JPS57206174A - High voltage generating circuit - Google Patents

High voltage generating circuit

Info

Publication number
JPS57206174A
JPS57206174A JP9030081A JP9030081A JPS57206174A JP S57206174 A JPS57206174 A JP S57206174A JP 9030081 A JP9030081 A JP 9030081A JP 9030081 A JP9030081 A JP 9030081A JP S57206174 A JPS57206174 A JP S57206174A
Authority
JP
Japan
Prior art keywords
winding
voltage
power supply
capacitor
diode
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.)
Pending
Application number
JP9030081A
Other languages
Japanese (ja)
Inventor
Shoji Munekawa
Masakatsu Fujita
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9030081A priority Critical patent/JPS57206174A/en
Publication of JPS57206174A publication Critical patent/JPS57206174A/en
Pending 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
    • H04N3/18—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

PURPOSE:To generate a high level of voltage as desired regardless of an increment of the switching frequency, by setting a diode and a capacitor which is charged by a power supply between a primary winding and the power supply of a flyback transformer. CONSTITUTION:The primary winding L of a flyback transformer T receives the voltage from a power supply E via a transistor Q which is turned on and off by the horizontal scanning frequency. Thus the voltage of several hundreds volt is obtained from the resonance of the winding L and a resonance capacitor C. As shown in the diagram, a diode D' and a capacitor C' are provided between the power supply E and the winding L. The capacitor C' is charged by the source E via the diode D' and also by the stored energy of the winding L. As a result, a high voltage generating circuit can supply a sufficiently large primary current to the winding L and can produce a desired high level of voltage at a secondary winding. Thus this circuit is suitably applied to a monitor TV, etc. having a high image resolution.
JP9030081A 1981-06-12 1981-06-12 High voltage generating circuit Pending JPS57206174A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9030081A JPS57206174A (en) 1981-06-12 1981-06-12 High voltage generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9030081A JPS57206174A (en) 1981-06-12 1981-06-12 High voltage generating circuit

Publications (1)

Publication Number Publication Date
JPS57206174A true JPS57206174A (en) 1982-12-17

Family

ID=13994681

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9030081A Pending JPS57206174A (en) 1981-06-12 1981-06-12 High voltage generating circuit

Country Status (1)

Country Link
JP (1) JPS57206174A (en)

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