Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1991-05-17
1992-08-11
Issing, Gregory C.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315391, 315370, G09G 104, H01J 2956
Patent
active
051382385
ABSTRACT:
A winding of a transformer is wound around a core bead that surrounds a wire conducting a horizontal deflection current. Close to a time when zero crossing occurs in the horizontal deflection current, at the center of horizontal trace, the core of the transformer changes from being saturated to being nonsaturated and a pulse is produced in the transformer. The pulse triggers a one-shot multivibrator arrangement that produces a reset pulse. A horizontal rate parabolic voltage generator is responsive to the reset pulse for generating a horizontal rate parabolic voltage that is coupled to an auxiliary coil mounted on a cathode ray tube to produce, for example, a vertical convergence error correction current.
REFERENCES:
patent: 3398319 (1968-08-01), Lemke et al.
patent: 3398320 (1968-08-01), Hursch
patent: 4321511 (1982-03-01), Willis
patent: 4500816 (1985-02-01), Murphy
patent: 4510527 (1985-04-01), den Hollander
patent: 4611151 (1986-09-01), Hoover et al.
patent: 4623825 (1986-11-01), Wahlquist et al.
patent: 5034664 (1991-07-01), Fernsler et al.
U.S. Patent Ser. No. 515,972, entitled Parabola Generators with Auxiliary Reset Function, in the names of Fernsler et al.
Henig Sammy S.
Issing Gregory C.
Laks Joseph J.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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