-core transformer is specified. One of the windings L3, L4 may be omitted. Tappings may be provided on L3, L4 for operation on other line frequencies. A pulse may be obtained from lead 10 to control a flywheel synchronizing circuit. A resistor 11 may be included to maintain constant the e.h.t. Voltage, obtained from rectifier V3, at the different line frequencies.
GB2447660A 1960-07-13 1960-07-13 Improvements in or relating to deflection systems for cathode ray tubes Expired GB999473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2447660A GB999473A (en) 1960-07-13 1960-07-13 Improvements in or relating to deflection systems for cathode ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2447660A GB999473A (en) 1960-07-13 1960-07-13 Improvements in or relating to deflection systems for cathode ray tubes

Publications (1)

Publication Number Publication Date
GB999473A true GB999473A (en) 1965-07-28

Family

ID=10212290

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2447660A Expired GB999473A (en) 1960-07-13 1960-07-13 Improvements in or relating to deflection systems for cathode ray tubes

Country Status (1)

Country Link
GB (1) GB999473A (en)

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