FR2471101A2 - TV frame sweep DC voltage generator - feeds vertical sweep circuit and video amplifier supply from common winding - Google Patents

TV frame sweep DC voltage generator - feeds vertical sweep circuit and video amplifier supply from common winding Download PDF

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Publication number
FR2471101A2
FR2471101A2 FR7929765A FR7929765A FR2471101A2 FR 2471101 A2 FR2471101 A2 FR 2471101A2 FR 7929765 A FR7929765 A FR 7929765A FR 7929765 A FR7929765 A FR 7929765A FR 2471101 A2 FR2471101 A2 FR 2471101A2
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France
Prior art keywords
voltage
line
winding
circuit
current
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Granted
Application number
FR7929765A
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French (fr)
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FR2471101B2 (en
Inventor
Joseph Colineau
Gerard Rilly
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.)
Thomson-Brandt SA
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Thomson-Brandt 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
Priority claimed from FR7822266A external-priority patent/FR2438395A1/en
Application filed by Thomson-Brandt SA filed Critical Thomson-Brandt SA
Priority to FR7929765A priority Critical patent/FR2471101A2/en
Priority to EP80401693A priority patent/EP0030191B1/en
Priority to DE8080401693T priority patent/DE3063543D1/en
Priority to US06/211,206 priority patent/US4425533A/en
Priority to JP55169449A priority patent/JPH0614691B2/en
Priority to ES497394A priority patent/ES497394A0/en
Priority to PL22826280A priority patent/PL228262A1/xx
Publication of FR2471101A2 publication Critical patent/FR2471101A2/en
Publication of FR2471101B2 publication Critical patent/FR2471101B2/fr
Application granted granted Critical
Granted legal-status Critical Current

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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
    • 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
    • H03K4/625—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 using pulse-modulation techniques for the generation of the sawtooth wave, e.g. class D, switched mode
    • 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
    • H03K4/83—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices with more than two PN junctions or with more than three electrodes or more than one electrode connected to the same conductivity region
    • H03K4/835—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices with more than two PN junctions or with more than three electrodes or more than one electrode connected to the same conductivity region using pulse-modulation techniques for the generation of the sawtooth wave, e.g. class D, switched mode

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Abstract

Energy to drive current through the vertical diverter (DV) is drawn exclusively from a generator (2) supplied with line flyback pulses from the sec. winding (S1) of the line output transformer (TL). A capacitor (CL) and resistors (Rm,Rn) together with the divertor (DV) form a load impedance for this generator such that the voltage at its terminals is of constant sign, irrespective of the direction of divertor current. The DC voltage is produced by a rectifying circuit (D2,C2) connected to the same winding. For transistorised colour TV receivers the line transformer needing only one sec. winding is less bulky and costly. The generator (2) incorporates an active switch, bidirectional in current and unidirectional in voltage, comprising a thyristor (TH1) and inverse diode (D1) in series with the sec. winding. The thyristor gate (G) is pulsed by a negative-feedback control circuit (3) connected to a sawtooth generator (5) so that conduction time during each line is a function of the line number. The electrolytic capacitor (CL) is chosen so that the average positive voltage between its terminals is high enough to ensure a positive output to the thyristor control circuit.

Description

Durant l'aller de balayage trame, l'enroulement S1 du transfor- mateur ligne TL délivre des impulsions de retour ligne. Le condensateur CF constitue avec l'inductance LV du déviateur vertical DV, un filtre passe bas très efficace vis à vis de la fréquence ligne, et le courant traversant le déviateur est pratiquement égal à à la valeur moyenne du courant traversant l'inductance LS. During the frame sweep go, the winding S1 of the line transformer TL delivers line return pulses. The capacitor CF constitutes with the inductance LV of the vertical deflector DV, a low pass filter very effective with respect to the line frequency, and the current passing through the deflector is practically equal to the average value of the current passing through the inductance LS.

Or, la forme du courant dans l'inductance L@ dépendant de l'instant de fermeture du thyristor THl, son courant moyen en dépend aussi ainsi que le courant circulant dans le déviateur vertical,
Plus le thyristor THl est déclenché à un instant en avance sur l'instant de début de retour ligne, et plus le courant moyen dans l'inductance LS décroît par rapport à sa valeur maximale correspondant au cas où le thyristor TM1 est toujours bloqué.Now, the shape of the current in the inductance L @ depending on the instant of closure of the thyristor THl, its mean current also depends on it as well as the current flowing in the vertical deflector,
The more the thyristor TH1 is triggered at an instant ahead of the line return start instant, the more the average current in the inductance LS decreases compared to its maximum value corresponding to the case where the thyristor TM1 is always blocked.

I1 est donc possible de contr3ler la valeur du courant moyen dans l'inductance LS, donc la valeur du courant dans le déviateur vertical DV en contrôlant l'instant de fermeture du thyristor TH1
Un commande convenable du thyristor TH1 est assurée par un circuit de commande 3.It is therefore possible to control the value of the average current in the inductance LS, therefore the value of the current in the vertical deflector DV by controlling the instant of closure of the thyristor TH1
A suitable control of thyristor TH1 is ensured by a control circuit 3.

Ce circuit de commande 3, a une de ses entrées connectée aux bornes de la résistance de mesure R, m et et reçoit donc une tension fonction du courant traversant le déviateur vertical Dv
Une seconde entrée du circuit de commande 3 est connectée å un circuit 5 fournissant une tension en dents de scie corrigée, c'est à-dire une très bonne image de la forme du courant nécessaire à une bonne déviation verticale.This control circuit 3 has one of its inputs connected to the terminals of the measurement resistor R, m and therefore receives a voltage which is a function of the current flowing through the vertical deflector Dv
A second input of the control circuit 3 is connected to a circuit 5 providing a corrected sawtooth voltage, that is to say a very good image of the shape of the current necessary for a good vertical deflection.

Cette tension en dents de scie corrigée est comparée à da tension apparaissant aux bornes de la résistance de mesure Rm' et un signal d'erreur permettant la commande du thyristor TH1 apparaît en sortie du circuit de commande 3. This corrected sawtooth voltage is compared to da voltage appearing at the terminals of the measurement resistor Rm 'and an error signal allowing the control of the thyristor TH1 appears at the output of the control circuit 3.

Le circuit de commande 3 est synchronisé à la fréquence ligne par une entrée 4 recevant des impulsions à la fréquence ligne. The control circuit 3 is synchronized at the line frequency by an input 4 receiving pulses at the line frequency.

Lorsque la tension aux bornes de la résistance Rmaugmente, constituée du déviateur vertical en série avec un condensateur et une résistance de mesure. When the voltage across the resistor R increases, consisting of the vertical deflector in series with a capacitor and a measurement resistor.

La présente invention concerne un circuit de balayage trame en mode commuté à un seul interrupteur actif, mais dont Penrou- lement secondaire du transformateur ligne fournissant le signal alternatif à découper est connecté aux bornes dun circuit redresseur de manière à fournir une tension continue d'alimentation de l'étage vidéo du récepteur vidéofréquence. The present invention relates to a raster scanning circuit in switched mode with a single active switch, but the secondary transformer of the line transformer supplying the alternating signal to be cut is connected to the terminals of a rectifier circuit so as to supply a direct supply voltage. of the video stage of the video frequency receiver.

En effet, les amplificateurs vidéo qui attaquent les trois canons électroniques d'un tube cathodique en télévision couleur nécessitent une tension d'alimentation continue de l'ordre de quelques centaines de volts. Indeed, video amplifiers that attack the three electronic guns of a cathode ray tube in color television require a continuous supply voltage of the order of a few hundred volts.

Généralement, cette tension est obtenue par redressement de la tension disponible sur un enroulement auxiliaire supplémentaire du- transformateur -très haute tension ou transformateur ligne, pendant le retour de balayage ligne. Generally, this voltage is obtained by rectifying the voltage available on an additional auxiliary winding of the transformer - very high voltage or line transformer, during the line scan return.

La présente addition propose donc, de manière à diminuer le coût global du circuit de balayage, d'utiliser l'enroulement secondaire du circuit de balayage trame de la demande de brevet principal en source de tension périodique pour un circuit d'alimen- tation de l'étage vidéo et ceci sans nuire au bon fonctionnement de ce circuit de balayage trame. The present addition therefore proposes, in order to reduce the overall cost of the scanning circuit, to use the secondary winding of the frame scanning circuit of the main patent application as a periodic voltage source for a supply circuit of the video stage and this without affecting the proper functioning of this frame scanning circuit.

En effet, l'enroulement secondaire du transformateur ligne fournissant les signaux de retour de balayage ligne au circuit de balayage trame en mode commuté de la demande de brevet principal, est connecté en entrée d'un circuit redresseur de manière a' avoir en sortie de ce circuit redresseur une tension d'alimentation continue. Indeed, the secondary winding of the line transformer providing the line scan return signals to the frame scan circuit in switched mode of the main patent application, is connected at the input of a rectifier circuit so as to have at the output of this rectifier circuit a continuous supply voltage.

La présente addition sera mieux comprise à l'aide de la description suivante illustrée par la figure annexée qui représente:
- un schéma d'un circuit de balayage trame en mode commuté selon la présente addition.The present addition will be better understood with the aid of the following description illustrated by the appended figure which represents:
- a diagram of a frame scanning circuit in switched mode according to this addition.

L'impédance de charge du circuit de balayage trame en mode commuté est représentée en 1 et comporte le déviateur vertical DV protégé par une résistance Rd un condensateur de liaison CL et une résistance de mesure Rm Le condensateur CL est du type électrochimique polarisable, et est choisi de manière à avoir à ses bornes une tension dont la valeur moyenne soit suffisamment élevée et positive, entraînant ainsi une tension toujours positive aux bornes de la charge quel que soit le sens du courant traversant le déviateur Dv
Le générateur de dents de scie trame auquel est connectée cette charge doit donc être monodirectionnel en tension et bidirec tionnel en courant.The load impedance of the raster scan circuit in switched mode is represented in 1 and comprises the vertical deflector DV protected by a resistor Rd a connection capacitor CL and a measurement resistor Rm The capacitor CL is of the polarizable electrochemical type, and is chosen so as to have at its terminals a voltage whose average value is sufficiently high and positive, thus causing a voltage always positive at the terminals of the load regardless of the direction of the current passing through the deflector Dv
The weft sawtooth generator to which this load is connected must therefore be unidirectional in voltage and bidirectional in current.

Ce circuit générateur d'un signal en dents de scie est représenté en 2 et comporte un interrupteur actif bidirectionnel en courant et monodirectionnel en tension, connecté en série avec. un enroulement secondaire S1 du transformateur ligne TL, ainsi qu'avec une inductance L5 non couplée au transformateur ligne TL, l'ensem- ble étant connecté en parallèle avec un condensateur de filtrage CF. This circuit generating a sawtooth signal is shown in 2 and comprises an active bidirectional current and monodirectional voltage switch, connected in series with. a secondary winding S1 of the line transformer TL, as well as with an inductance L5 not coupled to the line transformer TL, the whole being connected in parallel with a filtering capacitor CF.

La valeur du condensateur CF est choisi suffisamment grande pour que la partie alternative de la tension à ses bornes soit très faible devant le signal aux bornes de ltenroulement S1, et donc négligeable. The value of the capacitor CF is chosen to be large enough so that the alternating part of the voltage at its terminals is very low compared to the signal at the terminals of the winding S1, and therefore negligible.

L'interrupteur actif comporte une diode D1 montée tête-bêche avec un thyristor TH1. La gâchette du thyristor TH1 est connectée à un circuit de commande 3. The active switch comprises a diode D1 mounted head to tail with a thyristor TH1. The trigger of thyristor TH1 is connected to a control circuit 3.

Ce thyristor peut être remplacé par un transistor NPN ou PNP en commutation, ou tout autre interrupteur actif. This thyristor can be replaced by a switching NPN or PNP transistor, or any other active switch.

Le thyristor TH1 fonctionne en interrupteur, c'est-à-dire que lorsque son courant gâchette est suffisant pour qu'il soit déclenché, il court-circuite la diode D1. The thyristor TH1 operates as a switch, that is to say that when its trigger current is sufficient for it to be triggered, it short-circuits the diode D1.

Uri tel interrupteur actif composé du thyristor TH1 et de la diode D1 est bidirectionnel en courant et monodirectionnel en tension. En effet, lorsqu'il est fermé, il peut être parcouru par des courants de sens opposés, et lorsqu'il est ouvert il présente à sesbornes une tension de polarité déterminée, correspondant à la tension inverse de la diode D1.  Such an active switch composed of thyristor TH1 and diode D1 is bidirectional in current and monodirectional in voltage. In fact, when it is closed, it can be traversed by currents in opposite directions, and when it is open it has at its terminals a voltage of determined polarity, corresponding to the reverse voltage of the diode D1.

La présente addition concerne un circuit de balayage trame en mode commuté comme décrit dans la demande de brevet principal et dont l'étage d'entrée est associée à un circuit d'alimentation de l'étage vidéo du récepteur vidéofréquence. The present addition relates to a frame scanning circuit in switched mode as described in the main patent application and the input stage of which is associated with a supply circuit of the video stage of the video frequency receiver.

Cette demande de brevet principal décrit un circuit de balayage vertical en mode commuté, à une seule voie, c'est-a-dire un seul interrupteur actif. This main patent application describes a vertical scanning circuit in switched mode, with a single channel, that is to say a single active switch.

En effet, le déviateur vertical assurant la déviation verticale du faisceau d'électrons du tube cathodique est - connecté en série avec un condensateur et une résistance de mesure. La charge ainsi formée ne se comporte plus, comme dans le cas du déviateur vertical seul, uniquement en récepteur énergie, car si la valeur moyenne de la tension aux bornes du condensateur est suffisamment élevée la tension aux bornes de cette charge garde la même polarité quel que soit le sens du courant traversant le déviateur. Indeed, the vertical deflector ensuring the vertical deflection of the electron beam of the cathode ray tube is - connected in series with a capacitor and a measurement resistor. The charge thus formed no longer behaves, as in the case of the vertical deflector alone, only as an energy receiver, because if the average value of the voltage across the capacitor is high enough the voltage across this charge keeps the same polarity which that is the direction of the current crossing the deflector.

Cette charge est alors connectée aux bornes d'un générateur d'un signal en dents de scie bidirectionnel en courant et monodirectionnel en tension. This load is then connected to the terminals of a generator of a sawtooth signal bidirectional in current and monodirectional in voltage.

Ce circuit générateur selon la demande de brevet principal génére dans le déviateur vertical un sigrial en dents de scie à partir des signaux de retour de balayage ligne disponibles aux bornes d'un enroulement secondaire du transformateur ligne. This generator circuit according to the main patent application generates in the vertical deflector a sawtooth sigrial from the line scan return signals available at the terminals of a secondary winding of the line transformer.

En effet, lors du retour de balayage ligne il apparaît dans les enroulements secondaires, un signal alternatif périodique à la fréquence ligne. Indeed, during the line scan return, a periodic alternating signal appears at the line frequency in the secondary windings.

Le courant en.dents de se est obtenu par un découpage de ce signal alternatif. Le découpage est effectué à l'aide d'un interrupteur actif bidirectionnel en courant et monodirectionnel en tension, connecté en série avec l'enroulement secondaire du transformateur ligne, ainsi qu'avec une inductance non couplée au transformateur ligne, l'ensemble étant monté en parallèle avec un condensateur de filtrage, lui-même en parallèle avec la charge l'instant de déclenchement du thyristor TH1 est avancé dans le temps, le courant dans le déviateur diminue, et donc la tension aux bornes de la résistance de mesure Rm diminue. On a alors une boude de régulation. The current in teeth is obtained by cutting this alternating signal. The cutting is carried out using an active bidirectional switch in current and monodirectional in voltage, connected in series with the secondary winding of the line transformer, as well as with an inductance not coupled to the line transformer, the assembly being mounted in parallel with a filter capacitor, itself in parallel with the load, the tripping instant of the thyristor TH1 is advanced in time, the current in the deflector decreases, and therefore the voltage across the terminals of the measurement resistor Rm decreases . We then have a regulatory sulk.

L'asservissement dynamique ainsi réalisé est tel que le courant traversant le déviateur vertical D V est l'image de la tension en dents de scie corrigée délivrée par le circuit 5
L'enroulement secondaire S1 du transformateur ligne délivrant des impulsions de retour ligne est connectée d'autre part a un circuit redresseur comportant une diode D2 dont la cathode est connectée à une borne d'un condensateur C2 dont la seconde borne est reliée à la masse.The dynamic control thus produced is such that the current passing through the vertical deflector DV is the image of the corrected sawtooth voltage delivered by the circuit 5
The secondary winding S1 of the line transformer delivering line return pulses is connected on the other hand to a rectifier circuit comprising a diode D2 whose cathode is connected to a terminal of a capacitor C2 whose second terminal is connected to ground .

Les impulsions de retour ligne sont donc redressées par ce circuit et on dispose ainsi en sortie S2S aux bornes du condeo sateur C2, d'une tension continue utilisable par exemple pour l'alimentation de l'étage vidéo du récepteur vidéofréquence.  The line return pulses are therefore rectified by this circuit and there is thus at the output S2S at the terminals of the conditioner C2, a DC voltage usable for example for supplying the video stage of the video frequency receiver.

Le fonctionnement du circuit de balayage trame en mode commuté n'est pas affecté par le branchement en parallèle du circuit redresseur, car en effet la diode D2 ne peut conduire que pendant le retour ligne, or pendant cette phase l'interrupteur actif est toujours fermé, et donc l'énergie consommé par, par exemple l'étage vidéo connecté aux bornes de sortie du redresseur, est fournie par l'entoulement S1; c'est-a-dire par le transformateur ligne. Un débit de l'alimentation va seulement se traduire par une augmentation du courant traversant la diode, mais par une diminution du courant traversant le thyristor TH1. The operation of the frame scanning circuit in switched mode is not affected by the parallel connection of the rectifier circuit, because in fact the diode D2 can only drive during line feed, but during this phase the active switch is always closed , and therefore the energy consumed by, for example the video stage connected to the output terminals of the rectifier, is supplied by the flow S1; that is to say by the line transformer. A flow rate of the supply will only result in an increase in the current passing through the diode, but in a decrease in the current passing through the thyristor TH1.

La valeur de la tension d'alimentation obtenue en S2 est ajustée à la valeur désirée en jouant sur le nombre de spire de l'enroulement secondaire S1 du transformateur ligne TL. Le circuit de balayage trame proprement dit s'adapte facilement au nombre de spire de l'enroulement S1, en jouant par exemple sur la valeur de l'inductance LS ou encore sur la valeur de l'impédance du dévia
vertical Dv.The value of the supply voltage obtained in S2 is adjusted to the desired value by varying the number of turns of the secondary winding S1 of the line transformer TL. The actual frame scanning circuit easily adapts to the number of turns of the winding S1, for example by varying the value of the inductance LS or even the value of the impedance of the devia
vertical Dv.

De plus, la diode D2 et le condensateur de filtrage C2 du circuit redresseur peuvent avoir un rôle de protection vis à vis des impulsions parasites qui peuvent provenir par exemple de la commutation de l'interrupteur actif. In addition, the diode D2 and the filtering capacitor C2 of the rectifier circuit can have a protective role against parasitic pulses which can come, for example, from the switching of the active switch.

Le même enroulement secondaire S1 du transformateur ligne peut donc fournir l'énergie nécessaire d'une part à la déviation trame et d'autre part à l'alimentation de l'étage vidéo. The same secondary winding S1 of the line transformer can therefore supply the energy necessary on the one hand for the frame deviation and on the other hand for the supply of the video stage.

Un tel circuit de balayage trame en mode commuté est principalement utilisé dans les récepteurs de télévision couleur transistorisés.  Such a switched mode frame scanning circuit is mainly used in transistorized color television receivers.

Claims (3)

REVENDICAllONSCLAIM 1. Circuit de balayage trame en mode commuté selon la revendication I de la demande de brevet principal, caractérisé en ce que l'enroulement secondaire (S1) du transformateur ligne (TL) fournissant les signaux de retour de balayage ligne au circuit génew rateur (2) d'un signal en dents de scie est connecté en entrée d'un circuit redresseur de manière qu'en sortie de celui-ci, une tension d'alimentation continue soit disponible. 1. Switched-frame frame scanning circuit according to claim I of the main patent application, characterized in that the secondary winding (S1) of the line transformer (TL) supplying the line scanning return signals to the generator circuit ( 2) a sawtooth signal is connected at the input of a rectifier circuit so that, at its output, a continuous supply voltage is available. 2. Circuit de balayage trame -selon la revendication 1, caractéri sé en ce que le circuit redresseur comporte une diode (D2) en série avec un condensateur (C2), le signal d'entrée provenant de l'enroulement secondaire (S1) étant injecté sur l'anode de la diode (D2) et la tension de sortie étant prélevée aux bornes du condensateur (C2). 2. Frame scanning circuit - according to claim 1, characterized in that the rectifier circuit comprises a diode (D2) in series with a capacitor (C2), the input signal coming from the secondary winding (S1) being injected on the anode of the diode (D2) and the output voltage being taken across the capacitor (C2). 3. Circuit de balayage trame selon l'une des revendications 1 ou 2, caractérisé en ce que la valeur de la tension d'alimentation continue est liée au nombre de spires de l'enroulement secondaire (S et peut être ainsi ajustée à une valeur prédéterminée.  3. Weft scanning circuit according to one of claims 1 or 2, characterized in that the value of the DC supply voltage is linked to the number of turns of the secondary winding (S and can thus be adjusted to a value predetermined.
FR7929765A 1978-07-27 1979-12-04 TV frame sweep DC voltage generator - feeds vertical sweep circuit and video amplifier supply from common winding Granted FR2471101A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR7929765A FR2471101A2 (en) 1978-07-27 1979-12-04 TV frame sweep DC voltage generator - feeds vertical sweep circuit and video amplifier supply from common winding
EP80401693A EP0030191B1 (en) 1979-12-04 1980-11-27 D.c. power supply generator and television receiver comprising such a generator
DE8080401693T DE3063543D1 (en) 1979-12-04 1980-11-27 D.c. power supply generator and television receiver comprising such a generator
US06/211,206 US4425533A (en) 1979-12-04 1980-11-28 Generator for producing a d.c. supply voltage in a television receiver comprising a vertical scanning circuit
JP55169449A JPH0614691B2 (en) 1979-12-04 1980-12-01 Television receiver with field scanning circuit
ES497394A ES497394A0 (en) 1979-12-04 1980-12-03 TELEVISION RECEIVER, ESPECIALLY IN COLOR AND TRANSISTORIZED TYPE
PL22826280A PL228262A1 (en) 1979-12-04 1980-12-04

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7822266A FR2438395A1 (en) 1978-07-27 1978-07-27 SWITCHED FRAME SCANNING CIRCUIT, AND VIDEO FREQUENCY RECEIVER PROVIDED WITH SUCH A CIRCUIT
FR7929765A FR2471101A2 (en) 1978-07-27 1979-12-04 TV frame sweep DC voltage generator - feeds vertical sweep circuit and video amplifier supply from common winding

Publications (2)

Publication Number Publication Date
FR2471101A2 true FR2471101A2 (en) 1981-06-12
FR2471101B2 FR2471101B2 (en) 1985-02-15

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FR7929765A Granted FR2471101A2 (en) 1978-07-27 1979-12-04 TV frame sweep DC voltage generator - feeds vertical sweep circuit and video amplifier supply from common winding

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FR (1) FR2471101A2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2318545A1 (en) * 1975-02-20 1977-02-11 Rca Corp VERTICAL DEVIATION CIRCUIT

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2318545A1 (en) * 1975-02-20 1977-02-11 Rca Corp VERTICAL DEVIATION CIRCUIT

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FR2471101B2 (en) 1985-02-15

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