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1. WO2000042765 - DYNAMIC DAMPING CLAMPER ARRANGEMENT ASSOCIATED WITH S-SHAPING CAPACITOR

Publication Number WO/2000/042765
Publication Date 20.07.2000
International Application No. PCT/US2000/000681
International Filing Date 11.01.2000
Chapter 2 Demand Filed 03.08.2000
IPC
H04N 3/233 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
3Scanning details of television systems; Combination thereof with generation of supply voltages
10by means not exclusively optical-mechanical
16by deflecting electron beam in cathode-ray tube
22Circuits for controlling dimensions, shape or centering of picture on screen
23Distortion correction, e.g. for pincushion distortion correction, S-correction
233using active elements
CPC
H04N 3/233
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
3Scanning details of television systems; Combination thereof with generation of supply voltages
10by means not exclusively optical-mechanical
16by deflecting electron beam in cathode-ray tube ; , e.g. scanning corrections
22Circuits for controlling dimensions, shape or centering of picture on screen
23Distortion correction, e.g. for pincushion distortion correction, S-correction
233using active elements
Applicants
  • THOMSON LICENSING S.A. [FR/FR]; 46, quai Alphonse Le Gallo F-92648 Boulogne Cedex, FR (AllExceptUS)
  • TRUSKALO, Walter [US/US]; US (UsOnly)
Inventors
  • TRUSKALO, Walter; US
Agents
  • TRIPOLI, Joseph, S. ; Thomson Multimedia Licensing Incorporated P.O. Box 5312 Princeton, NJ 08540, US
Priority Data
09/246,27908.02.1999US
60/115,70812.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DYNAMIC DAMPING CLAMPER ARRANGEMENT ASSOCIATED WITH S-SHAPING CAPACITOR
(FR) CIRCUIT DE CALAGE A AMORTISSEMENT DYNAMIQUE ASSOCIE A UNE CAPACITE S
Abstract
(EN)
A resistor-capacitor-diode clamp is coupled to an S-capacitance of a horizontal deflection circuit output stage for reducing ringing by causing critical damping. The supply voltage of the output stage varies at a vertical rate parabolic manner for modulating the horizontal deflection current to provide East-West correction. A clamp capacitor of the clamp has a terminal that is direct current coupled to the supply voltage. Therefore, each terminal of the clamp capacitor has the same vertical rate parabola component. Consequently, the DC voltage difference developed between the terminals of the clamp capacitor does not include any vertical rate parabola component. The result is that the sensitivity of the damping to the supply voltage vertical rate variations is, advantageously, eliminated or reduced.
(FR)
L'invention concerne un circuit de calage de résistance-condensateur-diode couplé à une capacité S d'un étage de sortie d'un circuit de déviation horizontale permettant de réduire les oscillations de dépassement en provoquant un amortissement critique. La tension d'alimentation de l'étage de sortie varie de matière parabolique et verticale pour moduler le courant de déviation horizontale et assurer une correction Est-Ouest. Un condensateur à circuit de calage comporte une borne qui est couplée en courant continu à la tension d'alimentation. Par conséquent, chaque borne du condensateur présente la même composante de parabole à vitesse verticale. De ce fait, la différence de tension en courant continu générée entre les bornes du condensateur ne comprend aucune composante de parabole verticale. Ainsi, la sensibilité de l'amortissement aux variations de la tension d'alimentation à vitesse verticale est supprimée ou réduite de manière avantageuse.
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