DE2116590C3 - Push-pull transformer DC voltage converter for supplying voltage to television picture recording or display tubes - Google Patents

Push-pull transformer DC voltage converter for supplying voltage to television picture recording or display tubes

Info

Publication number
DE2116590C3
DE2116590C3 DE19712116590 DE2116590A DE2116590C3 DE 2116590 C3 DE2116590 C3 DE 2116590C3 DE 19712116590 DE19712116590 DE 19712116590 DE 2116590 A DE2116590 A DE 2116590A DE 2116590 C3 DE2116590 C3 DE 2116590C3
Authority
DE
Germany
Prior art keywords
transistor
push
voltage converter
voltage
transformer
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
DE19712116590
Other languages
German (de)
Other versions
DE2116590B2 (en
DE2116590A1 (en
Inventor
Gerhard Lange
Juergen Von Luehrte
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 Intellectual Property and Standards GmbH
Original Assignee
Philips Patentverwaltung GmbH
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 Philips Patentverwaltung GmbH filed Critical Philips Patentverwaltung GmbH
Priority to DE19712116590 priority Critical patent/DE2116590C3/en
Publication of DE2116590A1 publication Critical patent/DE2116590A1/en
Publication of DE2116590B2 publication Critical patent/DE2116590B2/en
Application granted granted Critical
Publication of DE2116590C3 publication Critical patent/DE2116590C3/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
    • H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
    • H02M3/3372—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration of the parallel type

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Dc-Dc Converters (AREA)
  • Amplifiers (AREA)

Description

Die Erfindung bezieht sich auf einen transformatotisch gekoppelten Gegentakt-Transistorgleichspannungswandler zur Spannungsversorgung von Femsehbildaufnahme- oder Bildwiedergaberöhren, z. B. für Fernsehketten und Monitore.The invention relates to a transformer table Coupled push-pull transistor DC voltage converter for power supply of TV picture recording or display tubes, e.g. B. for television chains and monitors.

Aufgabe der Erfindung ist es, die Spannungen zum Betrieb von Bildaufnahmeröhren, z. B. Vidicon, SEC-Vidicon und Plumbicon, bzw. die Hochspannung zum Betrieb von Bildröhren zu erzeugen oder Bildverstärkerröhren mit Hochspannung zu versorgen, ohne daß im wiedergegebenen Fernsehbild sichtbare Störungen durch diese Spannungsversorgungsschaltung auftreten. Es sind zwar fremdgesteuerte Transistorgleichspannungswandler bekannt, doch ergeben sich bei diesen Schaltungsanordnungen Störungen im Fernsehbild, da sich die vom Impulsgenerator erzeugten Impulse nicht ohne weiteres für die Bildmodulalion störungsfrei herstellen lassen oder Auswirkungen der Oszillatorschwingungen auf das Bild verhindert werden können.The object of the invention is to reduce the voltages for operating image pickup tubes, e.g. B. Vidicon, SEC-Vidicon and Plumbicon, or the high voltage for operating picture tubes or picture intensifier tubes to be supplied with high voltage without any visible interference in the television picture displayed occur through this power supply circuit. They are externally controlled transistor DC voltage converters known, but these circuit arrangements result in disturbances in the television picture, since the impulses generated by the impulse generator are not easily used for the image modulation Can be produced without interference or the effects of the oscillator vibrations on the image are prevented can be.

Die Aufgabe wird daher gemäß der Erfindung dadurch gelöst, daß der Oszillator des Gleichspannungswandlers nur von den verstärkten Bildaustastimpulsen aufgetastet wird. Der getastete Gegentakt-TransistorgleichEpannungswandler schwingt nur während der Bildaustastzeit, so daß eventuelle Störungen durch den Oszillator des Wandlers oder seiner Ansteuerung im Bild nicht sichtbar werden.
Die Figur stellt ein Ausführungsbeispiel dar.
Der transformatorisch gekoppelte Gegentakt-Transistorgleichspannungswandler besteht aus den Transistoren T1, T2 und einem Transformator T mit der in den Kollektorkreisen liegenden Wicklung W1 und der in den Basiskreisen liegenden Wicklung W2. Die Basiskreise der Transistoren T1, T2 sind über dieThe object is therefore achieved according to the invention in that the oscillator of the DC voltage converter is only gated by the amplified image blanking pulses. The keyed push-pull transistor DC voltage converter only oscillates during the image blanking time, so that any disturbances caused by the converter oscillator or its control are not visible in the image.
The figure represents an embodiment.
The transformer-coupled push-pull transistor DC voltage converter consists of the transistors T 1 , T 2 and a transformer T with the winding W 1 in the collector circuits and the winding W 2 in the base circuits . The base circuits of the transistors T 1 , T 2 are on the

ίο Wicklung w„ mit einem Schaltertransistor T3 verbunden, in dessen Ausgang ein RC-Netzwerk R1, C1, C2 liegt. Der Schaltertransistor T3 wird von einer Transistorverstärkerstufe T4, T5 angesteuert, die die Bildaustastimpulse über den Kondensator C3 aufnehmen.ίο winding w " connected to a switch transistor T 3 , in whose output an RC network R 1 , C 1 , C 2 is located. The switch transistor T 3 is controlled by a transistor amplifier stage T 4 , T 5 , which receive the image blanking pulses via the capacitor C 3.

»5 Der Auslastimpuls ist periodisch (50 Hz). Seine Dauer beträgt etwa 1 ms. In der Schaltung wird ein positiver Impuls an den Punkt/! gegeben. Der Kondensator C3 trennt ein etwa überlagertes Gleichspannungssignal von dem Transistor T4. Die Transistoren»5 The load pulse is periodic (50 Hz). Its duration is about 1 ms. In the circuit, a positive pulse is applied to the point /! given. The capacitor C 3 separates an approximately superimposed direct voltage signal from the transistor T 4 . The transistors

T4 und T5 verstärken den Impuls. Mit dem Transistor T3 wird der nötige Basisstrom für den Gegentaktoszillator T1, T2 geschaltet. Es kann nur ein Basisstrom fließen und damit der Oszillator schwingen, wenn an der Basis von Transistor T3 ein positivesT 4 and T 5 amplify the pulse. The necessary base current for the push-pull oscillator T 1 , T 2 is switched with the transistor T 3. Only a base current can flow and thus the oscillator can oscillate if there is a positive at the base of transistor T 3

as Potential anliegt. Der Oszillator arbeitet z. B. mit einer Frequenz von 30 bis 35 kHz. Das entspricht etwa 30 Schwingungen pro Impulsdauer bzw. pro Bild-Amtasteeit (20 ms).the potential is present. The oscillator works z. B. with a frequency of 30 to 35 kHz. This corresponds to about 30 oscillations per pulse duration or per Image exchange time (20 ms).

Um nach Beendigung des Impulses ein möglichst schnelles Abklingen der Oszillatorschwingungen zu erreichen, ist eine Dämpfung vorgesehen. Hierzu ist eine Transistorstufe T6 über einen Transistorverstärker T1 an den Ausgang des Transistors T5 angeschlossen. Im Kollektorkreis der Transistorstufe T6 liegtIn order to achieve the fastest possible decay of the oscillator oscillations after the end of the pulse, damping is provided. For this purpose, a transistor stage T 6 is connected to the output of transistor T 5 via a transistor amplifier T 1 . In the collector circuit of the transistor stage T 6 is located

eine Wicklung w3 des Transformators T über eine Diode D1 Der Transistor T6 ist während der Impulsdauer gesperrt und kann somit die Schwingungen nicht dämpfen. Nach Beendigung des Impulses liegt an der Basis von der Transistorstufe T6 positives Po-a winding w 3 of the transformer T via a diode D 1 The transistor T 6 is blocked during the pulse duration and can therefore not dampen the vibrations. After the end of the pulse, the base of the transistor stage T 6 has positive po-

teniial. Die ausklagende Schwingung wird mit der Diode D1 gleichgerichtet, und durch die Kollektor-Emitter-Strecke des Transistors der Transistorstufe T6 kann ein Laststrom fließen. Mit dieser Dämpfung wird erreicht, daß nach zwei Oszillatorschwingungen (etwa 60 μ:>) die Schwingung fast völlig abgeklungen ist.teniial. The swinging oscillation is rectified with the diode D 1 , and a load current can flow through the collector-emitter path of the transistor of the transistor stage T 6. This damping ensures that after two oscillator oscillations (approx. 60 μ:>) the oscillation has almost completely subsided.

Mit einer weiteren nicht dargestellten Wicklung des Transformators T kann die Oszillatorspannung auf etwa 1 bis 2 kV transformiert und dann entsprechend gleichgerichtet werden. Ferner kann mit einer an sich bekannten Kaskadenschaltung auch die Hochspannung für Bildverstärkerröhren (etwa 16 kV) erzeugt werden.With a further winding, not shown, of the transformer T , the oscillator voltage can be transformed to approximately 1 to 2 kV and then correspondingly rectified. Furthermore, the high voltage for image intensifier tubes (about 16 kV) can also be generated with a cascade circuit known per se.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (2)

Patentansprüche:Patent claims: 1. Transformatorisch gekoppelter Gegentakt-Transistorgleichspannungswandler zur Spannungsversorgung von Femsehbildaufnahme- oder Bildwiedergaberöhren, z. B. für Fernsehketten und Monitore, dadurch gekennzeichnet, daß der Oszillator des Gleichspannungswandlers nur von den verstärkten Bildaustastimpulsen aufgetastet wird.1. Transformer-coupled push-pull transistor DC voltage converter for power supply of TV picture recording or picture display tubes, z. B. for television chains and Monitors, characterized in that the oscillator of the DC voltage converter only is gated by the amplified image blanking pulses. 2. Gegentakt-Transistorgleichspannungswandler nach Anspruch 1, dadurch gekennzeichnet, daß die Verstärkerstufe (T4, T5) für die Bildaustastimpulse mit der Basis eines Schaltertransistors (T3) und mit der Basis einer während der Impulsdauer gesperrten Transistorstufe (T6) verbunden ist, deren Ausgangskreis aus einer mit einer Wicklung (w,) des Transformators (T) in Serie geschalteten Diode (D1) besteht.2. Push-pull transistor DC voltage converter according to claim 1, characterized in that the amplifier stage (T 4 , T 5 ) for the image blanking pulses is connected to the base of a switch transistor (T 3 ) and to the base of a transistor stage (T 6 ) which is blocked during the pulse duration whose output circuit consists of a diode (D 1 ) connected in series with a winding (w,) of the transformer (T).
DE19712116590 1971-04-05 1971-04-05 Push-pull transformer DC voltage converter for supplying voltage to television picture recording or display tubes Expired DE2116590C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712116590 DE2116590C3 (en) 1971-04-05 1971-04-05 Push-pull transformer DC voltage converter for supplying voltage to television picture recording or display tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712116590 DE2116590C3 (en) 1971-04-05 1971-04-05 Push-pull transformer DC voltage converter for supplying voltage to television picture recording or display tubes

Publications (3)

Publication Number Publication Date
DE2116590A1 DE2116590A1 (en) 1972-10-19
DE2116590B2 DE2116590B2 (en) 1974-07-04
DE2116590C3 true DE2116590C3 (en) 1975-02-13

Family

ID=5803915

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19712116590 Expired DE2116590C3 (en) 1971-04-05 1971-04-05 Push-pull transformer DC voltage converter for supplying voltage to television picture recording or display tubes

Country Status (1)

Country Link
DE (1) DE2116590C3 (en)

Also Published As

Publication number Publication date
DE2116590B2 (en) 1974-07-04
DE2116590A1 (en) 1972-10-19

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee