GB867435A - Improvements in or relating to time-base circuits for magnetic beam deflection - Google Patents

Improvements in or relating to time-base circuits for magnetic beam deflection

Info

Publication number
GB867435A
GB867435A GB2820259A GB2820259A GB867435A GB 867435 A GB867435 A GB 867435A GB 2820259 A GB2820259 A GB 2820259A GB 2820259 A GB2820259 A GB 2820259A GB 867435 A GB867435 A GB 867435A
Authority
GB
United Kingdom
Prior art keywords
winding
capacitor
deflection coils
ray tube
cathode
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
GB2820259A
Inventor
Kenneth Edward Martin
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.)
Philips Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB2820259A priority Critical patent/GB867435A/en
Publication of GB867435A publication Critical patent/GB867435A/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
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/90—Linearisation of ramp; Synchronisation of pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

867,435. Valve or transistor sawtooth circuits; cathode-ray tube circuits. MULLARD Ltd. Aug. 18, 1959, No. 28202/59. Classes 40(6) and 40(7) In a line time base deflection circuit for a cathode-ray tube, the deflection coils are coupled to an output valve or transistor via an auto transformer having two windings carrying direct current in opposite directions, so as to minimise saturation of the core, the direct current also flowing through the deflection coils to provide centering. As shown, the direct component of the anode current of valve V2 flows via winding 6-5, the efficiency diode V1, winding 1-3, a choke L3a and the deflection coils Lya. H.T. boost is provided by capacitor C2. Capacitor C3a distorts the wave form to permit the use of a 110 degrees flat screen cathode-ray tube. Fig. 4 (not shown) relates to an arrangement in which L3a, C3a are omitted and capacitor Cl is connected either to the top of winding 1-3 or to a tapping in the winding. Fig. 1 (not shown) relates to a known arrangement in which a choke is connected between point 3 and the H.T. line, whilst the deflection coils are connected in series with a capacitor across part of winding 1-3.
GB2820259A 1959-08-18 1959-08-18 Improvements in or relating to time-base circuits for magnetic beam deflection Expired GB867435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2820259A GB867435A (en) 1959-08-18 1959-08-18 Improvements in or relating to time-base circuits for magnetic beam deflection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2820259A GB867435A (en) 1959-08-18 1959-08-18 Improvements in or relating to time-base circuits for magnetic beam deflection

Publications (1)

Publication Number Publication Date
GB867435A true GB867435A (en) 1961-05-10

Family

ID=10271922

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2820259A Expired GB867435A (en) 1959-08-18 1959-08-18 Improvements in or relating to time-base circuits for magnetic beam deflection

Country Status (1)

Country Link
GB (1) GB867435A (en)

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