GB1067977A - Improvements in or relating to e.h.t. generator circuits - Google Patents

Improvements in or relating to e.h.t. generator circuits

Info

Publication number
GB1067977A
GB1067977A GB1405965A GB1405965A GB1067977A GB 1067977 A GB1067977 A GB 1067977A GB 1405965 A GB1405965 A GB 1405965A GB 1405965 A GB1405965 A GB 1405965A GB 1067977 A GB1067977 A GB 1067977A
Authority
GB
United Kingdom
Prior art keywords
diode
semi
conductor device
current
relating
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
GB1405965A
Inventor
Allen Frederick Newell
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 GB1405965A priority Critical patent/GB1067977A/en
Publication of GB1067977A publication Critical patent/GB1067977A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
    • H03K4/60—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor
    • H03K4/62—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor using a semiconductor device operating as a switching device
    • H03K4/64—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor using a semiconductor device operating as a switching device combined with means for generating the driving pulses
    • 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
    • H03K4/085—Protection of sawtooth generators
    • 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

1,067,977. Scanning circuits. MULLARD Ltd. Feb. 11, 1966 [April 2, 1965], No. 14059/65. Heading H3T. [Also in Division H2] In an e.h.t. generator for a television receiver, current supplied to an inductor TF3 is interrupted by a semi-conductor device T2 and the semi-conductor device is controlled by a drive circuit which includes protection against arcing in the picture tube. An impedance resistor Rl in Fig. 3, or a capacitor (Cb) in Fig. 2 (not shown), carries the e.h.t. current. The control loop shown in heavy line contains a diode Df normally biased to cut-off at all times during normal operation. When excessive current flows in R1, diode Df conducts and suppresses the drive signals for a time dependent on the circuit constants, for example several line periods.
GB1405965A 1965-04-02 1965-04-02 Improvements in or relating to e.h.t. generator circuits Expired GB1067977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1405965A GB1067977A (en) 1965-04-02 1965-04-02 Improvements in or relating to e.h.t. generator circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1405965A GB1067977A (en) 1965-04-02 1965-04-02 Improvements in or relating to e.h.t. generator circuits

Publications (1)

Publication Number Publication Date
GB1067977A true GB1067977A (en) 1967-05-10

Family

ID=10034254

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1405965A Expired GB1067977A (en) 1965-04-02 1965-04-02 Improvements in or relating to e.h.t. generator circuits

Country Status (1)

Country Link
GB (1) GB1067977A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2188377A1 (en) * 1972-06-15 1974-01-18 Radiotechnique Compelec
FR2518339A1 (en) * 1981-12-14 1983-06-17 Rca Corp HORIZONTAL DEVIATION CIRCUIT FOR TELEVISION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2188377A1 (en) * 1972-06-15 1974-01-18 Radiotechnique Compelec
FR2518339A1 (en) * 1981-12-14 1983-06-17 Rca Corp HORIZONTAL DEVIATION CIRCUIT FOR TELEVISION

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