FR2382812A1 - Switched mode power supply for colour TV - has capacitor across transformer primary to reduce natural frequency of oscillation, and gate in switch control circuit (BE 1.9.78) - Google Patents

Switched mode power supply for colour TV - has capacitor across transformer primary to reduce natural frequency of oscillation, and gate in switch control circuit (BE 1.9.78)

Info

Publication number
FR2382812A1
FR2382812A1 FR7706201A FR7706201A FR2382812A1 FR 2382812 A1 FR2382812 A1 FR 2382812A1 FR 7706201 A FR7706201 A FR 7706201A FR 7706201 A FR7706201 A FR 7706201A FR 2382812 A1 FR2382812 A1 FR 2382812A1
Authority
FR
France
Prior art keywords
colour
transformer primary
gate
power supply
transistor
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.)
Granted
Application number
FR7706201A
Other languages
French (fr)
Other versions
FR2382812B1 (en
Inventor
Claude Iroulart
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.)
Radiotechnique Compelec RTC SA
Original Assignee
Radiotechnique Compelec RTC SA
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 Radiotechnique Compelec RTC SA filed Critical Radiotechnique Compelec RTC SA
Priority to FR7706201A priority Critical patent/FR2382812A1/en
Priority to DE19782807219 priority patent/DE2807219A1/en
Priority to BE185589A priority patent/BE864455A/en
Priority to JP2216878A priority patent/JPS53107621A/en
Publication of FR2382812A1 publication Critical patent/FR2382812A1/en
Application granted granted Critical
Publication of FR2382812B1 publication Critical patent/FR2382812B1/fr
Granted 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
    • H04N3/185—Maintaining dc voltage constant

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Dc-Dc Converters (AREA)
  • Television Receiver Circuits (AREA)

Abstract

The switched mode power supply is designed to provide the supply voltage for a colour T.V. receiver's deflection circuits. The switching transistor and the rectifier need not be designed for extremely high loads, while satisfactory operational efficiency is maintained. Moreover, the circuit is simplified so that the diode modulator or similar circuit arrangements can be dispensed with. The natural frequency of oscillations of the transformer primary, the latter forming a series-circuit with a controlled switch is reduced by means of a capacitor connected in parallel with the transformer's primary. The transistor-switch ddrive or control circuit contains a gate, so as to prevent the transistor-switch being made conductive before the end of transformer primary winding's oscillation set up when the transistor is blocked.
FR7706201A 1977-03-03 1977-03-03 Switched mode power supply for colour TV - has capacitor across transformer primary to reduce natural frequency of oscillation, and gate in switch control circuit (BE 1.9.78) Granted FR2382812A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7706201A FR2382812A1 (en) 1977-03-03 1977-03-03 Switched mode power supply for colour TV - has capacitor across transformer primary to reduce natural frequency of oscillation, and gate in switch control circuit (BE 1.9.78)
DE19782807219 DE2807219A1 (en) 1977-03-03 1978-02-20 SWITCHED SUPPLY VOLTAGE SWITCHING
BE185589A BE864455A (en) 1977-03-03 1978-03-01 REGULATED POWER SUPPLY WITH DECOUPAGE AND TELEVISION EQUIPPED WITH SUCH POWER SUPPLY
JP2216878A JPS53107621A (en) 1977-03-03 1978-03-01 Power supply for switching mode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7706201A FR2382812A1 (en) 1977-03-03 1977-03-03 Switched mode power supply for colour TV - has capacitor across transformer primary to reduce natural frequency of oscillation, and gate in switch control circuit (BE 1.9.78)

Publications (2)

Publication Number Publication Date
FR2382812A1 true FR2382812A1 (en) 1978-09-29
FR2382812B1 FR2382812B1 (en) 1982-03-26

Family

ID=9187491

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7706201A Granted FR2382812A1 (en) 1977-03-03 1977-03-03 Switched mode power supply for colour TV - has capacitor across transformer primary to reduce natural frequency of oscillation, and gate in switch control circuit (BE 1.9.78)

Country Status (4)

Country Link
JP (1) JPS53107621A (en)
BE (1) BE864455A (en)
DE (1) DE2807219A1 (en)
FR (1) FR2382812A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498030A1 (en) * 1981-01-13 1982-07-16 Philips Nv CIRCUIT PROVIDED IN IMAGE REPRODUCTION DEVICE AND FOR GENERATING LINE DRIVING CURRENT INTO SAW TEETH
FR2503959A1 (en) * 1981-04-08 1982-10-15 Philips Nv CIRCUIT FOR PROVIDING A SAW TOOTH CURRENT
EP0090085A2 (en) * 1982-03-25 1983-10-05 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. Synchronized switched-mode power supply unit with power line isolated horizontal output stage in television receivers
EP0163235A2 (en) * 1984-05-30 1985-12-04 Nokia Unterhaltungselektronik (Deutschland) GmbH Switched power supply

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7803661A (en) * 1978-04-06 1979-10-09 Philips Nv TUNED SWITCHED POWER SUPPLY CIRCUIT.
US4504895A (en) * 1982-11-03 1985-03-12 General Electric Company Regulated dc-dc converter using a resonating transformer
US4692852A (en) * 1986-06-25 1987-09-08 Rca Corporation Switching power supply with raster width stabilization
JPH04150767A (en) * 1990-10-08 1992-05-25 Fuji Electric Co Ltd Switching power supply circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498030A1 (en) * 1981-01-13 1982-07-16 Philips Nv CIRCUIT PROVIDED IN IMAGE REPRODUCTION DEVICE AND FOR GENERATING LINE DRIVING CURRENT INTO SAW TEETH
FR2503959A1 (en) * 1981-04-08 1982-10-15 Philips Nv CIRCUIT FOR PROVIDING A SAW TOOTH CURRENT
EP0090085A2 (en) * 1982-03-25 1983-10-05 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. Synchronized switched-mode power supply unit with power line isolated horizontal output stage in television receivers
EP0090085A3 (en) * 1982-03-25 1984-03-07 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig & Co. Kg. Synchronized switched-mode power supply unit with power line isolated horizontal output stage in television receivers
EP0163235A2 (en) * 1984-05-30 1985-12-04 Nokia Unterhaltungselektronik (Deutschland) GmbH Switched power supply
EP0163235A3 (en) * 1984-05-30 1988-10-26 Nokia Unterhaltungselektronik (Deutschland) GmbH Switched power supply

Also Published As

Publication number Publication date
BE864455A (en) 1978-09-01
JPS53107621A (en) 1978-09-19
DE2807219A1 (en) 1978-09-07
FR2382812B1 (en) 1982-03-26

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Legal Events

Date Code Title Description
ST Notification of lapse